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Reverse engineering a metal detector
posted February 16 2015 19:09.42 by Giorgos Lazaridis

Have I ever mentioned that reverse engineering is my hobby? Actually one of my hobbies. Here is a video from Dave showing how a proper reverse engineering is done. The victim is a $17 Harbour Freight wand type metal detector from an old mailbag...


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  • At 8 March 2015, 18:09:16 user Metal Detector wrote:   [reply @ Metal Detector]
    • The only interesting parts not populated, that I could see, is the "MOTOR" connection, which is in series with the unpopulated resistor R14.
      And if you look at the bottom side you can see that the buzzer "BZ" and "MOTOR" traces just run up to the 6 holes labelled "SW", perhaps an unpopulated switch, but they are just using that as a switchboard to select either the buzzer or the motor. Whatever the hell "MOTOR" would be in this case ... maybe a vibration motor?

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