Voice Activated Switch KIT - VOX-1 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.
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VOX-1 Kit $6.95 Quantity:

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Rainbowkits - 121 E. North St. - New Ross IN 47968 - (765) 230-2301