[sdiy] 3 position switch help

[harrybissell at wowway.com]

The C&K type is a 7211 and its called an "on-on-on" switch.

Wiring diagrams can be found on the data sheets, other companies
such as NKK make the same part.

They work great, and you can do even more tricks than just
three way with them (decode various switch states etc, interesting
waveform selects etc). Be creative

H^) harry



On Sat, 17 May 2008 14:46:52 -0400, anthony wrote
> Yes, it's that special switch that I think people use in Buchla 292C 
> circuits sometimes? I forget the C&K number, but if you look at he 
> German link in another message you can see how when the switch is in 
> the middle position, only ONE of the switch contacts has moved: when 
> it's UP, both are UP, when it's in the middle one is UP and the 
> other DOWN, when it's DOWN both are DOWN.
> 
> You could call this an asynchronous DPDT ON-ON-ON or something like that.
> 
> Depending on what you are doing a normal DPDT ON-OFF-ON (more common)
>  can be used as a three position switch if you are using it to 
> switch different values of resistors or something.
> 
> You could have the top one be 2 resistors in parallel, the middle be 
> just one of the resistors switched on and the bottom be 2 resistors 
> in series. However you like, you get the idea.
> 
> AA
> 
> > Oh, and I think it needs to be a DPDT on-on-on switch, not and on-off-on.
> >
> > ----- Original Message ----- 
> > From: "Sean Ellis" <tensiontype at hotmail.com>
> > To: <synth-diy at dropmix.xs4all.nl>
> > Sent: Saturday, May 17, 2008 9:33 AM
> > Subject: [sdiy] 3 position switch help
> >
> >
> >>I once found a simple wiring circuit to convert a DP3T on/off/on switch 
> >>into a 1P3T on/on/on switch but I cant find it anymore. Can anyone help 
> >>out? Google is not helping much :(
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Harry Bissell & Nora Abdullah 4eva