Thanks again for the help.
Is it possible this is an existing circuit design? I have seen 555 designs, but haven't found this yet.
The idea is to close a switch for a very short period of time, .25 seconds or so, and then open the switch for about 1 second, and repeat this cycle as long as a momentary switch is held down.
This whole idea is to simply stumble the ignition of a car motor.
I understand the 555n should work, but I'm not totally sure how I would wire in the 12 volts, ground etc.
Also, I am assuming that I would need 2 incoming 12 volt positive lines. 1 for the power to the circuit, the other being the supply that is shorted out when the switch is closed.
Any help is greatly appreciated.
Thanks,
Chopperdog