[sdiy] Fully assignable sequencer

[dj hohum]

Damn good idea Ken. I think I'm going to use that. Not only is it
precise and readable at a glance, but, it's easy to put on a pcboard
and it's very compact. Moreover, you only need to make one square hole
for each bank of thumbwheels.

Daryl

On 7/10/07, Ken Stone <sasami at hotkey.net.au> wrote:
> Binary thumbwheel switches. Diode OR gated from the outputs into a 4 bit
> R/2R D/A converter, driven by a 4017 or similar.
>
> Ken
>
> >The Niessen is using rotary *encoders*, so there's not much in the way
> >of wiring. I wouldn't want to try it with rotary switches unless they
> >were pcb mounted.  For quantized voltages to supply to the switches, it
> >would be easy to design a resistive divider/current source like those
> >used in old analog cv based keyboards to generate the inputs to the
> >switches, and then use an analog mux to generate the cv out.  The
> >mux/control logic could be similar to any number of old sequencer
> >designs.  A cross-bred keyboard/sequencer.  Hmmm...maybe not such a bad
> >idea...
> >
> >-Dave
> >
> >Scott wrote:
> >> Those rotary switches are a great idea, but looks like it would be a LOT
> >> of work to wire up.  Has there been discussion here about how to do
> >> something like that?
> >> The surplus store in town had a box of little 12x1 rotary switches last
> >> time I was there.. hmm.....
> >>
> >> -----Original Message-----
> >> Subject: Re: [sdiy] Fully assignable sequencer
> >>
> >> And to be honest: the only commercial available HW sequencer which
> >> produces real usable CVs for oscillator pitch in classic tonal music is
> >> the Niessen SAM-16. No pots but switches..
> >
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> _______________________________________________________________________
> Ken Stone   sasami at hotkey.net.au
> Modular Synth PCBs for sale <http://www.cgs.synth.net/>
> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
>
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