•  
  •  

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

Siemens 3rt1036-1bb40 Coil Voltage Dc 24v Unused Boxed
$134.49 Siemens 3rt1036-1bb40 Coil Voltage Dc 24v Unused Boxed picture
Panasonic Aep18012, Steckelais Monostabiles Relay, 800vdc Coil
$145.8 Panasonic Aep18012, Steckelais Monostabiles Relay, 800vdc Coil picture
PRODUCTS UNLIMITED 3100-30Q7332 CONTACTOR 3 Pole X Amp per pole 24V Coil
$6.5 PRODUCTS UNLIMITED 3100-30Q7332 CONTACTOR 3 Pole X Amp per pole 24V Coil picture
1/4" OD x 50' Copper Refrigeration Tubing Coil - DIY Beer Wort Chiller Brewing
$46.99 1/4
JOHNSON CONTROLS T28DC-1 LINE VOLTAGE FAN COIL THERMOSTAT PENN-BASO
$45.0 JOHNSON CONTROLS T28DC-1 LINE VOLTAGE FAN COIL THERMOSTAT PENN-BASO picture