[sdiy] CV to rotary encoder?

[Paul Maddox]

Paul,

> A lot of gear now has a rotary encoder..
> there is probably an easy way to make a CV to rotary encoder
> converter, so when the CV increases by yea much, the encoder
> goes foward one unit and so on.
> Or just keeps going up while CV is above a threshold, back
> when below it.

I'll get shot for this but, probably the simplest way is to use a small
micro with an ADC
(Mega8 has 6 ADCs).. you would read the ADC to get the CV, have another ADC
as your threshold, and then have two pins driving two transistors in open
collector mode to give up/down pulses (assuming you wanted to connect it
directly across a rotary encoder), if not you could just use the two outputs
directly..

If you use something like the MEGA8 you can it on one chip (has built in
1Mhz clock, fast enough for that)

Paul
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