How to process analog waveform from metal detector in arduino - Programming Questions - Arduino Forum
DIY Metal Detector using Arduino step by step - Techatronic
Make a Metal Detector with Basic Electronic Components interfacing wit – REES52
Simple Metal Detector Module
Arduino metal detector
Electronic Project 40: A Metal Detector for Security Device using the principle of a tank circuit for inductive sensing and with the aid of op-amp, speaker and arduino uno — Steemit
DIY Sensitive Arduino IB METAL DETECTOR (coin from 25cm big object at 100+ cm) - Share Project - PCBWay