The same holds true for a lot of microcontroller designs including [rgco’s] clever metal detector that uses very little other than an Arduino. The principle of operation is simple. An Arduino ...

The project uses the Arduino IDE and a Blue Pill STM32 module. The project looks good with an LED module and a rotary encoder to set sensitivity. Pulse induction metal detectors use a single coil ...

Using motion detectors ... block any heat signatures approaching from the side. Of course you can use multiple sensors and outputs to trigger different effects depending on your needs. The Arduino ...