New sound-operated-kit



New product

This Mini Sound Activated Switch, or mini-VOX – voice operated relay – is based on a circuit published in Silicon Chip, 9/1994, p31. We have improved it by putting an on-board Koa potentiometer in order to adjust the sensitivity. The idea behind a VOX is that instead of the user pressing a switch to activate a relay, the sound of the users voice itself activates the relay.

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15 Items

INR 850.00


  • L: 2-1/4″ W: 1-1/4″ H: 5/8″
  • Requires 12 VDC Power Supply
  • Current drain when off is 5-7mA and 35mA when activated
  • Relay output rated at 12/24VDC/1A
  • Microphone can be connected on leads up to 2 feet away from the PCB.
  • Off time delay adjustable by changing component values.
  • Electronic Kit – Soldering required.

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