constant to Separate momentary on off

Discussion in 'The Projects Forum' started by Textinstar, Apr 12, 2012.

Thread Status:
Not open for further replies.
  1. Textinstar

    Thread Starter New Member

    Apr 12, 2012
    Can someone help me with a circuit to monitor an existing switched 12v+ signal
    & output separate momentary on & off pulses, whilst consuming minimal to no power in the off state.

    Separate momentary outputs in response to an On/Off switched DC input
    The pulsed outputs, xxx? milliseconds long triggered during the Change of state from On and Off.
    Something like
    Or like the attached circuit but separate on & off outputs.

    In the attached (B/W) image You can see a momentary SPDT ON-OFF-ON switch,
    I would like to replace this switch with a circuit triggered from a switched 12v+ input,
    that will output a control signal for the (BRN) & (ORG) wires.
  2. praondevou

    AAC Fanatic!

    Jul 9, 2011
    1. How long will be the pulses? Are they equally long for both outputs?
    2. You need one pulse when a 12V signal turns on and another pulse (on a different output) that turns on when the 12V disappears, correct?
    3. apart from the 12V "signal" what will be the power supply for your circuit? 12V as well? Same reference or completely isolated?
    Textinstar likes this.
  3. Wendy


    Mar 24, 2008
    I am sorry, but the owners of All About Circuits has elected not to host discussions of automotive electrical system modifications/enhancements due to safety concerns, the potential of legal ramifications and the possible circumvention of vehicle regulations at the state and federal level.

    This thread is against the AAC forum rules, Chapter 6, as seen here:

    Automotive modifications of any kind are strictly forbidden. Therefore, this thread will be closed.

    Please try to understand the reasons behind this action, and feel free to browse and use the forums.

    You might find answers to your questions in one of these forums:
Thread Status:
Not open for further replies.