This project creates a metal detector using an Adafruit CLUE with a few common components and an easy-to-make coil.
The program is written in CircuitPython for version 5.1.0 or later. The code also runs on the Circuit Playground Bluefruit (CPB) with the TFT Gizmo screen. The program can be used without a screen on the CPB in audio/light mode only.
Alligator clips to male jumpers can be used with or without the Adafruit Dragontail to connect the CLUE and the coil to the breadboard. The pictures feature alternate products.
This project was inspired by an old Ray Marston book featuring a metal detector project and the Detectorists BBC TV series.