EEVblog No Script, No Fear, All Opinion 
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
Podcast: Download
About EEVblog
Related Articles
Check Also
EEVblog 1576 – Tektronix DMM916 Multimeter Teardown & (Easy) Repair
Easy repair and teardown of the rather obscure Tektronix DMM916 Multimeter. Ebay auction: https://www.ebay.com.au/itm/225848873343 Forum: …
