Reverse Polarity Switch

Discussion in 'General Electronics Chat' started by vishwanathan, May 17, 2006.

  1. vishwanathan

    Thread Starter New Member

    May 17, 2006

    I need to make a safety feature for my project, but I losing track on how to go about it. Firstly, I need a relay or a switch that work like this, but wonder if it can be done.

    Line A will be input control, (also 12v), Line B will be supply(12v) to control main circuit to start. When line A have current flowing, Line B should cut off and vice versa.

    How should I make it simple, I am not very pro in electronic stuff.
  2. thingmaker3

    Retired Moderator

    May 16, 2005