[sdiy] Student projects from my Spring 2008 class posted

[René Schmitz]

Aaron Lanterman schrieb:

 > I'm pretty sure that's it. I knew when I saw the schematic that that
 > looked iffy. Someone on the list - I can't remember who - suggested that
 > the "weak" power supplied to the 4069 probably results in what he/she
 > called "motorboarding" effects.

Its called motorboating, and that was me who wrote that. :)

 >> (surely 10u bypass caps should be added at least?). I think there are
 >> some Buchla (or clone) schems for LPG floating around that show a
 >> simple way to get a stable supply, but I can't locate them right now.
 >
 > He uses op amps to get +/- 6V in the Buchla 259 timbre generator.

I would use an emitter follower, because the 4069 might (when steered 
fully class A) need more current than what an opamp (let alone a 
resistive divider) can deliver.

Cheers,
  René


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uzs159 at uni-bonn.de
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