Increasing frequency pulse generator (for motorcycle brake light)

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JeremyCondie

Joined Jan 5, 2015
12
Hi

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.
 

Wendy

Joined Mar 24, 2008
21,847
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:

6. Restricted topics. The following topics are regularly raised however are considered “off-topic” at all times and will results in Your thread being closed without question:

  • Any kind of over-unity devices and systems
  • Automotive modifications
  • Devices designed to electrocute or shock another person
  • LEDs to mains
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  • Transformer-less power supplies
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Automotive modifications of any kind are strictly forbidden. Therefore, this thread will be closed.

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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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