[sdiy] asm-1 vco help

René Schmitz uzs159 at uni-bonn.de
Mon Aug 19 12:47:37 CEST 2002


At 15:44 17.08.02 -0400, you wrote:

>The drain(if I got the correct pin) of Q3 is at 15V.  U3 pin 6 is at 15V.

Probably you didn't connect pin 1 of the Lm311. Its called ground, but 
in this circuit it needs to be at -15V. What you describe means that the 
ramp never gets reset, and thats a possible cause, because this 
connection isn't in the schematics...

Cheers,
 René




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uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159

 




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