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Reverse Horn Voice - Prompting IC - KT148A Broadcasting Chip, Building a Solid Safety Line

When vehicles and mechanical equipment are reversing, the driver's line of sight is often blocked by the vehicle body, cargo, or environmental factors, creating a large blind spot. For large - scale equipment such as forklifts, excavators, and heavy - duty trucks, due to their large size and limited visibility, the accident risk is even higher. Moreover, traditional reverse alarm sounds are mostly monotonous beeps, which have low recognition in noisy industrial environments or traffic roads and are difficult to attract the sufficient attention of people around.

To address this safety pain point, reverse horns are evolving from simple buzzers to intelligent devices with voice - prompting functions. Voice prompts can convey reversing information clearly and explicitly in words. Compared with a single beep, they can more effectively attract the attention of people around, enhance the warning effect, and reduce the probability of reversing accidents.

Demand Design for Reverse Horn Voice Solutions：

Without the warning of a reverse horn, people around may not be able to detect the vehicle's reversing in time. When the line of sight is blocked or attention is distracted, accidents such as vehicles colliding with pedestrians or running over objects are likely to occur.

Without a reverse horn, the driver can only use methods such as waving hands or shouting to remind people around to give way. However, these methods are limited by factors such as environmental noise and distance, and cannot ensure the effective transmission of information. This leads to low reversing operation efficiency and may also cause misunderstandings and conflicts due to poor communication.

In case of a reversing accident, if there is no effective warning device such as a reverse horn, it is difficult to prove whether the driver has fulfilled the necessary safety - prompting obligation during the accident liability determination, increasing the complexity of liability division and the risk of disputes.

KT148A Voice Chip Solution for Reverse Horn： Adding the KT148A voice - broadcasting chip to the reverse horn can achieve functions such as "reverse reminder, left - turn reminder, right - turn reminder". When reversing, through this alarm chip, passers - by can know the vehicle's driving direction in time, playing a reminder role. It not only makes the driver actively aware of safety but also reminds passers - by to pay attention to passing pedestrians and vehicles.

The KT148A voice chip, with its numerous outstanding features, is often selected by manufacturers of alarm - type products. It is an industrial - grade voice chip suitable for mass production by voice horn manufacturers and an excellent option for the voice chip of reverse horns.

Ultra - low Power Consumption：It features ultra - low power consumption, with standby power consumption less than 25μA and a low - power mode of only 1.5μA, effectively saving energy.

Seamless Voice Integration：It can achieve seamless voice integration, easily integrating into various equipment systems.

Ultra - simple Peripheral Circuit：The peripheral circuit is ultra - simple. It interfaces with the main control system of the reverse horn conveniently and efficiently, greatly reducing the product research and development cost and development cycle. Enterprises can quickly complete the chip's program burning and function debugging according to their own needs, realizing the intelligent upgrade of the reverse horn.

Ultra - low Cost：It has an ultra - low cost, providing strong support for enterprises to reduce production costs.

Powerful Voice Functionality：It has a built - in 420K Byte voice storage space, supports 224 segment addresses and can be expanded to meet more needs. It supports up to 200 seconds of voice playback at 16KHz and up to 400 seconds at 8KHz. Tools are provided for users to convert audio formats themselves, which is very simple for all users. Users can also replace the voice content directly via the serial port on a computer without the need for other expensive tools.

High - fidelity Voice Output：As a 32 - bit DSP voice chip, it uses 16 - bit PWM output and can directly drive an 8 - ohm / 0.5W speaker to achieve clear, loud, and distortion - free voice playback. It has an 8 - level volume adjustment function, allowing for flexible adjustment of the voice playback volume according to different scenarios to achieve the best warning effect.

Stable and Reliable Operating Performance：The chip adopts a highly integrated design, with a 5MHz internal oscillator and PLL up to 120MHz. It has excellent anti - interference capabilities, an operating voltage range of 2.0 - 5.5V (note that there are detailed hardware differences when supplying below 3.3V), and can work stably in complex environments such as high - temperature, humid, and electromagnetic - interference conditions.

Flexible Development and Control：It supports one - wire serial port control and can customize various protocols according to needs. It has hardware IIC and UART interfaces, enabling customization of various functions for customers. The chip also has the ability to be reprogrammed, eliminating concerns about batch issues caused by incomplete testing.

Entry Content of Reverse Horn Voice Chip (Platform - Customizable)：

Basic Warning Category：

"Attention, the vehicle is reversing. Please keep away!"

"Reversing is dangerous. Do not approach!"

Stage - by - Stage Prompting Category：

At the start of reversing: "Reversing starts. Please pay attention to safety, people around!"

When approaching an obstacle: "There is an obstacle ahead. Be careful while reversing!"

Multi - language Prompting Category：

Chinese: "There is a pedestrian behind the vehicle. Reversing stopped!"

English: "Pedestrian detected, reversing stopped!"

Other languages: According to the needs of the usage area, voice prompts in languages such as Spanish and Arabic can be added to meet the requirements of international scenarios.

Brand - Customized Category：Enterprises can add brand - exclusive voices, such as "The vehicle of XX company is reversing. Please pay attention to safety!", which not only ensures safety but also strengthens brand promotion.

The KT148A voice chip has brought intelligent and human - centered upgrades to reverse horns. Through clear and diverse voice prompts, it effectively improves the safety and communication efficiency of reversing operations. It is widely applicable to various fields such as consumer electronics, automotive and transportation, industrial and safety equipment, healthcare and accessibility, home appliances and utilities, retail and public services, agriculture and environment monitoring. In the current context where industrial safety and transportation safety are highly valued, reverse horns equipped with the KT148A chip will surely become a standard safety device for various vehicles and mechanical equipment, building a solid defense line for personnel and property safety. In the future, Qingyue Electronics will also continue to optimize the performance of the KT148A chip, explore more applications of voice - interaction technologies in the field of safety warnings, and promote the continuous improvement of the industry's safety level.

Product details, product information, and sample acquisition and ordering links: KT148A: More

[blevoice]

The Mystery Behind JL (JieLi) Audio Bluetooth Chips for 9.9 - Yuan Wireless Bluetooth Earbuds with Free Shipping

Can you believe that there are 9.9 - yuan wireless Bluetooth earbuds with free shipping? Regardless of the quality and sound quality of these earbuds, the fact that they can achieve normal operation of functions such as Bluetooth wireless connection and pairing, earbud audio playback via Bluetooth, and charging case charging at such a low price is undoubtedly an ultimate manifestation of cost - effectiveness and a miracle of Made in China. Now, let's explore the core of these earbuds - JL (JieLi) Audio Bluetooth Chips, and find out what advantages they rely on to help Bluetooth earbud manufacturers achieve this.

1.High - integration Design：JL (JieLi) Bluetooth chips adopt a highly integrated design, integrating multiple functional modules into a single chip. Some chips have a rich built - in driver library, allowing developers to achieve functions like Bluetooth connection and audio codec without adding a large number of additional chips or modules, significantly reducing the overall hardware cost.

2.Self - developed IP Core and Local Supply Chain Cooperation：

Self - developed IP Core：By developing its own IP core, JL (JieLi) reduces its dependence on external intellectual property, thus lowering the intellectual property licensing fees.

Local Supply Chain Cooperation：Collaborating closely with local supply chains such as SMIC, JL (JieLi) takes advantage of the cost - advantage of the local supply chain to compress the chip cost to 60% of that of international giants, laying a solid foundation for low - cost Bluetooth earbud solutions.

3.Mature Production Process：

Advanced Process：Some chips adopt a mature production process. For example, the KT6368A Bluetooth chip is based on a 40 - nanometer process and 12 - inch wafers, which not only improves performance but also effectively controls costs.

