I tested how fast I can push the LM311 and I'm happy to say it can handle over 1.1 Mhz. so looks like this circuit will have a range from about 100 Hz to 1 Mhz.
There is a little problem at the high freq side, when adjusting the freq, the pulse width does change a little, but we can adjust the pulse width and maintain the same freq.
Maybe once in assembled in a PCB this issues will go away. test boards like the one I'm using has built in capacitance and they no good for high freq testing.
Plz Electrojolt , the waiting is killing us .
Hey Dankie, just hang in there, Fortunatly I have a Full time Job and a Wife, I don't have much time to work on this, I have been working on it litle by litle and posting my progress. I think I have a stable circuit now and I'm starting to draw the schematic. I think I should have it ready by Mid week.
for those who want to build it will need two 555s, 2 LM311, 2 100K Pots, 2 10K pots, some 1K and 10K resistors, and some capacitors, 1 PNP and 1 NPN general purpose transistors, 2 fast switching diodes, those little red ones.
