The trigger sits on a proper bearing, and the sensor is a Hall-effect device on the PCB. The firmware was written in the Arduino IDE, and through the trigger and a rotary encoder all of its ...

The operation started with [bornach] ripping out the original PCB and replacing it with an ESP32 D1 Mini ... the right drum as a scroll wheel. The rotary X/Y controls are reminiscent of an ...

DIY Pomodoro project uses ESP32 microcontroller ... and it came with an air quality sensor.