Optimized Packaging：The adoption of SOP8 packaging further reduces the development and production costs for customers.

4.Cost Reduction through Mass Production：As of 2023, the cumulative sales of JL (JieLi) Bluetooth audio chips have exceeded 10 billion pieces, with a high market share. Mass production has significantly reduced the unit production cost. As fixed costs are allocated to more products, the cost per chip decreases, creating price space for low - priced Bluetooth earbuds.

5.Rapid Chip Iteration：JL (JieLi) shortens the chip iteration cycle to once every six months. By continuously launching chips with better performance and lower costs, it continuously optimizes product solutions. Each iteration has local breakthroughs, enabling better cost control while improving chip performance to meet the market demand for low - priced products.

6.Simplified Development Process：

Abundant Development Tools：JL (JieLi) chips provide a wealth of development tools and development environments, with built - in hardware accelerators that improve the chip's computing efficiency and data processing speed, reducing the system cost.

Shorter Development Cycle：Developers can carry out product development more conveniently and quickly, shortening the product launch time and reducing development costs, which indirectly reduces the cost of Bluetooth earbuds using JL (JieLi) chips.

The ability to produce Bluetooth earbuds with normal functions at such a price is already an ultimate display of cost - effectiveness and a miracle of Made in China.

Product details, product information, and sample acquisition and ordering links: KT6368A: Bluetooth Chip Product Details

[blevoice]

KT6368A Bluetooth Module - An Efficient Bridge for Data Interoperability in Electronic Medicine Boxes

Key Features of the Core Chip: Dual Benefits of Low Power Consumption and High Compatibility

The KT6368A is a Bluetooth 5.1 chip supporting both SPP + BLE dual-mode, offering stable wireless connectivity to electronic medicine boxes with its SOP8 packaging (pin pitch 1.27mm) and lightweight design.

Key specifications include:

Flexible Dual Mode Switching: Supports both BLE (Low Energy) and SPP (Classic Bluetooth), switchable via AT commands (B4/B5). This allows compatibility with different devices, such as mobile apps using BLE and medical terminals utilizing SPP.

Optimized for Low Power Consumption: The standard KT6368A consumes around 6mA in connection state; the low-power version KT6328A (BLE only) has an average broadcasting current of just 100uA at a broadcast interval of 1000ms, significantly extending battery life.

Stable Communication Performance: With a 24M crystal oscillator (load capacitance 12pF, frequency deviation ≤±10ppm), it ensures RF stability, covering communication distances up to 15 meters, and supports adjusting RF power through AT+BR command (levels 0-9) to fit various environments.

Critical Applications in Electronic Medicine Boxes

Real-time Medication Data Synchronization: After establishing a BLE connection with a mobile app, the medicine box can upload medication records (time, dosage) to the app via UUID "FFF1" characteristics, supporting single packet data transmission of 1024 bytes. MTU negotiation enables bulk file transfers, e.g., historical records synchronization.

Remote Control and Status Query: Users can remotely operate the device via the app:Send “AT+BM” to change the Bluetooth name (e.g., “Grandma’s Medicine Box”)Adjust broadcast intervals by sending “AT+UT” (balancing between power consumption and connection speed)Receive status feedback from the medicine box through “FFF2” characteristics (e.g., “20% Remaining Medication”)

Security and Compatibility Design: Password protection via AT+BE command (4-digit numeric password) prevents unauthorized access in SPP mode. The MAC address embedded in advertising packets solves iOS's inability to directly obtain MAC addresses, facilitating unique device identification.

Advantages in Development and Mass Production

Simplified AT Command Set: Supports quick configuration for common functionalities (e.g., setting baud rate to 115200 with “AT+CT05”, resetting to factory defaults with “AT+CW”), eliminating complex protocol development.

Hardware Design Reference: External antenna wiring is sufficient (length should match PCB layout); recommended crystal oscillators include 3225 package (cost-effective) or M49 (high stability), requiring no additional matching capacitors.

Mass Production Support: Provides Bluetooth test equipment for frequency offset detection (qualified range ±20KHz) and supports tape-and-reel packaging (1000 pieces per reel), suitable for SMT production lines.

Learn more about KT6368A here.

[blevoice]

JL(JieLi) Bluetooth TEST Box Dial Switch Function Description

Dial Switch Function Description

Default Advanced Audio Testing

Call Testing When enabled, the test box connects to the prototype phone's audio, allowing call testing to be performed.

Call Microphone Loopback Testing When enabled, speaking into the prototype's microphone sends audio to the test box, which then relays it back to the prototype, and the prototype's speaker plays the audio.

Quick Testing When enabled, upon connecting to the prototype, the test box triggers the prototype to enter quick test mode. In this mode, the prototype activates its speakerphone function. Speaking into the prototype's microphone results in the sound being played through the speaker. Pressing a key on the prototype plays a key tone. Note: This feature requires the prototype to be on ac690x_sdk2011 or higher. Users must add an indicator light to the prototype to signal entry into this mode, depending on the prototype's configuration.

Frequency Offset Testing When enabled, connecting to the prototype initiates frequency offset testing.

Automatic Frequency Offset Correction When enabled, automatic correction is performed during the frequency offset testing process.

[blevoice]

Introduction to the Design Scheme of Intelligent Electronic Lock Voice Interaction System Based on KT148A Voice Chip

I. Scheme Background and Requirements

In the field of smart home security, intelligent electronic locks have evolved from simple "unlocking tools" to "human-computer interaction terminals". Users have increasingly high requirements for the timeliness, scenario adaptability, and system stability of voice feedback. As a cost-effective 32-bit DSP voice chip, KT148A, with its low power consumption, small package, reprogrammability, and flexible control methods, can perfectly meet the voice interaction needs of intelligent electronic locks. It provides users with clear operation guidance and status prompts while helping manufacturers reduce development costs.

Core Design Requirements

Scenario-based voice feedback: Covering 10+ core scenarios such as successful unlocking, wrong password, low battery, and anti-pry alarm, realizing "prompt upon operation";

Compatibility with multiple control methods: Supporting one-wire serial port, button trigger, and MCU command control to adapt to mainstream hardware architectures of electronic locks;

Low power consumption and long battery life: Adapting to battery-powered scenarios, with standby power consumption below 30μA to ensure a battery life of more than 12 months;

Flexible voice update: Supporting users to update voice content (such as brand-customized prompts and multi-language switching) through serial ports later without returning to the factory;

Compact hardware design: SOP8 small package adapts to the limited space inside the electronic lock without requiring additional power amplifier circuits.

II. Hardware System Design

Core Configuration of Voice Module

Chip Selection: The KT148A in SOP8 package, with an operating voltage of 2.0V-5.5V, can directly share the 3.3V power supply with the main control MCU of the electronic lock without an additional power management chip;

Storage Configuration: Built-in 420KByte storage space, which can store about 420 seconds of voice (calculated at 8KHz sampling rate), enough to accommodate more than 20 scene prompts (such as "Please enter password" and "Fingerprint verification failed"), without external storage;

Audio Output: Built-in 16-bit PWM output, which can directly drive an 8Ω/0.5W speaker without an external power amplifier, simplifying the circuit design; a 105 filter capacitor (refer to the reference circuit in Section 2.4 of the manual) can be used to optimize sound quality and reduce noise.

Implementation of Voice Interaction Function

Adaptation to Multiple Control Methods

One-Wire Serial Control: Realize command transmission through a single IO line (such as sending 0x01 to trigger "Unlocking successful"), saving IO resources of the main control MCU of the electronic lock; the communication timing strictly follows the "6ms initial low level + 8-bit data" rule (Section 3.1 of the manual) to ensure stable command transmission;

Button Trigger: Use the PB0 pin (KEY function) to design physical buttons, supporting short press to trigger "volume adjustment" and long press to trigger "voice mode switching" (such as switching between Chinese and English prompts);

MCU Linkage Control: The main control obtains the playback status through detecting the PB9 pin (BUSY signal) of KT148A (low level during playback, high level when idle), and synchronously controls the lock body motor and LED indicator (for example, when playing "Unlocking in progress", the motor synchronously performs the unlocking action).

