[sdiy] digital control of CV

jure zitnik kokoon at gmail.com
Mon Sep 3 19:32:56 CEST 2007

ok, so it can be done. still, i'd prefer through-hole.

but we got carried away a bit - i still need ideas, your experience,
what's worked for you in
the past.

i'd be needing 16-24 CV channels for stuff like envelopes, filter
settings, vco settings... i realize i'd need a more accurate DAC for
VCO pitch control, but how much bitdepth really?

also, how would i go about making switches (like VCO waveform)
digitally controlled?

no matter if i decide for muxing or multiple DACs, i'd still like to
know how fast are those chips, would a serial multichannel (like 8
channels) DAC be maybe too slow for stuff like fast envelopes? what
about demuxing, how many channels would i be able to get on a single
line (12 bits for instance)...

those are the questions in my head right now, so if anyone can shed
some light on the subject, i'd be really happy!


On 9/3/07, Seb Francis <seb at burnit.co.uk> wrote:
> Samppa Tolvanen wrote:
> >
> > Pin _centers_ are 0.5mm apart :D
> >
> >
> Well this is certainly possible with the right technique.  0.65mm pitch
> is quite easy so I wouldn't imagine 0.5mm is much harder.
> I wrote a tutorial here:
> http://burnit.co.uk/sdiy/index.php?page=4xd&subpage=soldering
> (pic of soldered 0.65mm pitch IC at the bottom of the page)
> Pin for pin it actually works out quicker than soldering thru-hole once
> you get the technique down.  Plenty of flux is the key!
> Seb
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