Voice and Touch Switch Circuit

| July 6, 2023 Updated
Voice and Touch Switch Circuit

The switch circuit works with touch and sound. It can also be used as a simple alarm circuit. The capacitive microphone can be placed on a window, door or an area inside the house, the relay works with impact or sound. The device connected to the relay becomes active (siren, lamp, motor, etc.)

When the touch pin is touched by hand, the relay activates and the relay keeps the contacts pulled until it touches it again or makes a sound again.

You can connect a relay instead of a RL 2.2k resistor and disable the CD4013 IC. CD4013 IC adds the feature of continuous opening and closing.

If you build the circuit on a perforated plate or bredboard, do not forget to connect the supply voltage pins, these pins are not visible in the proteus diagram! – vss pin 7 , + vdd pin 14

Voice Touch Switch Circuit Diagram

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Circuit is tested.

Voice and Touch Switch Circuit diagram and pcb:

Voice and Touch Switch Circuit

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Published: 2008/03/18 Tags:



1 Comment “Voice and Touch Switch Circuit

  1. Electronics CircuitsElectronics Circuits

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