Power Supply and Power Consumption Optimization

Wide Voltage Adaptation: When powered by a battery (3.7V lithium battery), it is directly connected to the VBAT pin (Pin8) without an additional voltage stabilizing circuit; if a 2.0V-3.5V low-voltage power supply is used, VBAT and VDDIO (Pin7) must be shorted (Section 2.1 of the manual);

Low Power Consumption Strategy: Automatically enter standby mode (power consumption <25μA) in non-working periods, and enter ultra-low voltage mode (1.7μA, triggered by F0 command) after 5 seconds of inactivity, greatly extending battery life.

III. Software Function Implementation

1. Voice Content Management and Scenario Adaptation

Classification Design of Voice Library

Operation guidance: "Please enter password", "Please place your fingerprint", "Verification successful, unlocking in progress";

Status prompt: "Low battery, please replace", "Wrong password, 2 attempts remaining", "Pry-proof alarm, please note";

Extended function: "Mute mode enabled", "Temporary password activated".

Playback Mode Configuration

Insertion priority: Emergency scenarios (such as anti-pry alarm) can interrupt the current playback and trigger the alarm sound first (stop the current playback by sending 0xFE, then send the alarm command);

Loop playback: The low battery prompt adopts the loop mode (send the F2 command 20ms after sending the voice command, Section 4.1 of the manual) until the user replaces the battery.

2. Voice Update and Debugging

User-independent update: Connect the chip's RX/TX pins (Pin2/Pin3) through a USB-to-TTL module, to download audio files, supporting brand owners to update voice packs later (such as holiday greetings);

Debugging convenience: Monitor the playback status through the BUSY pin, and use a logic analyzer to verify the one-wire serial timing (25ms command interval is recommended, Section 3.2 of the manual) to reduce development and troubleshooting time.

3. Low Power Consumption and Stability Assurance

Dynamic power consumption control: Enter ultra-low voltage mode through the F0 command during non-interactive periods. When the main control MCU needs to wake up, it only needs to pull the DATA line low for 10ms (Section 4.3 of the manual);

Power fluctuation protection: Connect a 105 capacitor externally to the VBAT pin (reference circuit in Section 2.4 of the manual) to avoid voltage fluctuations during speaker operation affecting the stability of the main control.

IV. Core Advantages of the Scheme

1. Cost and Space Optimization

High cost performance: Compared with traditional OTP voice chips, KT148A supports reprogramming (no one-time burning required), reducing trial production costs; built-in storage and power amplifier functions reduce peripheral components, and BOM costs are reduced by about 20%;

Small package adaptation: The SOP8 package (size about 5mm×6mm) can be directly embedded in the electronic lock main board, adapting to compact structure design.

2. Usability and Expandability

Flexible voice customization: Users can replace voices by themselves through serial port tools (no professional equipment required), supporting multi-language package switching (such as Chinese/English/dialect), adapting to the global market;

Function expandability: The voice address can be expanded through the F4 command (Section 4.5 of the manual), supporting more than 223 voices to meet the complex scenario needs of high-end electronic locks.

3. Low Power Consumption and Reliability

Battery life advantage: Standby power consumption is 25μA, ultra-low voltage mode is 1.7μA, and 18-month battery life can be achieved with a 4000mAh lithium battery;

Industrial-grade stability: Operating temperature is -40℃~+85℃, ESD contact discharge is 4kV (FAQ 8 of the manual), adapting to extreme environments such as humidity and high temperature.

V. Application Scenario Expansion

Temporary authorization prompt: When a tenant obtains a temporary password through the APP, trigger the voice prompt "Temporary password has been activated, valid for 24 hours";

Anti-pry linkage alarm: Cooperate with a vibration sensor to trigger the voice "Pry-proof alarm, synchronized to the mobile phone" and link the main control to send alarm information to the user's mobile phone through the one-wire serial port;

OTA voice upgrade: Receive voice packs through the electronic lock's WiFi module, then forward them to KT148A through UART to realize "voice update without disassembling the machine".

VI. Summary

With "low cost, low power consumption, and easy development" as its core advantages, the KT148A voice chip provides a complete solution for intelligent electronic locks from "basic voice prompts" to "scenario-based interaction". Its flexible control methods, customizable voice content, and compact hardware design can not only meet users' needs for interaction experience but also help manufacturers shorten the development cycle and reduce costs. In the future, combined with technologies such as voiceprint recognition, it can also expand innovative functions of "voiceprint unlocking + voice feedback" to further enhance product competitiveness.

Target Customer Groups

Intelligent electronic lock manufacturers, smart home system integrators, security equipment solution providers.

[blevoice]

KT148A Voice Chip - Core Solution for Smart Voice Interaction in Electronic Pill Boxes

I. Core Chip Features: Voice Capabilities Tailored for Electronic Pill Boxes

As a 32-bit DSP voice chip, KT148A, with its SOP8 compact package (4.7mm×5.1mm) and cost-effectiveness, is an ideal choice for voice interaction in electronic pill boxes. Its core parameters are fully adapted to medical device requirements:

Storage and Battery Life Balance: Built-in 420KByte storage supports up to 420 seconds of voice content (at 8KHz sampling rate), capable of storing multi-language medication reminders (e.g., "Time to take medicine", "Insufficient medicine"); standby current is as low as 25uA, and ultra-low voltage mode (triggered by F0 command) consumes only 1.7uA, enabling over 6 months of battery life with a button cell.

Hardware Driving Capability: 16-bit PWM output directly drives an 8Ω/0.5W speaker without an external power amplifier; operating voltage ranges from 2.0V to 5.5V, compatible with lithium batteries (3.3V-4.2V) and dry cell power supplies.

Industrial-grade Reliability: Operating temperature -40℃~85℃, with 4kV ESD contact discharge resistance, meeting the stability requirements of medical devices.

II. Key Applications in Electronic Pill Boxes

Precise Medication Reminders Through the one-wire communication protocol (6ms low-level start signal + 8-bit data transmission), KT148A can receive MCU trigger commands and play voice prompts at preset times. It supports "interrupt playback" - if the user does not respond promptly, the F2 command can realize cyclic reminders until confirmation.

Real-time Operation Feedback Combined with the pill box's lid sensor and margin detection circuit, KT148A can output scenario-based voice in real-time:

Flexible Voice Customization Users can update voice content independently via PC tools: convert WAV files to F1A format, connect to the chip's PB1/RX pin via a USB-TTL module (CH340G), and complete programming in download mode (Pin5 grounded during power-up) without professional equipment. Supports 224 voice addresses, expandable to more via F4 command (e.g., multi-language versions).

III. Advantages in Development and Mass Production

Minimal Circuit Design: The reference circuit only requires an external 105 filter capacitor (VDDIO pin) and 1K current-limiting resistor (communication pin), reducing PCB area requirements.

Quick Debugging Support: Provides logic analyzer waveform examples (e.g., 0x01 command waveform) and MCU reference code (one-wire sending function) to shorten development cycles.

Mass Production Guarantee: Supports batch pre-programming of voice content, and provides test boards (with 8Ω speakers) for functional verification before delivery, with a defect rate below 0.1%.

[blevoice]

JL (Jieli) Bluetooth Test Box Comprehensive Guide: Key Steps & Practical Operation

As a leader in Bluetooth audio solutions, Zhuhai Jieli Technology's Bluetooth Test Box is an essential tool for development and production. This guide provides complete operational instructions to streamline your Bluetooth chip testing.

