encoderaudio:
Yes, I'd like to make a clock generator, which send 7 ms pulses to my modular synth. The pot should change the frequency of the pulsing, between 10 ms and 1 sec. (cca.)
Sooo,
You want an output that looks like this:

Right?
And the the seven millisecond timing is important to ... what level? Since you can time with either milliseconds or microseconds, a precision of a hundred ppm or so seems like a reasonable limit.