• 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.

    Forum HERE

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

        • Photon Peddler

          And the design area is bigger, finally! And I like the background color better, too…

          • Photon Peddler

            And the fact that the grid is on by default now.

      • smellysam .

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

      • kjn4685

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

      • gmcurrie

        perhaps an LVDT workings in a future video??

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      • Paul

        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.

        • You might typically build and test on a breadboard, yes.

      • blipton

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

        • It was close enough to the operational frequency of the coil.

      • Marie Decker

        This is totally helpful and detailed.

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