Discussion in 'The Projects Forum' started by eljoshy0, May 26, 2014.

  1. eljoshy0

    Thread Starter New Member

    Oct 7, 2013
    Im working on a circuit. I need a component that will have 2 inputs and 1 output. 1 Input will be the power source, the 2nd will be a switch. what I need is something that will only drain the power source if the 2nd input has power. thanks
  2. inwo

    Well-Known Member

    Nov 7, 2013
    Any transistor or relay will do that.

    Connect the base or coil to the 2nd input.

    Connect the contacts or collector circuit to the power source, thru what ever load you want to "drain" the power source with.

    What power levels? How much time to drain the power source?