Published on September 1, 2017
This is a simple Polarity Detection Circuit for distinction between AC and DC.
Two switches adjust the operating voltage.
Switch 1 : ON, Switch 2 : ON – 6V ~ 12V
Switch 1 : ON, Switch 2 : OFF – 12V ~ 30V
Switch 1 : OFF, Switch 2 : OFF – 30V ~ 300V
