Increasing frequency pulse generator (for motorcycle brake light)

Discussion in 'The Projects Forum' started by JeremyCondie, Jan 5, 2015.

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  1. JeremyCondie

    Thread Starter New Member

    Jan 5, 2015

    I have several motorcycles and want the rear brake light to pulse a few times before remaining on. I have built a circuit to do this using a quad nand gate.

    However, at the moment the pulses are of equal duration. I can set the duration and pulse length and at the moment I have five flashes before the brake light remains on (while I am depressing the brake lever).

    I would prefer to have variable pulse widths whose frequency starts slowly and then steadily increases before the light remains on. i.e. flaaaaaash, flaaaash, flaash, flash, on ......

    Any help is much appreciated.
  2. Wendy


    Mar 24, 2008
    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:

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

    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:

    Another good forum that shares many of the same membership is . Good luck.
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