Polarity Tester

by: PCBWay Mar 25,2021 1351 Views 0 Comments Posted in PCB Design Tutorial

In this video we take a circuit from the March 2021 ARRL Magazine (Ham radio) designed by John Burnley. It is a polarity tester for your wall wart power supplies. Are center negative or center positive? You can plug the output into this board and know instantly.

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