Contactless AC Mains Voltage Detector  

Voltage Detector Circuits
Added on
Mar 7, 2013
This is a CMOS IC (CD4033) based circuit which can be used to detect presence of mains AC voltage without any electrical contact with the conductor carrying AC current/voltage. Thus it can be used to detect mains AC voltage without removing the insulation from the conductor. Just take it in the vicinity of the conductor and it would detect presence of AC voltage. If AC voltage is not present, the display would randomly show any digit (0 through 9) permanently.
Contactless AC Mains Voltage Detector - schematic

Leave Comment

characters left: