[sdiy] Analysis of Dim D modes

[Florian Anwander]

Hi,

I buy these often here in Munich in the local electronic stores. So I 
don't know whether they are common. They are called Schadow
Look here for the search-string "Schadow". After some Web-research I 
found that Schadow has been sold several times and now the products are 
available as "ck-components". The shadow-switches can be found here:
http://www.ck-components.com/13342/fpush_29may.pdf/

Florian


Nathan Wooster wrote:

> Here is a store which sells interlocking pushbuttons (meant for a 1176)
> 
> http://hairballaudio.com/shop/index.php?cPath=21
> 
> It looks like you would have to make one rectangular hole to fit it
> 
> Nathan
> 
> ----- Original Message ----- From: "JH." <jhaible at debitel.net>
> To: "analog heaven" <analogue at hyperreal.org>; 
> <synth-diy at dropmix.xs4all.nl>; "MOTM List" <motm at yahoogroups.com>
> Sent: Wednesday, September 24, 2008 8:28 AM
> Subject: [sdiy] Analysis of Dim D modes
> 
> 
>> Hi,
>>
>> this is a question to those who plan to emulate the behaviour od a Dim D
>> with my upcoming Subtle Chorus project.
>>
>> As you all know, on a vintage Dim D you can get more than 4 modes by
>> pressing several of the 4 pushbuttons at once.
>>
>> I've analyzed the circuit, and found that there are exactly 6 diffenet 
>> modes
>> (surprisingly few if you consider the possible combinations).
>>
>> The results of my analysis are here:
>> http://www.jhaible.heim.at/subtle_chorus/dim_d_switches.pdf
>>
>> Now, I don't expect a lot of people to have access to real, interlocking
>> mechanical pushbuttons, and if you do, there's still the problem of 
>> exactly
>> spaced, and possibly rectangular holes in a front panel.
>> So I would like to replace these pushbuttons with rotary switch: with 6
>> positions, of course.
>>
>> This means re-designing the LFO circuit (no problem), but it also 
>> means that
>> it would be hard to connect 4 pushbuttons. (Well, maybe evan that 
>> would be
>> possible with some diode logic - haven't thought this thru.)
>>
>> So, is everybody fine with a 6-position switch?
>>
>> And if so, please give some ideas in what order to place the 6 modes.
>>
>> (If you're logged into the electro-music forum, you can even cast your 
>> vote
>> here:
>> http://electro-music.com/forum/viewtopic.php?t=29103 )
>>
>> JH.
>>
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> 
> 
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-- 
Florian Anwander                  |ConSol*
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