[sdiy] 3 position switch help

[Dave Manley]

Well lookie here at the fourth Google hit when searching "C&K 7211":

http://www.edn.com/article/CA6339250.html

The author looks familiar.  :-)

-Dave

harrybissell at wowway.com wrote:
> 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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>>>
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> 
> 
> Harry Bissell & Nora Abdullah 4eva
> 
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