Build you own metal detector

Science Technology
Build you own metal detector

Here’s a pretty simple and fun metal detector you can make. It’s a BFO (beat frequency oscillator) – when metal is detected it changes the sound coming out from the speaker. [via] Link.

4 thoughts on “Build you own metal detector

  1. metalldetektor kaufen says:


    Great post how to build a metal detector ! I will try that and let you know if it worked …


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