#STM32F405RGT6

[icgoodfind]

MCU STMicroelectronics #stm8s #STM8S105K4T6 #DP83848IVVX #TI #STM32 #STM32F405RGT6 #ST #chip #electronic components #ICGOODFIND

[jayakody2000lk]

Adapting HX711 modules for 3.3V Operation

The HX711 is a versatile integrated circuit (IC) designed for precision analog-to-digital (A/D) conversion, particularly suited for strain gauge load cell applications. It features a 24-bit A/D converter with a differential input stage capable of handling both single-ended and differential input signals. Additionally, this device offers adjustable gain amplification to accommodate various load cell sensitivities.

A common module based on the HX711 available in the market, including on AliExpress, is shown below. This module utilizes its internal analog supply regulator, which ensures a stable analog supply (AVDD) for the ADC and other internal components. The output voltage of the regulator (AVDD) is calculated using the following formula: VAVDD = VBG × (R1 + R2) / R2.

According to the electrical characteristics listed in the datasheet, the reference bypass voltage (VBG) is 1.25V. For the modules mentioned, R1 is set at 8.2kΩ and R2 at 20kΩ. By substituting these values into the formula, we calculate AVDD to be approximately 4.29V.

The HX711 IC operates within a voltage range of 2.6V to 5.5V. However, many HX711 modules on the market come with an internal voltage regulator that outputs approximately 4.29V. This can pose challenges when using the module with 3.3V microcontrollers. Furthermore, the datasheet specifies that the output voltage of the regulator should be at least 100mV lower than the supply voltage (VSUP), making the current regulator's output voltage incompatible with 3.3V supply voltages.

To address this, we need to ensure that AVDD is within the 2.6V to 3.2V range to make the module compatible with both 3.3V and 5V systems. After conducting some calculations, we determined that replacing R1 with 10kΩ and R2 with either 15kΩ or 12kΩ would be ideal. Using a 15kΩ resistor gives an AVDD of 3.1V, while using a 12kΩ resistor reduces it to 2.75V. In one of our experimental boards, we opted to replace R2 with a 12kΩ resistor.

As a further test, we lowered the AVDD to approximately 1.6V, and at this voltage, the HX711 still produced the correct results in our test setup. Interestingly, we observed that swapping R1 and R2 allows us to achieve an AVDD of 1.76V. To test this, we swapped R1 (8.2kΩ) and R2 (20kΩ) in one of the modules, and after applying a 5V supply, we noted that the AVDD returned at 1.65V, with the HX711 still providing correct outputs.

To evaluate the boards, we created a quick prototype using the STM32F405 MCU. In this prototype, we powered the HX711 module with 3.3V and directly connected its I/O pins to the STM32 GPIO pins.

For interaction with the module, we utilized the HX711 library provided at https://github.com/PCov3r/HX711-STM32-Library. The source code for our test firmware is available here.

After making the above modifications, all modules produce a stable output at 3.3V. We tested these modules with both 3.3V and 5V MCUs, using 5kg, 10kg, and 20kg load cells, and it operated correctly across all these combinations.

[cmxelcs]

Introduction STM32F405RGT6 for ST MCU Distributor Discover the cutting-edge STM32F405RGT6 microcontroller, where advanced technology meets versatility. Designed for enthusiasts, makers, and professionals alike, this microcontroller provides the perfect blend of performance, efficiency, and reliability. Whether you're working on robotics, automation, or IoT projects, the STM32F405RGT6 is ready to bring your ideas to life. MOQ of the ST MCU The MOQ is 100units as seen online.However,they are negotiable,if you interested with much more quantity,contact us to chat details. STM32F405RGT6 boasts a powerful ARM Cortex-M4 processor that can run at frequencies up to 168 MHz. With 1024 KB of flash memory and 256 KB of SRAM, it ensures that you can handle complex computations and multitasking with ease. Its integrated digital signal processing (DSP) capabilities enable real-time data processing, making it ideal for applications requiring high-speed calculations. IOT Solution Equipped with a rich set of interfaces, the STM32F405 allows seamless integration with a variety of peripherals. It features UART, SPI, I2C, and USB connectivity options that cater to a wide range of applications. Whether you need to connect sensors, motors, or other microcontrollers, the STM32F405RGT6 offers the flexibility you need. Plus, with support for multiple communication protocols, your projects are only limited by your imagination. In addition to its impressive specifications, this stm mcu is supported by an extensive ecosystem of development tools and resources. With various libraries, example codes, and a vibrant community, you'll have everything you need to step into the world of embedded systems development confidently. Even if you are a novice, you'll find a wealth of information to guide you in harnessing the full potential of this microcontroller. In summary, the STM32F405 is not just another microcontroller; it's a gateway to limitless possibilities. By choosing this mcu for your project, you equip yourself with a reliable and fast platform that can grow alongside your ideas. Dive into the world of embedded systems today and experience the power of STM32F405! If you interested with much more electronic components price,view here to know more about our company business. Read the full article

