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
Why is my lab power switchboard wired like this? Forum: https://www.eevblog.com/forum/blog/eevblog-1652-why-is-my-lab-switchboard-wired-like-this/ Podcast: Download