Need HELP - Turn Signal / Hazard Lights with Astable 555

Discussion in 'The Projects Forum' started by juddcharlesw, Nov 27, 2013.

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  1. juddcharlesw

    Thread Starter New Member

    Nov 27, 2013
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    Hello,

    I am attempting to simulate a hazard light/turn signal combo with a 555 astable timer and one clocked J-K flip flop, as seen in my schematic attachment. I need them to flash at different rates, hence the 555 to create a slower waveform. I am using the slower flashing rate from the 555 to drive the turn signals.

    I have both signals working independently at the slower frequency, and additionally have the hazard lights working at twice the speed of the turn signal flash. The problem is, when the hazard lights are flashing, I need the turn signal function to be disabled. Currently when the hazard lights are flashing and I turn on the turn signal, the slower waveform from the turn signal is seen in the LED output as well.

    I'm sure there is some simple logic here that I'm missing, but I just can't put it together. Designer's block! Thanks so much for any help you can offer.
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    Show us your circuit diagram please,then we can assist you.
     
  3. juddcharlesw

    Thread Starter New Member

    Nov 27, 2013
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    I apologize, I forgot to attach that. PDF is attached here.
     
  4. JohnInTX

    Moderator

    Jun 26, 2012
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    You have multiple threads going on the same topic. Not only is that a no-no but its hard to provide coherent answers and have those possible solutions reviewed by other members.
     
  5. juddcharlesw

    Thread Starter New Member

    Nov 27, 2013
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    I apologize, I could not figure out how to delete my original post and place it into the homework thread instead.
     
  6. Wendy

    Moderator

    Mar 24, 2008
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    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:

    http://forum.allaboutcircuits.com/showthread.php?t=54400

    Another good forum that shares many of the same membership is http://www.electro-tech-online.com/ . Good luck.
     
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