This VOX circuit can be used to operate a tape recorder, ham
radio, CB radio, or turn on an alarm. The VOX-1 kit has
80MA of output that operates a relay, light, motor etc. What
could you do with a sound activated switch?
We have allowed a place on the PC Board for you to supply a DIP style Relay.
Power requirement 7.5 to 18v DC.
SIZE: 1.5" x 1.3"
Here is the instruction sheet for the VOX kit.