Pressure / Temp sender switch

Discussion in 'General Electronics Chat' started by quadfour, Feb 28, 2012.

  1. quadfour

    Thread Starter New Member

    Feb 28, 2012
    2
    0
    Hi. I've got a couple of automotive sender units, one for pressure, and one for temp. I'm hoping to setup a 'switch' action in addition to gauges. Aside from a spot of soldering, I'm pretty unskilled with electronics, but have done some reading and come up with this

    The comparitor I'd use would be a lm339 I think... there's two sender units I'd like to do this for. One sender operates from 10-180 ohms, and the other is 23-287ohms.

    I think my real concerns is about burning out the comparitor... I don't really know what I'm doing, and am not running large resistance there. Don't think I can with the gauge in parallel, and the low resistance of the senders?

    Am I heading down the right track? Sorry I don't have any real simulators etc.
     
  2. quadfour

    Thread Starter New Member

    Feb 28, 2012
    2
    0
    Just read the sticky. Guess I can't hold out hope on this thread.
     
  3. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,740
    759
    Be patient.

    Care to tell me more ?
     
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