Audio Kits Voice Operated Switch Kit K5542

(Silicon Chip Magazine July. ’11) This versatile VOX circuit is triggered whenever a noise or sound is made causing a relay to close for a preset time. Requires a 12V DC power supply and a microphone. Reaction sensitivity and on time are fully variable. Optional manual over-ride.

Ideal for:
Controlling tape recorders
Slide projectors
Eliminate the need for a press to talk button on transmitters
Turn on external porch lights
Paging systems
Hands free intercom switch

Important Note For Kit Buyers:
This product is supplied in component form and requires soldering, drilling, and assembly. We recommend users are familiar with at least basic electronic principles and have the ability to solder.