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relay switch required for input of 14mv (RMS)

Discussion in 'General Electronics Discussion' started by officework13, Jun 25, 2010.

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  1. officework13


    Jun 25, 2010
    working on a project that i need a relay switch to close the circuit for 1-2 seconds.
    i have a device (clay bird thrower (CBT)) that operates on 12V.
    currently to CBT motor turns the throwing arm to a certain point where it stops.
    then when i push the switch (which is a simple momentary switch) the power goes to an existing relay to power the motor for 1-2 seconds bringing the arm around to a point where the spring loaded mechanism can advance on its own without the motor. I do not know the volt/amp specs that flow through the switch. i suspect this would be helpful but do not know how to measure this. if you could instruct me that would be great. it is just 2 wires and a ground.

    now here is what i want to do.
    i have a Nady VR-151 which is a remote audio device that can be used to speak over a speaker wireless.
    i would like to utilize this so that i can go from a remote location to trigger the CBT motor based on my audio signal, but it can only go for 2 seconds max or it will recycle.

    the Nady specs the audio output to be 14mv (RMS) and 600 ohm.

    so my thought is to hook up the Nady output to the micro relay and to the CBT.
    then when i speak loudly into the microphone it will trigger the relay and complete the circuit.

    please advise if such a thing can be done and any other info you may need to assist me. thanks.

    also, if need be i have a portable audio amp which i could plug the output nady 151 to with the amp output into the CBT, and the output would be much higher, but i am not certain as to what its specs are.
  2. ChosunOne


    Jun 20, 2010
    I can't help you with your question, but I'm going to put my $.02 worth in on another matter: How quiet is the environment where you want to operate your audio-triggered clay bird thrower?

    I work in an industry that uses acoustically triggered devices. Those devices have undergone several decades of R&D, mainly in signal processing to filter out environmental acoustics we don't want triggering the devices. It's come a long way, but it's still a work in progress.

    Don't know if that's an issue for you but I thought I'd bring it to your attention.
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