Core Features Overview

The JL (Jieli) Bluetooth Test Box offers:

Dual-device parallel testing capability

A2DP audio playback testing

HFP call function testing

Frequency offset testing with auto-calibration

Wireless firmware upgrade

Rapid test mode

Step-by-Step Operation Guide

1. Power Connection & Initial Setup

Use included 9V power adapter

Verify "Searching" status on both channels upon startup

Confirm correct Bluetooth name display for DUT (Device Under Test)

2. Critical DIP Switch Settings

(Requires reboot after adjustment)

3. Button Functions

Reset: Typically unused

Device B Next: Cycles through music→call→disconnect

Device A Next: Same for second device

Disconnect: Hold while connecting PC cable for config mode

4. Frequency Offset Standards

Real-time offset value displayed

Pass Criteria: Must maintain ±20KHz range

Auto-calibration (Switch 5) optimizes automatically

5. Configuration Tool Workflow

Enter config mode (Hold Button4 + PC cable)

Access CD drive in "My Computer"

Launch bt_test_box.exe

Key parameters:Minimum detectable signal (adjust range)Target device name (accelerates pairing)Max TX power (connection stability)

6. Wireless Upgrade Methods

Method 1: SD Card

Pre-configure target device name

Insert SD card with .bfu file

Auto-upgrades upon connection

Method 2: PC Bluetooth

Navigate to "Device Upgrade" in config mode

Select device or specify Bluetooth name

Load .bfu file to initiate

Troubleshooting Guide

Upgrade Failures:

Display Issues:

Audio File Update:

Pro Tips

Enable both Switch 4 & 5 for precision frequency tests

Maintain 4+ standby devices for batch testing efficiency

Quick test mode requires AC690x_SDK2011+ firmware

For complete technical documentation including:

Detailed user manuals

Schematics & reference designs

Debugging guides

FAQs

Visit our AliExpress store [BLE Voice Store] or contact our engineering team:

📧 info@blevoice.com 📱 +86 159 0279 7635 (WhatsApp/WeChat)

#BluetoothTechnology #AudioEngineering #HardwareTesting #JieliTech #EngineeringSolutions

[blevoice]

KT6368A BLE Bluetooth Chip Application Case Study in Smart Home Scenarios: Smart Lighting Control System

1. Introduction to KT6368A Chip

The KT6368A is a high-performance Bluetooth 5.1 dual-mode module supporting both BLE and SPP protocols. It features low power consumption, high sensitivity, and long-range transmission. Key specifications from the user manual include:

Frequency range: 2.402GHz–2.480GHz

Transmit power: Up to 8dBm

Receiver sensitivity: -94dBm

UART interface communication

Core architecture: 32-bit RISC-V @48MHz

On-chip memory: 64KB SRAM

Configurable via AT commands

These characteristics make it ideal for various smart home applications.

2. Smart Lighting Control System

Use Case: Control home lighting via smartphone app or voice assistant

Implementation:

Integrate KT6368A into smart bulbs or switches

Direct Bluetooth connection from a smartphone or via a gateway

Receive control commands to adjust brightness, color temperature, etc.

Advantages:

Low power consumption for always-on devices

Fast response (<100ms latency)

Supports group control for multiple lights

Reference: Similar to Philips Hue but with a lower-cost solution using KT6368A

3. Smart Lighting System Setup

Hardware Connection:

Software Development:

// Example: Lighting control logic void handle_ble_command(uint8_t cmd, uint8_t value) { switch(cmd) { case CMD_BRIGHTNESS: set_pwm_duty(value); // Adjust brightness break; case CMD_COLOR_TEMP: adjust_color_temp(value); // Modify color temperature break; // Other commands... } }

AT Command Configuration:

AT+NAME SmartBulb_01 // Set device name AT+ROLE=SLAVE // Slave mode AT+ADVINT=500 // 500ms advertising interval

Mobile App Development:Use Android/iOS Bluetooth APIs to connect to KT6368AImplement control UI and scene modes

4. Key Benefits

Cost-Effective: 30% lower hardware cost vs. Wi-Fi solutions

Easy Deployment: No complex network setup; user-friendly installation

Low Power: Ideal for battery-operated devices (extended lifespan)

High Compatibility: Works with major platforms (e.g., HomeKit, Tmall Genie)

Developer-Friendly: Full SDK and documentation accelerate time-to-market

5. Market Feedback

Data from an ODM manufacturer:

25% reduction in production cost for KT6368A-based products

99.3% first-time pairing success rate

15m average range in real-world smart home environments

40% fewer customer complaints compared to previous solutions

6. Future Trends

Bluetooth Mesh for larger-scale networks

Rental-friendly smart home solutions (plug-and-play)

UWB integration for indoor positioning

Edge computing to enable local automations without cloud dependency

The KT6368A, with its balanced performance and cost, is becoming a mainstream choice for Bluetooth-enabled smart home devices, providing reliable wireless connectivity.

[blevoice]

BT401 Manual Burning for Small Batches! #voicetechnology #audio #blueto...

[blevoice]

What if the built-in 320KB space of KT142C voice chip is insufficient? Are there alternative solutions available?

The KT142C voice chip has a built-in storage capacity of 320KB. For details, please refer to Section 4.3 of the chip manual as shown in the diagram below.

Here's a detailed explanation of why it's 320KB:

The KT142C chip actually contains 512KB of internal space, which is allocated as follows:

A portion is used to store program firmware

Another portion serves as memory storage space

The remaining space is what users can freely utilize for voice storage

→ No additional space can be freed up

If the 320KB capacity doesn't meet your requirements, the only option is to adopt an external flash solution, where the available space depends entirely on the capacity of the external flash chip.

Advantages:

Storage capacity can be freely expanded

Disadvantages:

Requires an additional flash chip

Increases BOM cost

→ That's the only drawback

For more details, please review the "KT142F" chip solution.

[blevoice]

Industrial Safety Alert Voice Chip Selection Guide: KT148A for Gas Leak Detection Applications

Introduction: The Need for Voice in Industrial Safety

In high-risk industries like chemicals, petroleum, and mining, 90% of major accidents begin with gas leaks. Traditional audible/visual alarms suffer from two critical flaws: 1) Delayed response, and 2) Ambiguous alerts. When personnel hear an alarm but cannot quickly identify the specific hazard, precious emergency response time is wasted.

The KT148A voice chip addresses these challenges as a next-generation industrial safety solution, reducing response times by over 60% through precise voice announcements. This article provides an in-depth technical analysis of its advantages and selection criteria.

1. Core Advantages of KT148A

1.1 Industrial-Grade Reliability

Wide temperature range: Operates from -40°C to 85°C, suitable for refinery environments

EMC-resistant design: Built-in 120MHz PLL clock, tested for chemical plant EMI conditions

Corrosion-resistant packaging: SOP8 package surface coating treatment, resistant to H₂S and other corrosive gases

1.2 Intelligent Voice Alert System

// Example: Sequential playback (F3 command) void gas_alert_play(u8 gas_type)

{

oneline_send_one_data(0xF3);

// Combination play command udelay(20); oneline_send_one_data(0x01);

// "Warning!" udelay(20); oneline_send_one_data(gas_type);

// Gas-specific alert udelay(20); oneline_send_one_data(0x10);

// "Concentration exceeded"

}

Supports 224 voice segments (expandable via F4 command) for multi-level alerts (Notice/Warning/Critical).

