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Want to automate lighting or monitor ambient light levels? Check out our latest Arduino guide on using the TEMT6000 Ambient Light Sensor.

#ArduinoTutorial #DIY #SmartLighting #Electronics #ArduinoProjects #Arduino

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Using a Knock Sensor to Detect Knocks with Arduino!

In this project, we're interfacing the KY-031 Knock Sensor with an Arduino Nano, displaying the knock count on a 16x2 LCD with I2C, and triggering an LED for visual feedback.

🔧 What You’ll Need: ✔️ Arduino Nano ✔️ KY-031 Knock Sensor Module ✔️ 16x2 LCD with I2C Interface ✔️ LED ✔️ Jumper Wires & Breadboard

💡 How It Works: The knock sensor detects vibrations, sending a signal to the Arduino. The microcontroller then updates the LCD and blinks an LED to confirm the knock was detected. Simple but effective!

🔥 Cool Applications: 🎶 DIY Drum Pad 🚪 Secret Knock Lock 🔊 Sound-Activated Projects

Check out the full tutorial and code in the tutorial!

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How to Use AHT10 High Precision Digital Temperature & Humidity Sensor with Arduino

Looking to measure temperature and humidity with high accuracy using Arduino? The AHT10 sensor is a compact, I2C-based module that provides reliable data, making it perfect for IoT projects, weather stations, and smart home automation.

What You’ll Learn: ✔️ How the AHT10 sensor works ✔️ Wiring it to an Arduino board ✔️ Writing & uploading the code to get readings ✔️ Tips for stable and accurate measurements

What You Need:

AHT10 Temperature and Humidity Sensor Module

Arduino Nano

0.96 inch SSD1306 OLED Display (128x64, I2C)

Breadboard

Connecting/Jumper Wires

Arduino Nano Cable

Download the Code & Library Arduino AHT10 Temperature and Humidity Sensor Module

Watch the full tutorial on YouTube:

Follow for more DIY electronics tutorials & Arduino projects!

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DIY Laser Tripwire Security System Using Arduino

The project consists of a laser module that continuously emits a beam aimed at a laser receiver sensor. When an object (such as a person) obstructs the laser, the receiver detects the interruption and triggers an alarm via a buzzer. This system is ideal for securing doorways, hallways, or any restricted area.

COMPONENTS REQUIRED

Arduino Uno 

Laser LED Module

Laser Receiver Sensor Module

Buzzer

Jumper wires

Breadboard

Circuit Diagram

CODE

#define LASER_PIN 7  

#define RECEIVER_PIN 8  

#define BUZZER_PIN 9  

void setup() {

  pinMode(LASER_PIN, OUTPUT);

  pinMode(RECEIVER_PIN, INPUT);

  pinMode(BUZZER_PIN, OUTPUT);

  digitalWrite(LASER_PIN, HIGH); // Laser ON

  Serial.begin(9600);

}

void loop() {

  int status = digitalRead(RECEIVER_PIN);

  if (status == 1) {  // If laser beam is blocked

    Serial.println("⚠️ Intruder Detected!");

    digitalWrite(BUZZER_PIN, HIGH);  

  } else {

    Serial.println("✅ Area Secure");

    digitalWrite(BUZZER_PIN, LOW);  

  }

  delay(500);

}

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The PAJ7620 is a highly capable gesture recognition sensor. It can detect a wide range of gestures such as up, down, left, right, forward, backward, and more. The sensor uses an array of infrared LEDs and a photodiode array to detect motion in its field of view. It communicates with a microcontroller (like Arduino) over the I2C interface, making it a versatile option for many gesture-controlled applications.

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The 12V 3A Touch Sensor Switch for Mirror Light is a sleek and modern solution for controlling mirror lights effortlessly. This touch-sensitive switch provides a user-friendly on/off functionality, enhancing convenience and adding a contemporary touch to your lighting system. The built-in indicator light offers clear status visibility, and the durable construction ensures long-lasting performance. Its simple installation process makes it an excellent choice for upgrading your lighting setup.

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DIY Sun Tracking Solar Panel Project using Arduino

Are you looking to boost the efficiency of your solar panels? A dual-axis solar tracking system is the perfect solution! Instead of a static panel, this system automatically follows the sun, ensuring maximum energy absorption throughout the day. In this blog, we'll guide you through building your own Arduino-powered solar tracker and show you how it works in action. 🎥✨

🛠️ How Does this Sun Tracking Solar Panel Project Work?

A solar tracking system adjusts the position of the solar panel in two axes (vertical & horizontal) to follow the sun’s movement. This ensures optimal solar exposure, which significantly increases power output compared to fixed panels.

Using Arduino, LDR sensors, and servo motors, we can create a system that continuously detects sunlight intensity and adjusts the panel accordingly. 🌞⚙️

🔹 Components Needed:

🔧 Arduino Uno– The brain of the system 🔧 LDR Sensors – Light intensity detectors 🔧 Servo Motors – For precise panel movement 🔧 Solar Panel – The power generator 🔧 Resistors & Jumper Wires – For connections

📝 Step-by-Step Instructions

1️⃣ Set up the Circuit: Connect LDR sensors, servo motors, and the solar panel to the Arduino. 2️⃣ Upload the Code: Use the provided Arduino sketch to program the tracker. 3️⃣ Test the System: Place it under sunlight and watch the panel follow the sun in real-time! 4️⃣ Optimize & Improve: Adjust sensor placement for better accuracy.