[wesleylam68]

USB microcontroller

I am learning about Microcontrollers, 32 bit, STM32F405RGT6, STMicroelectronics and learning aboutwhat is a microcontroller and USB microcontroller.

[mangowall]

Description: Brand: HAKRC Item Name: F405 DJI Version  Item No.: HK4530D Size:36x36mm Mounting Hole: 30.5×30.5mm  φ4mm Weight: 6g Processor: STM32F405RGT6 Gyro: MPU6000 BEC: 5V/3A ; ...

[120stillwell]

For just $37.00 HGLRC 20x20mm Micro F4 Flight Controller AIO Betaflight OSD 5V BEC for XJB F425 F428 Series FlytowerSpecification:Brand Name: HGLRCItem Name: 20x20mm Micro F4 Flight ControllerMPU: MPU6000-SPICPU: STM32F405RGT6, dual 8K.Black Box: Flash 16MInput Voltage: 2-4S Lipo Built-in Betaflight OSD to adjust PIDBEC Output: 5V@3ASize: 25x25mm board, 20mm mounting holes (M2)Weight:2.3gSupport Subs/PPM/DSMX receiver Usage: Original Parts for HGLRC XJB F425 F428 Series FlytowerPackage Included:1x Micro F4 Flight Controller

[mangowall]

Specs: Brand: HAKRC Item Name: Mini F405 DM Flight Controller Size: 31*28*8mm Installation hole distance: 20*20mm φ4mm Weight: 6g Processor: STM32F405RGT6 Gyroscope: MPU6000 BEC: 5V/3A; ...

[mangowall]

Description: Item name: MAMBA F405 MINI MK2 Flight Controller Frequency: 168MHz MCU: STM32F405RGT6 Six-axis: MPU6000 Blackbox: 16M Memory Uarts: 3 Set OSD: AT7456E BEC: 5V 1A (burst ...

[mangowall]

Specification: Brand: JHEMCU Model: GHF420AIO Item Name: 20x20mm F4 OSD FC AIO 20A 4in1 ESC Size: 30×37.5mm Mounting Hole: 20x20mm Weight: 7.9g F4 Flight Controller: CPU: STM32F405RGT6 MPU: ...

[mangowall]

Specifications:Brand: MAMBAItem name: F405 DJISize: 30.5*30.5mm, Weight: 7.5g MCU 168MHz STM32F405RGT6 32BIT IMU MPU6000 Baro NO OSD BF OSD Blackbox 16M Flash Memory ESC ...

[mangowall]

Specification: Brand: JHEMCU ESC Item Name:  GHF420AIO Size: 30×37.5mm Mounting Hole: 20x20mm Weight: 7.9g Flight Controller: CPU: STM32F405RGT6 MPU: MPU6000 ( SPI) Firmware: Betaflight ...

[mangowall]

Description: Item name: MAMBA F405 MINI MK2 Flight Controller Frequency: 168MHz MCU: STM32F405RGT6 Six-axis: MPU6000 Blackbox: 16M Memory Uarts: 3 Set OSD: AT7456E BEC: 5V 1A (burst ...

[mangowall]

Specification: Brand: JHEMCU Model: GHF420AIO Item Name: 20x20mm F4 OSD FC AIO 20A 4in1 ESC Size: 30×37.5mm Mounting Hole: 20x20mm Weight: 7.9g F4 Flight Controller: CPU: STM32F405RGT6 MPU: ...

[mangowall]

Specifications:Brand: MAMBAItem name: F405 DJISize: 30.5*30.5mm, Weight: 7.5g MCU 168MHz STM32F405RGT6 32BIT IMU MPU6000 Baro NO OSD BF OSD Blackbox 16M Flash Memory ESC ...

[mangowall]

Specification: Brand: JHEMCU ESC Item Name:  GHF420AIO Size: 30×37.5mm Mounting Hole: 20x20mm Weight: 7.9g Flight Controller: CPU: STM32F405RGT6 MPU: MPU6000 ( SPI) Firmware: Betaflight ...