Brake light flasher circuit

Discussion in 'The Projects Forum' started by Acey, Feb 18, 2015.

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  1. Acey

    Thread Starter New Member

    Feb 18, 2015
    What I'm trying to do is add an auxiliary flashing brake light to a vehicle with an external flasher, but I only want that flasher to be active for about 3 or 4 seconds after the brakes have been applied, and to not activate with successive applications of the brake within a period of about 30-45 seconds.

    So I'm thinking of two rising edge triggered 555 timers in monostable mode. Top one would be the 30 second timer, producing a long pulse whose rising edge would trigger the 4 second pulse to activate the flasher.

    Would this work?
  2. #12


    Nov 30, 2010
  3. MrChips


    Oct 2, 2009
    The owners of All About Circuits have elected not to allow 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:

    This can be found in our Terms of Service (ToS)

    Here is a site that may provide you with some assistance: Electro Tech Online

    Good luck
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