📌 Full Code & Circuit Diagram: https://quartzcomponents.com/blogs/electronics-projects/dual-axis-solar-tracking-system-using-arduino

🔋 Why Use a Solar Tracker?

✅ Increases energy output compared to a fixed panel ✅ Automatically adjusts for optimal sunlight exposure ✅ Enhances efficiency of solar power systems ✅ Perfect for DIY solar enthusiasts & engineers

Whether you're building a home solar system or a DIY electronics project, this Arduino solar tracker is an exciting way to improve energy efficiency!

📢 Share Your Builds!

Tried making this project? Share your solar tracker setup with us in the comments or tag us! We'd love to see your innovation. 🌍⚡

📌 Full Tutorial & Code: 👉 https://quartzcomponents.com/blogs/electronics-projects/dual-axis-solar-tracking-system-using-arduino

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Like the traditional PIR sensor, RCWL-0516 is a widely popular sensor that also detects movements and is used in Alarms or for security purposes. This sensor uses a “microwave Doppler radar” technique to detect moving objects within its range. It has a sensitivity range of ~7 meters and that is very useful for multiple applications. 

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DB9 connector is a widely used electrical connector. Recognizable by its distinctive D-shaped metal shell and 9-pin configuration, the DB9 connector has been a staple in electronics for decades, especially for serial communication.

What Is a DB9 Connector?

The DB9 connector features a D-shaped shell to ensure proper orientation when connecting. The 9 pins (or sockets in female versions) are arranged in two rows, with 5 pins on the top and 4 on the bottom. This compact design is suitable for low-profile applications.

The connector comes in two main types:

DB9 Male Connector: Have pins and are typically used on cables.

DB9 Female Connector: Have sockets and are often found on equipment or devices.

Key Features of DB9 Connectors

Durable Construction: The metal shell provides mechanical strength and shields against electromagnetic interference (EMI).

Compact Design: Ideal for devices where space is limited.

Versatile Applications: Commonly used for RS-232 serial communication, connecting peripherals like mice, keyboards, and modems.

Customization: Can support different pin configurations and wiring for varied uses.

Common Applications of DB9 Connectors

Serial Communication: Widely used in RS-232 interfaces to connect computers, printers, and industrial equipment.

Automation and Control Systems: Frequently seen in programmable logic controllers (PLCs) and industrial machines.

Networking Equipment: Used in switches, routers, and legacy systems.

Testing and Prototyping: Found in diagnostic and development tools for electronics.

DB9 Pinout Diagram

Here’s a standard pinout for a DB9 connector used in RS-232 communication:

Advantages of DB9 Connectors

Reliable Connection: Secure locking mechanism ensures a stable link.

Broad Compatibility: Works with many legacy and modern devices.

Easy Maintenance: Simple design allows for straightforward repairs or replacements.

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Whether you're building battery packs for electric vehicles, solar systems, or making energy storage systems for backup energy, LiFePO4 Battery Cells are best to deliver top-notch performance, safety, and durability. Explore of high quality selected LiFePO4 battery cells.

✅ Superior energy density ✅ Exceptional reliability ✅ Perfect for a wide range of applications

Explore now:  LiFePO4 Batteries

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You can build your own attendance system! With an ESP32, a fingerprint sensor, and a little creativity, you can create a fully functional Biometric Attendance System.

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Features

SD Card Slot: Supports standard SD and microSD cards (with adapter) for data storage.

Real-Time Clock (RTC): Includes an integrated DS1307 RTC to timestamp data accurately.

Dedicated Headers: Pin headers for easy connection to Arduino and external modules.

Reset Button: Convenient reset function for debugging and testing.

Prototyping Area: Extra space for adding custom circuits or components.

Battery Backup: Keeps the RTC running during power loss (requires CR1220 battery, not included).

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Specifications:

Voltage: 3.7 V

Capacity: 2000 mAh

Model: 523450

Battery Chemistry: Lithium Polymer

Battery Type: Rechargeable Power Battery

Dimensions: 5.2mmx34mmx50mm

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FEATURES:

4.2V/3.6V Battery Charging Module

Can Charge Lithium Ion And Lithium Phosphate Battery

Adjustable Output Current

Recommended Input Voltage: 4.5V – 7V DC

Embedded Switching Regulator

Single Battery Charger Module

Programable Charge Curren Form 0.1A to 2A

Programable Precharge Current Form 10% to 100%

LED Indication 

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Features:

4-level LED lamp display power, not working state intelligent automatic shutdown;

The built-in lithium battery protection IC, over-current, overpressure, under-voltage protection;

Dual USB output ports.

Input requirements: 5V constant voltage power supply can do charge input power, the most matching charger for 5V 1A above

Requirements for rechargeable batteries:

Compatible Batteries: 18650 batteries, cell phone batteries, flat-panel batteries, MP3 batteries, etc. 3.7v-4.2V polymer Lithium battery.