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Arduino Metal Detector DIY project

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Its a simple design and just for experimenting,8 parts needed to make this simple metal detector.

Parts: 3 meteres solid copper wire,220ohm and 1kohm resistors,capacitor 100nf,one led,one passive buzzer and arduino board.

Download schematic and code here:https://www.youtube.com/watch?v=65bHCuzLgIo

My homemade power supply:https://youtu.be/Nvk8cLWGrqU
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