1.3 Key Performance Metrics

2. Implementation in Gas Detection Systems

2.1 System Architecture

[Gas Sensor Array] → [MCU] → [KT148A] → [Explosion-Proof Speaker]

↑         ↖ Wake-up Signal

[Emergency Button] [Power Management]

2.2 Critical Features

Instant interrupt capability: Overrides current playback for higher-priority alerts

// Stop current playback for emergency alert  oneline_send_one_data(0xFE);  

// Stop command  udelay(20);  oneline_send_one_data(0x03);  

// "Explosive gas detected!"

Multilingual support: F4 command enables 500+ voice addresses

F4 01 F0 → Chinese alert

F4 02 F0 → English alert

Ultra-low power: 1.7μA standby current enables 10-year battery life

3. Comparative Selection Guide

3.1 Competitive Analysis

3.2 Selection Flowchart

Requires field voice updates?

├─ Yes → Choose KT148A/WT2003H4

│   ├─ Needs long recordings → KT148A

│   └─ Needs DAC output → WT2003H4

└─ No → Evaluate OTP cost

4. Implementation Best Practices

Audio Processing Standards:

🔹Sample rate: 16kHz/16bit (balance quality vs. space)

🔹Leading silence: <50ms (ensures fast response)

🔹Naming convention: GAS_H2S_WARNING.f1a

Hardware Design Tips:

🔹Power filtering: Mandatory 47μF electrolytic + 100nF ceramic capacitor

🔹PCB layout: Keep <5cm between KT148A and MCU

🔹Reverse polarity protection: Add 1N5819 diode

Field alidation Checklist:

🔹Continuous playback test at 85°C

🔹Priority testing with mixed gas scenarios

🔹SPL attenuation test with explosion-proof housing

5. Success Story

After deploying KT148A solutions, a multinational chemical company achieved:

🔹68% faster emergency response

🔹42% reduction in human errors

🔹100,000 hours MTBF

"During H₂S leaks, clear voice instructions save more lives than flashing lights." — Site Safety Manager

Conclusion

The KT148A redefines industrial safety standards with its reprogrammability, ruggedness, and instant response.

Request our full reference design kit including:

🔹Safety certification guidelines

🔹Multilingual voice libraries

🔹Production programming tools

Contact our technical team for customized solutions:

info@blevoice.com |  +86 159 0279 7635 (WhatsApp)

#IndustrialSafety #GasDetection #VoiceChip #ProcessSafety #IoT

[blevoice]

KT1025A BT201 Audio Bluetooth Module: Debugging Record of Bluetooth Audio Chip Recording Noise Issues

Recently, we received feedback from a Hungarian customer that there was a "buzzing/humming noise" when playing back recorded audio files (copied from the TF card to a computer) using the KT1025A BT201 test board. We collaborated with the client to debug and identify the issue, and finally solved it perfectly. Here is the record of the process.

Feedback

The customer reported the issue of "buzzing sound when playing audio files on a PC".

I. Restore the Customer's Test Scenario

Test Environment

The PC is connected to the KT1025 BT201 Module via the serial port to send operation instructions.

Insert the SD card into the Module to store the audio file.

The USB interface of the PC is connected to the Module's USB for power supply.

Test Steps

Use the serial port debugging tool on the PC to send commands for starting, pausing, and stopping the recording to the Module, and record a piece of sound.

Unplug the SD card from the Module and insert it into the PC.

Play the audio files on the SD card on the PC.

Test Result

There is a buzzing sound when playing audio files on the PC.

Other Attempts

Change the power supply mode of the module to battery power, disconnect the serial communication line, and shorten the microphone input at the same time. Similarly, there is a buzzing sound when the PC plays the recorded file.

II. Investigation Process

First, I conducted the test according to the above - mentioned method and recorded a video of the test process. The result was that there was no buzzing sound when playing the recorded file on the PC.

Test Peripheral Accessories and Tools

Mic (Model: XHXDZ - 4015, 4 * 1.5mm, 1.46KΩ, 1 - 10V, 150 - 500μA)

UartAssist V5.0.10 (BR:115200)

USB TO TTL (CH340G): For power supply and serial communication

III. Further Investigation in Collaboration with the Customer

Check the Power Supply

Based on the customer's findings:

1.Powering with 4 AA batteries results in a buzzing sound. 4 AA batteries (1.5V * 4) can reach 6V, which exceeds the specified power supply range.

2. Powering with 3 AA batteries eliminates the buzzing sound. 3 AA batteries (1.5V * 3) provide 4.5V, which is within the specified power supply range.

So, the root cause has been identified - the issue lies in the chip's power supply.

Design Principles Related to the Chip's Power Supply Voltage

The chip includes a built - in LDO that outputs 3.3V via PIN12, enabling it to power peripheral circuits, though this is not typically recommended.

Thanks to the built - in LDO, the chip supports a wide power supply voltage range, from as high as 5V (or even 5.2V) down to 3.2V, and can operate at a minimum of 2.9V in extreme cases.

Allowing up to 5V ensures redundancy and stability for the chip's internal 3.3V LDO supply while accommodating compatibility with peripheral circuits that may share the same power source.

Question 20 in the document "BT201_Frequently Asked Questions_FAQ_V3_Updated to 43" in the technical resources package for the 【KT1025A Bluetooth Chip】 also provides details about the chip's power supply specifications. A screenshot is included below.

By the way, our KT1025 BT201 Module has been sold in the domestic market of China for several years, with tens of thousands of shipments. I say this to tell you that you don't need to worry about its quality and reliability.

#BluetoothAudioChip #RecordingNoise #KT1025A #DebuggingRecord

[blevoice]

Development Record of SC5080B SOP8 Voice Chip Replacement with KT148A Flash Type 420s

Bluetooth Technical | Audio Products | AIoT Solutions | Bluetooth Wireless Engineerings | Embedded Systems | Voice chips | Bluetooth Chips | Bluetooth Audio Chips | Sound Playback

Replacement Introduction

The package of SC5080B is SOP8. The customer feedback indicates that the chip has been out of production, so we need to use the KT148A voice chip to replace and upgrade the original chip solution. After all, flash-type voice chips have natural advantages in use and modification.

Basic Specifications of SC5080B Voice Chip

SC5080B is a newly launched multi-function single-chip 4-bit CMOS controller voice chip, which provides 4-channel voice/Midi synthesis function. The voice synthesis method adopts the advanced high-fidelity ADPCM algorithm, and the maximum sampling rate can reach CD quality of 44.1kHz. The hardware has 16-level volume control.

It has 3 I/O inputs and outputs, two audio output methods, PWM output and DAC output, with a precise internal oscillation of +/-1%. There is no need to add an external oscillator. It has ultra-low power standby and simple programming functions.

It is a one-time programmable (OTP) voice chip with few peripheral components, low cost, stable performance, strong anti-interference and simple control. At a sampling frequency of 6KHz, it can record a maximum of 80 seconds of voice and chord MIDI music. It has two control modes, button mode and one-wire serial control mode, and can be divided into a maximum of 255 segments of voice. Different voice materials can be written into the chip ROM.

Application fields: electronic organs, advanced toys, children's learning machines, anti-theft devices, smart home appliances, health care and physiotherapy products, instruments and meters, and various automatic control systems.

Development Record of the Replacement Process

Hardware Aspect

The pin definitions are different. The power supply pin of KT148A is pin 8, while that of SC5080B is pin 7. For the one-wire communication pin, KT148A uses pin 3, while SC5080B uses pin 4. Therefore, the hardware side must be modified and cannot be pin-to-pin.

Software Aspect

There is a problem with the software communication timing, which is reflected in the timing level length. The customer's MCU sending 1ms and 2ms pulse widths to KT148A cannot play. Finally, by modifying the one-line receiving part program of KT148A, this problem is perfectly solved.

The rest is pretty much the same; no real difference.

Actual testing showed that when the customer's MCU sends 1ms or 2ms pulse widths to the KT148A, playback does not work.

