•  
  •  

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

DC 100V 10A Voltmeter Ammeter Blue + Red LED Dual Digital Volt Amp Meter Gauge__
$2.7 DC 100V 10A Voltmeter Ammeter Blue + Red LED Dual Digital Volt Amp Meter Gauge__ picture
LED Digital Voltmeter Voltage Indicator Ammeter 0 - 30V 10A A7Z4
$3.75 LED Digital Voltmeter Voltage Indicator Ammeter 0 - 30V 10A A7Z4 picture
0-100A LCD Digital Volt Current Power Panel Meter Ammeter Voltmeter AC 80-260V
$1.72 0-100A LCD Digital Volt Current Power Panel Meter Ammeter Voltmeter AC 80-260V picture
0-100A LCD Digital Volt Current Power Panel Meter Ammeter Voltmeter AC 80-260V
$9.99 0-100A LCD Digital Volt Current Power Panel Meter Ammeter Voltmeter AC 80-260V picture
0-100A LCD Digital Volt Current Power Panel Meter Ammeter Voltmeter AC 80-260V
$8.14 0-100A LCD Digital Volt Current Power Panel Meter Ammeter Voltmeter AC 80-260V picture