•  
  •  

Contactless Mains Voltage Indicator

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. If mains supply is available in the conductor, the electric field would be induced into the sensing probe. Since IC used is CMOS type, its input impedance is extremely high and thus the induced voltage is sufficient to clock the counter IC. Thus display count advances rapidly from 0 to 9 and then repeats itself. This is the indication for presence of mains supply. Display stops advancing when the unit is taken away from the mains carrying conductor. For compactness, a 9-volt PP3 battery may be used for supply to the gadget

If there are any problems please contact webmaster@electronic-circuits-diagrams.com

Please share & like

NEW In Box Chicago Faucets Solenoid Valve For EQ., (243.152.AB.1)
$30.0 NEW In Box Chicago Faucets Solenoid Valve For EQ., (243.152.AB.1) picture
New Old Stock Waterman Solenoid Valve 12C1SH
$50.0 New Old Stock Waterman Solenoid Valve 12C1SH picture
Newco Dump Valve Solenoid Repair Kit Lot Of 10
$99.0 Newco Dump Valve Solenoid Repair Kit Lot Of 10 picture
New Complete Tractor Fuel Solenoid for Ford/New Holland 0-330-001-040
$32.71 New Complete Tractor Fuel Solenoid for Ford/New Holland 0-330-001-040 picture
New Fuel Solenoid For Fiat F100 F100DT 9967829
$40.87 New Fuel Solenoid For Fiat F100 F100DT 9967829 picture