After hands-on testing with a logic analyzer, the findings were as follows:

Finally, by modifying the one-wire receiver program of the KT148A, the issue was perfectly resolved.

Actual measured results after the fix:

Related Expansions

Applications of Voice Chips in Smart Home Appliances: It can realize the voice control of smart home appliances, such as controlling the switch and adjusting functions. For example, smart fans can control the switch and wind speed gear switching through voice commands.

About KT148A: KT148A is developed by Shenzhen Qingyue Electronics Co., Ltd. It is a 32-bit DSP voice chip with a standard SOP8 package. It has a built-in 420KByte voice space, can support a maximum voice length of 420 seconds, supports multi-segment voice broadcasting, can directly drive a 0.5W speaker, and users can replace the voice content by themselves. The one-wire serial control mode is convenient to operate and has a low cost.

#VoiceChip #SC5080B #KT148A #VoiceChipReplacement #SmartHomeApplianceApplications

[blevoice]

Application of KT148A Voice Chip in Segmented Fields such as Electronic Music Cards, E-Cards and E-Invitations

I、Introduction

With the explosion of personalized demands in consumer electronics, segmented products such as electronic music cards, e-cards and e-invitations are upgrading from traditional static forms to dynamic interactive experiences. As a cost-effective 32-bit DSP voice chip, KT148A provides an ideal solution for such scenarios with its flexible voice customization capability, low-power design and minimalist hardware interface. This article deeply analyzes the chip characteristics, application scenarios and technical implementations.

II、Core Advantages of KT148A Chip for Interactive Voice Scenarios

KT148A adopts a standard SOP8 package but integrates voice processing capabilities far exceeding similar products: the built-in 420KB storage space can accommodate up to 420 seconds of voice content (up to 400 seconds at 8KHz sampling), and the design of directly driving an 8Ω/0.5W speaker eliminates the need for an external power amplifier circuit, greatly simplifying the hardware layout of card-type products. Its unique technical advantages are particularly prominent in segmented scenarios:

2.1 High Cost-performance Ratio and Reprogrammable Feature

Compared with traditional OTP voice chips, KT148A reduces costs through improved manufacturing processes and supports users to replace voice content by themselves via the serial port. This feature is crucial for small-batch customization scenarios—for example, wedding invitations can quickly update blessing voices according to different couples' needs without re-taping.

2.2 Minimalist Hardware Interface and Low-power Design

The chip adopts a one-wire serial communication protocol, completing voice control with only one data line. Combined with the key triggering function of the PB0 pin (playback by grounding), it realizes the minimalist interaction of sound activation when the card is opened. In terms of power consumption control, the current consumption in standby state is only 25μA, and the ultra-low power mode of 1.7μA entered by the F0 command allows electronic cards to stand by for months under button battery power supply.

2.3 Flexible Voice Management Function

It supports 224 voice segment addresses (expandable to more via the F4 command), meeting the multi-voice segment requirements of complex scenarios. For example, music cards can store multiple pieces of music, triggered for playback by different keys; the F2 loop playback and F3 combined playback commands enable seamless connection between blessing voices and background music.

III、Application Solutions and Innovative Designs in Segmented Scenarios

3.1 Electronic Music Cards: Experience Upgrade from Static to Dynamic

Traditional music cards mostly use pre-recorded voice chips with fixed and unupdatable content. The KT148A solution breaks through this limitation:

• Hardware Implementation: Ground the PB0 pin through a touch switch. When the card is opened, the trigger circuit is turned on, and the chip automatically plays the preset voice; SPK1/SPK2 are directly connected to a miniature speaker without an additional amplifier circuit.

• Voice Customization: Users can convert WAV format audio to F1A format through PC tools and download it to the chip via a CH340G USB-to-TTL module. For example, festival cards can record personalized blessings, and birthday cards can add customized songs.

• Low-power Optimization: After playback, the chip automatically enters a 25μA standby state, achieving a standby time of more than 6 months with a CR2032 battery.

3.2 Interactive E-cards: Multi-segment Voice and Scene Linkage

In high-end greeting card scenarios, the combined playback function of KT148A creates a hierarchical voice experience:

• F3 Command Application: Sending the F3+0x01+0x02+0x03 command plays three segments in sequence: "welcome message → blessing message → background music", with an interval of about 20ms between segments to create a smooth voice narrative chain.

• Dynamic Volume Adjustment: 15-level volume control is realized through the 0xE0-0xEF command. For example, wedding invitations can set medium volume (0xE8) in indoor environments to avoid excessive sound affecting the experience.

• Address Extension Application: For greeting cards needing to store multiple pieces of music, the F4 command can extend the address. For example, sending F4 01 23 (0x123=291) plays the 291st voice.

3.3 E-invitations: Integration of Personalized Voice and Minimalist Hardware

As a high-end etiquette carrier, e-invitations have higher requirements for sound quality and reliability:

• Sound Quality Optimization: It is recommended to convert audio with a 16KHz sampling rate and 6Kbps bit rate. About 200 seconds of high-quality voice can be stored in 420KB space to meet the needs of complete invitation words and background music.

• Anti-interference Design: Series a 1KΩ resistor between the PB1 data pin and the MCU to match the 3.3V TTL level, avoiding signal interference when the card is folded.

• Mass Production Solution: By contacting the customer service, the customized voice can be written into the pre-factory program at one time and burned into the chip along with the program burning, achieving batch customization of voice and solving the efficiency problem of mass production.

IV、Key Points of Technical Implementation and Debugging Guide

4.1 Core Points of Hardware Design

• Power Connection Strategy: Directly connect VBAT (Pin8) when using a 3.7V lithium battery. If using a 2-3V button battery, short Pin7 (VDDIO) and Pin8 to ensure the chip works stably at low voltage.

• Download Mode Activation: When updating the voice, ground SPK1 (Pin5) before power supply, and release it after hearing a "beep" to enter the download mode.

• Speaker Matching: Choose an 8Ω/0.5W miniature speaker first. If the volume is insufficient, replace it with an 8Ω/1W model, and the chip driving capability is compatible with this load.

4.2 Practice of One-wire Communication Protocol

The one-wire communication of KT148A adopts a unique pulse width encoding:/ One-wire data sending example (play the 5th voice) void play_voice5() { oneline_send_one_data(0x05); // Send voice address 0x05 } // Loop playback implementation void loop_play() { oneline_send_one_data(0x01); // First send the target voice address udelay(20); // Wait for 20ms oneline_send_one_data(0xF2); // Send loop command }

During communication, ensure that the start signal is a 6ms low level, and the data bit uses 200μs high level + 600μs low level to represent "1", and vice versa for "0", with the error controlled within 10%.

4.3 Common Problems and Solutions

V、Industry Trends and Scene Extension of KT148A

With the growth of the personalized gift market, electronic card products are evolving from single voice playback to multimodal interaction. The hardware IIC interface and UART interface of KT148A reserve space for function expansion—such as automatically detecting card opening and closing by connecting a light sensor via IIC; realizing more complex key logic through UART communication with the MCU.

In terms of cost control, the reprogrammable feature of KT148A avoids the trial-error cost of traditional OTP chips, especially suitable for e-commerce customized order scenarios. When more than 223 voice addresses are needed, the address extension scheme of the F4 command solves the massive voice storage demand at an extremely low cost, which is of great value in international business invitations requiring multilingual versions.

From the perspective of technological evolution, KT148A represents the "just right" design philosophy of voice chips in segmented fields—sufficient storage capacity, minimalist hardware interface, and power consumption control as low as 1.7μA, which exactly meets the balance requirements of electronic card products for function, cost and battery life. With subsequent firmware upgrades (such as the F4 command added in version V5), the application boundaries of this chip in segmented scenarios will continue to expand.

