His Mario themed Christmas Ornament uses a Silicon Labs FM972 micro controller, capacitive sensing, PWM controlled 8 bit audio, and blinky lights. The interesting part is some of the construction ...

Unlike SBCs, microcontrollers ... a capacitive moisture sensor. Again, you’ll need to interface the sensor with your ESP32 ...

The heart of the device that [Kerry] designed is based on 6 power MOSFETs, a few operational amplifiers and an Arduino compatible ATmega328p microcontroller. Sense resistors are used to measure ...