Sound Activated Electronic Switch

Sound Activated Electronic Switch

Adjust the sensitivity of this circuit to control the on/off function of this circuit. Very practical circuit for a variety of projects. Turn on a light when your dog barks, or set of a siren when an intruder makes a loud noise.

Specifications:

  • L: 4-3/8" W: 2-1/2" H: 1/2"
  • Operates on 9 VDC battery.
  • Uses an Electret Microphone (very sensitive).
  • Sensitivity can be adjusted via potentiometer.
  • Turns on/off an LED mounted on the board.
  • Has connection for a relay (not included, 9v 500ohm coil recommended).
  • Circuit activates upon sound and stays active until another sound triggers the circuit.
  • Connections for relay on board.


Sound Activated Electronic Switch Reviews:

  • --> The kit instructions are quite clear; the kit was easy to build. However, the description on the website said:

    "Adjust the sensitivity of this circuit to control the on/off function of this circuit. Very practical circuit for a variety of projects. Turn on a light when your dog barks, or set of a siren when an intruder makes a loud noise. Circuit activates upon sound and stays active until another sound triggers the circuit. "

    According to the instructions supplied with the kit, this circuit fires only after TWO claps, and turns off after another TWO claps. I wanted it to detect a single noise, not two. Hence it is not suitable for my purpose. The website description is misleading and should have stated how it operates.