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previous: Dave B. oh yeah, forgot to mention somethin... -- 2/2/1999 11:00 AM View Thread

Re: Uni-vibe LFO questions

2/2/1999 12:14 PM
R.G.
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Re: Uni-vibe LFO questions
The problem there is that the LDR's are not necessarily very similar. While phase shift oscillators will work with non-matched time constants per section (the two pot sections form two of the R's in RC time constants) the results can be disappointing in terms of range and startup being reliable.  
 
If you select for resistances no more than 20% apart at the same LED currents, you'll be OK. The VTL54C3/2 has fairly matched sections, as they are two halves of the same LDR.

 
Replies:
Mike Irwin Hello,A simple way to make a wi... -- 2/2/1999 6:02 PM