How would you use a pot for this?
Say for example, you set the pot for 3 seconds....
The timer kicks in, and passes the 12V along for 3 seconds.
After 3 seconds, the timer expires, but since the pot is analog, i is still set to 3 seconds, and the circuit is still set to read it. So instantly, when the timer expires, it is reset for 3 seconds.
so, basicly, what you get is a constant on situation.
Although I could be wrong. What does your sim say?
Just out of cureosity, what is this circuit being used for, and what school do you go to?
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