[sdiy] Control volt into computer over soundcard?

[Harry Bissell Jr]

--- Iain Duncan <iainduncan at telus.net> wrote:

> I was thinking, perhaps an amplitude modulate pulse
> wave at the nyquist
> would be good because on the computer end, then
> every second sample
> would be the correct data ( either 0 or peak amp )
> making riding the
> signal simple ( and need a very small window ). I
> have no idea how
> practical this would be to generate in electronic
> terms though, any
> suggestions?

That sounds like a really tough way to do it...
How would you guarantee that you were right at the
limit and would stay there without drift.

There were some previous threads on using FM methods
to record CVs with a sound card... check the archives
for some really good (and really bad) ideas

H^) harry