Xiaomi gravity sensor remote control

Xiaomi gravity sensor remote control (contains schematic diagram, code)

Schematic PCB

Infrared remote control Proteus simulation circuit transmitting and receiving program

Infrared remote control Proteus simulation circuit transmitting and receiving program

Schematic PCB

Electronic dice source program list (assembly language)

Electronic dice source program list

Schematic PCB

Bluetooth power amplifier board based on TPA3110

Using TPA3110 digital power amplifier chip, the power can reach 15W, and there are two power interfaces. The Bluetooth part uses bk8000L finished module, which has good performance and affordable price. Supports button playback and pause, track switching, volume adjustment, and also supports external audio line input and microphone input. After testing the finished product, the sound quality is good, the Bluetooth connection is relatively stable, the button functions are normal, the external audio line input is normal, and the microphone calls are normal. A complete AD project file is provided, which can be modified as needed, and the BOM needs to be exported by yourself.

Schematic PCB

Design based on STM32F103 air purifier

An air purifier based on stm32f103rct6 chip can measure temperature and humidity and control fans.

Schematic PCB