VI、Conclusion

With its characteristics of "small package, great capability", the KT148A voice chip provides the optimal solution from technology to cost for segmented fields such as electronic music cards, e-cards and e-invitations. Through the minimalist control of the one-wire serial port, flexible customization of reprogramming and low-power design, this chip is promoting the upgrading of traditional paper cards to intelligent interactive carriers. For hardware developers, mastering its one-wire communication protocol and voice processing process can open up new innovation space in the personalized gift market.

[blevoice]

JieLi's Commonly Shipped Chips in 2025: A Comprehensive Analysis

AIOT Chips - BLE Type

Common Issues

Involve the price, power consumption, main application markets of JieLi BLE chips, Channel Sounding Bluetooth channel detection technology, chip capacitance and compatibility test reports, Bluetooth MESH networking, existing transparent transmission protocols, Findmy function, Bluetooth version and BQB certification, module requirements, etc.

Mainstream Models and Features

AC631N: Discontinued.

AC635N: Suitable for smart home, Bluetooth version 6.0.

AC636N: Suitable for smart cities, supports high-speed 2M PHY, long-distance transmission and Bluetooth transparent transmission.

AC632N: Suitable for mobile phone/computer peripherals, master-slave integrated.

AW30N (Main Promotion): Suitable for voice remote controls, etc., supports multiple Bluetooth Profiles, Mesh1.1 networking.

AW31N (Main Promotion): Suitable for personal care and health, capacitive pens/page-turning pens, etc., supports secure connection, anti-loss/Findmy, multi-connection/multi-master and multi-slave, and the power consumption reaches the μA/nA level.

Personal Advice: For AIOT chips, it is recommended to focus on AC632N, which has relatively complete data and more comprehensive verification.

Smart Wearable Chip AC707N Series

Models

QFN32: Suitable for watches, electronic cigarettes, color screen bins, etc.

AC7076A3: Built-in 32Mb flash.

AC7076A6: Built-in 16Mb flash.

QFN42: Suitable for watches

AC7074A5: Built-in 64Mb flash.

AC7074A7: Built-in 128Mb flash.

AC7074A7S: Built-in 128Mb flash, 16Mb Psram.

Advantages in Smart Watches

32-bit dual-emission DSP, main frequency 288MHz + FPU.

2.5D hardware GPU, supports 480*480@90fps and above.

Dual-connection standby is about 140uA, single BLE connection standby is about 70uA, RTC shutdown is 5uA, soft shutdown is 2uA.

Supports AVI video playback.

Peripheral materials are simplified, with built-in power amplifier, LDO, powergate, etc.

Supports external SD nand/spi nand, built-in and external norflash.

Advantages in Smart Door Locks/Color Screen Electronic Cigarettes

Specification: QFN32 (4*4), built-in 4Mb/8Mb flash.

Specific Advantages: CPU main frequency 288MHz, RAM 283 + 32KB, built-in hardware 2.5D GPU, can achieve smooth screen refresh above 480*480 resolution and 90 frames per second and 3D stereo display; highly integrated, peripheral circuit is simplified, can save the MCU of the cigarette control part, built-in charging management, screen backlight and motor drive mos transistors, 0.5W power amplifier, low-power touch screen; supports low-power fast startup, can start quickly within 10ms in 10uA standby state; supports 12-bit ADC.

Personal Advice: For screen-equipped applications, the 701N series is preferred. The 707N series is a cost-reducing series.

Bluetooth Speaker Chips

Entry-Level: AC706N, AC696N, each with its own entry-level market advantages.

Mid-Low End Series: AC695N has brand entry-level advantages.

Mid-End Series: JL701N series.

High-End Series: JL703N series.

Personal Advice: At present, the AC696N series chips have the highest shipment volume for JieLi. The AC695N series chips are slightly more expensive but with sufficient performance for many products. The JL701N and JL703N series have good performance but relatively high prices, so they are used by relatively few people.

Bluetooth Headphone Chips

JL708N (High-End): 5-microphone adaptive hybrid-feed over-ear headphones (2FF + 2FB + 1 call), 9-microphone adaptive hybrid-feed over-ear headphones (6FF + 2FB + 1 call), high-end OWS headphones (advanced algorithms, AI large model applications, etc.), 2.4G low-latency gaming headphones (over-ear/TWS).

JL709N (Flagship): Semi-in-ear adaptive hybrid-feed ANC TWS (ultra-low power consumption, full-time adaptation), in-ear adaptive hybrid-feed ANC TWS (ultra-low power consumption, full-time adaptation), ultra-low power consumption sleep headphones, single-feed ANC over-ear headphones (3 analog microphones), ultra-low power consumption lavalier microphones (coming soon).

JL710N (Mainstream): Mainstream OWS headphones (high-power output, original virtual bass algorithm), mainstream single-feed + dual-microphone ENC TWS (dual-microphone beamforming ENC algorithm), entry-level hybrid-feed TWS (1FB + 1FF call sharing FF microphone), single-feed ANC over-ear headphones (2 analog microphones + 1 digital microphone), entry-level lavalier microphones (coming soon).

AC704N (Entry-Level): Entry-level TWS (OTP/1M/2Mbit Flash).

AC705N (Entry-Level): Entry-level true stereo headphones (OTP/1M/2Mbit Flash).

Iterative Relationship: During 2020 - 2025, each model shows an upward trend, such as JL700N upgraded to JL710N, AD697N upgraded to AC702N through P2P, JL701N upgraded to JL709N, etc.

Personal Advice: At present, the 709N series of Bluetooth headphones has the best sales. It is positioned in the mid-range for high-volume sales and has considerable performance.

Tags: #JieLiChips #AIOTChips #SmartWearableChips #BluetoothSpeakerChips #BluetoothHeadphoneChips

[blevoice]

🎙️ From OTP Woes to Flash Wonders: The KT148A - SOP8 Voice Chip Story

Ever wondered about the magic behind those voice - prompt gadgets in your daily life? Let's dive into the world of SOP8 voice chips, and how the KT148A is turning the industry on its head.

The SOP8 Voice Chip Evolution

SOP8 - packaged voice chips have been around the block. Starting from the early days with Taiwanese manufacturers like Youhua, Chi - Qi, and SoCCOM using 4 - bit machine tech in toys, they've come a long way. Thanks to domestic solution providers like Weichuang, these chips now have a standardized set of features. They're everywhere - in your blood pressure monitors, smart door locks, security alarms, and those cute electronic doorbells.

The Standardized SOP8 Features

Audio Muscle

These chips can drive an 8Ω/0.5W speaker like a pro. And if you need more oomph, just hook up an external amplifier. It's like having a sound system that can adapt to any volume need.

Control Freak's Dream

One - wire Serial Port: Think of it as a super - simple way for your chip to talk to other parts of the device. Single - byte commands, and it uses pulse width to tell 0 from 1. Ideal for those minimalist set - ups.

Two - wire Serial Port: A bit more sophisticated. The clock and data lines work together, making sure the communication is rock - solid. It's like having a reliable messenger for your chip's data.

Independent IO Trigger: One IO port, one voice segment. You can set it to play when the device powers on, trigger it once, or loop it. So much flexibility!

OTP Chips: The Old Guard's Troubles

Production Nightmares

Remember those OTP (One - Time Programmable) chips? Once you burned the program into them, that was it. If there was a mistake during mass production, the whole batch could be toast. Talk about a quality - control headache!

Development Delays

Getting an OTP chip ready was no walk in the park. You needed special voice - making tools, sound - editing software, and those fancy download and programming devices. And if your client changed their mind? Hello, long delays and extra costs as you waited for the supplier to step in.

