Mains-operated Capacitive Sensor

Posted on Apr 22, 2012

This very simple circuit acts as a high sensitivity capacitive sensor. Lamps and/or Buzzers are operated at half the mains supply voltage when a part of the human body comes in contact with the sensor or approaches it at a close distance. The circuit can be used as an alternative to the Door Alarm or Capacitive Sensor circuits, already available on this website.

Mains-operated Capacitive Sensor
Click here to download the full size of the above Circuit.

Leave Comment

characters left:

New Circuits



Popular Circuits

Mosfet Buffer Amplifier Circuit
transistors Mystery circuit: latching relay control with transitor / capacitor why doesnt it work
Circuit diagramms of the 144 SBB/RX - Receiver
Minimum Theremin Schematic
Audio clipping indicator circuit
Square Wave Generator using Op-Amp
TA8136S Radio Control Transmitter Ic - Toshiba Semiconductor
Measuring SN audio bandpass filter circuit
DK-1 type control box using the AC electromagnet closing circuit