[sdiy] 3 position switch help

[Sean Ellis]

Thanks for all the help with this, I should have read the fine print ;) This 
is the circuit I was thinking of but I missed the part that specified the 
7211 switch:
http://www.simple-answer.com/3_pos_switch.jpg
It's not really worth me getting this part for this circuit, or using logic 
switching as I have the panel space for 2 switches and can use switched 
jacks for more variety.

----- Original Message ----- 
From: <harrybissell at wowway.com>
To: "anthony" <aankrom at bluemarble.net>; "jeff brown" 
<guitaricon at verizon.net>; <synth-diy at dropmix.xs4all.nl>
Sent: Monday, May 19, 2008 8:02 PM
Subject: Re: [sdiy] 3 position switch help


> 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
>
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