will the voltage affect the prop?

Discussion in 'The Projects Forum' started by ampere_elec, Sep 24, 2012.

  1. ampere_elec

    Thread Starter New Member

    Sep 24, 2012
    1
    0
    Hi there, this is my first thread, I'm new too electronics but know the basic due to my knowledge of electrical workings, anyway my question is, I have a motion dectector kit that runs off a 12v supply and a Halloween prop that runs off 3x AA batteries the prop had a rubbish sound activated trigger, I want to replace the sound active trigger with the sensor but will the 12v supply give like a back feed into the prop, therefore affecting/activating the Halloween prop?
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,986
    745
    Let the motion detector fire a relay, then use the relay to switch the Halloween prop on /off
     
    ampere_elec likes this.
  3. wayneh

    Expert

    Sep 9, 2010
    12,123
    3,047
    If you could force the prop into an always-on state, then you could probably control it with power on/off with the motion detector.

    Otherwise, hacking one sensor in place of another requires seeing the schematic and/or circuit boards. It may be easy to do, but not blindly.
     
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