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
    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
    Let the motion detector fire a relay, then use the relay to switch the Halloween prop on /off
    ampere_elec likes this.
  3. wayneh


    Sep 9, 2010
    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.
    ampere_elec likes this.