Mini Voice Operated Relay circuit diagram

  
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This is the circuit diagram of a voice operated relay. It similar with sound activation switch circuit which will turn on and turn off (connect and disconnect) the switch depending on the sound input. The output switch of this circuit is act by a relay. You could change the release time constant (C2 & R5) to say 30 seconds and use the VOX as a lig
Mini Voice Operated Relay circuit diagram - schematic

ht switch with this delay time before turning off. Increase C2 to say 10uF and R3 to 3M3. To make the easy adjustment, you may use potensiometer or trimpot to varying the value of resistor. You will need additional place on the PCB but it will easier for you to make some adjustment



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