This build comes to us from [mircemk] who built this metal detector around an Arduino Nano and uses a method called induction balance detection to find metal.

A new Instructables page has been created to make an eco-friendly DIY metal detector using an Arduino Mega just been combined with a 3.2 inch TFT LCD ...

Building Your Own Arduino Metal Detector. If you’re interested in building your own Arduino metal detector, you’ll need a few basic components: 1.

Professional metal detectors are simple but require a bit of work to make. But you can build a pared-down handheld detector using a calculator, an AM/FM radio and some masking tape.

Arduino ADC is usable around 10/12 bits. That means it can measure up to 1024/4096 diferent voltage levels. Counting frequency instead can let you choose your own diferent measurement levels ...

To make this detector really useful, we need to take it mobile. Part IV: Powering the EMI Detector in Mobile Mode • Step 1: Carefully unplug Arduino from the USB cable.