Cost Conundrums

The more voice storage you needed, especially for high - quality, long - duration stuff, the more expensive the OTP chip got. And then there was the inventory issue - order too much, and you're stuck with useless chips. Order too little, and the cost per chip skyrockets.

Enter the KT148A - SOP8: Flash - Powered Savior

Flash Magic

The KT148A uses Flash storage, and it's a game - changer. You can burn the program as many times as you want. So, no more panicking about mistakes in production. And if the market says, "Hey, change that voice," you can do it without a hitch. Plus, it solves the inventory problem - no more dead stock!

DIY Dream

You don't need to rely on the supplier to change the voice. Just use the PC tool that comes with the KT148A, and you're good to go. It's like having the power to update your device's voice on your own terms. Say goodbye to long waiting times and hello to quick product updates!

Cost - Effective Champ

In the world of voice chips, the KT148A is a cost - saver. For voice scenarios over 40 seconds, it beats the traditional OTP chips in terms of cost. And with a whopping 420 - second storage (at 8kHz sampling), it can handle all your complex voice - prompt needs.

Easy - Peasy Development

All you need is a USB - to - TTL downloader (the CH340G is a great choice), and you can burn the program. No need for those fancy, expensive tools. It's like opening the door to voice - chip development for everyone!

Hardware 101: Using the KT148A - SOP8

Power Play

2.0 - 3.5V: Short VBAT and VDDIO, and use pin 8 for positive power.

3.5 - 5.5V: Keep VBAT and VDDIO separate. If you're using a lithium - battery, just plug it into pin 8 VBAT.

Download Dance

Connect pin 2 (PB9) to the RX of the USB - to - TTL, and pin 3 (PB1) to the TX.

Short pin 5 to the ground, power on, wait for the "beep," then let go. Now you can upload voice files using the PC tool.

Testing Time

Use a CH340G - USB - to - TTL module, hook up an 8Ω/0.5W speaker, press the DOWN - KEY, and power on. You're on your way to seeing (or rather, hearing) the KT148A in action!

So, there you have it - the journey of the KT148A - SOP8 from the pain of OTP to the promise of Flash. What kind of voice - enabled projects would you use it for? Let's chat in the comments!

#KT148A - SOP8 #VoiceChip #FlashTech #OTPChips #ElectronicsGeek

[blevoice]

Comprehensive Analysis of Jieli Chip Models and Functions: Selection Guide and Key Points

I. Overview of Jieli Chip Application Areas

Jieli chips are widely involved in 8 major areas, including headphone chips, speaker - related chips, smartwatch chips, video - related chips, health - related chips, IoT - related chips, smart toy chips, and smart mobility chips. They play a crucial role in a wide variety of electronic products, endowing different types of products with specific functions.

II. Consideration Factors for Chip Selection

(I) Product Form

Bluetooth Headphone CategoryType Sub - division: It includes TWS, OWS, neck - band sports headphones, and over - ear headphones. Different types of headphones require different chips due to their different usage scenarios and design requirements.

Bluetooth Speaker CategoryDiverse Products: There are small Bluetooth speakers, soundbar speakers, smart speakers, and the emerging Bluetooth karaoke speakers in recent years. Each type of speaker has different requirements for chip functions.

Audio Decoding CategoryProduct Characteristics and Selection: Products such as voice announcers and sound - emitting toys belong to this category. For MP3 decoding players with high - quality audio requirements, AC6082A or AD16N can be selected. For sound - emitting toys with relatively lower audio quality requirements, AD14N, AD15N, and AD17N are often used.

IoT CategoryScenario and Chip Adaptation: The application scenarios of IoT are scattered, and the products are rich. For smart home products that connect to APPs using Bluetooth, the AC632N series chips can be selected for Bluetooth BLE data transmission. For simple data transmission, the AC6328A with 8 pins is sufficient.

(II) Functional Requirements

Bluetooth Speaker CategoryFunction Refinement: Consider whether it supports functions such as AUX, U - disk, TF card, LED, digital tube, LCD screen, etc. At the same time, determine the number of chip pins according to the control and response requirements.

Bluetooth Headphone CategoryFeature Consideration: Pay attention to the headphone pairing method, operation interaction method, whether it supports noise reduction such as ENC, ANC, and single - feed or hybrid - feed. For high - end requirements, the AC700N series can be selected. The JL701N series is a headphone and speaker chip with more powerful ENC and ANC algorithms, usually used in relatively high - end headphones or smart speakers, such as in applications like ear - return, hearing - aid, noise - reduction, low - latency, and one - to - multiple connection scenarios.

(III) Performance Requirements

Sound Quality and Sound EffectsKey Parameters: It is of great importance for audio products such as Bluetooth speakers and headphones. Pay attention to Bluetooth decoding formats (SBC/AAC/LDAC/LHDC), DAC capabilities (decoding ability, SNR parameters), and the chip's noise floor. For mid - to - high - end products, supporting Hi - Res lossless decoding formats such as LDAC/LHDC can enhance the product's competitiveness.

Processing PowerIndicator Elements: It includes CPU speed and RAM size. Projects with third - party algorithms are more concerned about these. The RAM situations of different Jieli series chips vary.

Storage CapacityInternal and Extended Storage: Jieli chips often have an integrated internal Flash, which is used to store programs, prompt tones, etc. Common Flash capacities include 4Mb, 8Mb, 16Mb, 32Mb, etc. (divide by 8 to convert to bytes). If the built - in capacity is insufficient, an external Flash can be considered.

Power ConsumptionInfluencing Factors: It directly affects the product's working duration, involving startup and sleep states, as well as code operation. Power consumption data is usually not provided in the specification sheet, and an ammeter is needed for testing.

Bluetooth VersionEssential for Bluetooth Products: Determine the chip's Bluetooth version for products involving Bluetooth.

Relationship between Wafer and Performance: Chips in the same series of Jieli have the same wafer, thus the same performance. For example, in the AC695X series, AC6951C and AC6955F have the same chip frequency, RAM, and sound quality performance. When selecting, only consider whether the pin functions and performance meet the project requirements.

(IV) Cost

Relationship between Pins and Price: In the same wafer series, under the premise of meeting product functions, generally, the fewer the pins, the lower the chip price. However, this is not absolute, as models with large - volume agency sales may have a cost advantage.

(V) Supply Stability

Product LifecycleSelection Suggestion: Chips have a certain market cycle. When selecting chips, it is advisable to choose those in the prime stage of their lifecycle and that have been mass - produced to avoid problems with non - core part numbers. Since consumer electronics have a short cycle and rapid product iteration, communicate with our company in a timely manner for the latest series.

Part Number VersatilityStock Consideration: Universal part numbers have sufficient stock from the original factory because the original factory has minimum production requirements. If customers choose non - common part numbers, they must make advance stock - up plans.

(VI) Package

Impact of Package: The chip package affects space, sample production, and production convenience. For products with high - space requirements, such as TWS headphones, QFN packages can be selected to save space. However, QFN chips are less convenient for soldering samples in the engineering production process compared to SSOP packages. In mass - production SMT processes, QFN packages have higher SMT efficiency, but also require higher - end SMT machines. Jieli's commonly used packages include SOP8, SOP16, SSOP24, QFN20, QFN32, QFN40, LQFP48, and should be selected according to actual situations.

(VII) Others

Reliability and StabilityScenario Adaptation: Since the chips are mainly targeted at the consumer and IoT markets, caution should be exercised when using them in industrial or automotive - grade scenarios. Check the chip's operating temperature and humidity parameters.

Process TechnologyAdvantages of Process: The higher the chip process, the lower the performance and power consumption. The mainstream chip processes of Jieli have been upgraded to 40nm and 28nm.

#JieliChip #ChipSelection #BluetoothChip #AudioChip #IoTChip