[sdiy] 8038 XR2206

[Derek Holzer]

Tom Bugs wrote:

> Many details would, I reckon, be covered by the recent Thomas Henry VCO 
> Chip Handbook published by the great sMs Electronics (State Machine on 
> Electro-music)

Just got this in the mail last week, and it really is fantastic! There 
are quite a few tricks to be done with the power supply, to extend the 
CV range, do different types of waveshaping/wavemultiplying like Tom 
mentioned and make to the output properly logarithmic. And yes, the 8038 
is out of production and generally about twice as expensive as the 2206, 
which seems to be the winner of the bunch in terms of usability anyways.

http://matrixsynth.blogspot.com/2007/06/vco-chip-cookbook.html

Tom's compact PCB also looks very usable and I've been thinking to etch 
up a few in the coming weeks.

One thing I was curious about, and maybe I should just read the relevant 
chapter in the book about, is what happens if you use a 12V power 
supply, such as that which comes with my Doepfer rack (+12/-12V in 
addition to the +5/-5V), instead of the 15V one. My expectation would be 
a lower pitch range, but I'm not sure what else...have you tried that, Tom?

best,
d.

-- 
derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista
---Oblique Strategy # 157:
"Think
- inside the work
- outside the work"