EEVblog #714 – Metal Detector Reverse Engineering


How does a metal detector work?
Dave teardown and reverse engineers the circuit in a $17 Harbour Freight wand type metal detector, and also explains how to do basic reverse engineering of a PCB.

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14 comments

  1. Did you get the new cloud version of DaveCAD? It looks slicker and without ads..

  2. Thanks Dave, I’ll probably have to buy one and mod it now.

  3. Dave if I just had a little bit of your knowledge I would be set.

  4. perhaps an LVDT workings in a future video??

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  6. I like this reverse engineering stuff if you were to design your own circuit, would it just breadboard trial and error or is there more standard way to see if your design works.

  7. So when you measure an inductor it’s with respect to a certain frequency? How did you know to choose 10khz?

  8. This is totally helpful and detailed.

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