Adjustable Pulsing Ground

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Thread Starter


Joined Oct 7, 2013
Hello all,

I have a project I would like to do, and I think it should be fairly simple to accomplish, but my googling has not led me to an answer. Basically I want to develop a switch that will pulse.

Here is the basic operation:

A simple momentary button will activate it
when this button is NOT pressed, the switch will simply be a normally closed circuit
When the user presses and holds the button, the switch will pulse open until the user releases the button.
This pulse will be adjustable.

For example, the circuit is closed and working normally, the user holds the button, the switch goes open for .001 second, then closed for .100 second, open for .001 second... etc. then the user releases the button and the switch goes closed completely again.

Any help would be great!



Joined Nov 7, 2013
Sounds like a fun project.

Why is it that the purpose of projects, always seems to be secret?:confused:
Giving the intended use, will elicit the most useful ideas.:)

Sounds not to be a line powered device, with micro second timing!
Also leaves relays out.


Joined Oct 2, 2009
Perfectly doable project until you said the "car" word.

Sorry, read the Terms of Service and you will learn that discussion of automotive modifications is not allowed on AAC.

There are other forums than can help you.
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