Mini Operated Voice Relay Schematic


Posted on Feb 5, 2014

This mini-VOX voice operated relay is based on a circuit published in Silicon Chip, 9/1994, p31. The off delay time may be adjusted by varying R3 and R4. Reducing R3 will result in a longer release time. You could change the release time constant (C2 & R5) to say 30 seconds and use the VOX as a light switch with this delay time before turn


Mini Operated Voice Relay Schematic
Click here to download the full size of the above Circuit.

ing 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 The kit of this circuit available at kitsrus. com anf electronickits. com, you may buy the circuit there.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Transistorized flashers
    op amp Op Amp based Colpitts oscillator
    obstruction detector with 12c508 ir
    Prevent tampering in energy meters
    Arduino ATmega328 Hardcore
    Handheld Oscilloscope Oscillator Circuit
    Taming the GTX 900 MHz
    USB Live Oscilloscope: Digital Input Board
    Vacuum-Tube Voltmeters



    Top