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 Forum index » DIY Hardware and Software » Jürgen Haible designs
Subtle Chorus mode selection
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What would you prefer for selecting 6 Modes
4 real, mechanical, interlocking pushbuttons
13%
 13%  [ 3 ]
A 6-position rotary switch
86%
 86%  [ 19 ]
Total Votes : 22

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jhaible



Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24

PostPosted: Wed Sep 24, 2008 6:24 am    Post subject: Subtle Chorus mode selection Reply with quote  Mark this post and the followings unread

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.

JH.

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"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f)
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kokoon



Joined: Jan 09, 2006
Posts: 158
Location: slovenia

PostPosted: Wed Sep 24, 2008 1:46 pm    Post subject: Reply with quote  Mark this post and the followings unread

hmmm... how hard would it be to include both options? i'm aware that rotary would be totally sufficient, but some of us will probably at least try to make it like the original (maybe round interlocking switches as somebody posted on the AH...)

but if it's too much work/real estate, then one rotary is really okay.
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v8pete



Joined: Jan 27, 2008
Posts: 43
Location: UK

PostPosted: Wed Sep 24, 2008 2:29 pm    Post subject: Reply with quote  Mark this post and the followings unread

Rotary fine by me!
Pete.
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synthetic



Joined: Jun 02, 2007
Posts: 76
Location: Glendale, CA

PostPosted: Wed Sep 24, 2008 5:20 pm    Post subject: Reply with quote  Mark this post and the followings unread

I like the rotary. Mode order can be 1, 2, 3, 4, 1+4, 2+4
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leitner6



Joined: Sep 25, 2008
Posts: 3
Location: Texas

PostPosted: Thu Sep 25, 2008 2:01 pm    Post subject: Reply with quote  Mark this post and the followings unread

I know having fancy switches is fun. How about making it more simple with 3 switches?


1. LFO Core switch

2. LFO Atten switch

3. Wet Boost switch


gives you 8 variations.
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jhaible



Joined: May 25, 2007
Posts: 2014
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Audio files: 24

PostPosted: Thu Sep 25, 2008 2:41 pm    Post subject: Reply with quote  Mark this post and the followings unread

Ok - thanks for all suggestions!

My conclusion is: I *will* replace the simple LFO with something that can be controlled with a 6-pos rotary switch, and I'll find a way to implement other ways of control as well.

And it's possible to decode the 6 modes from 4 switches, too.

A lot of people have suggested three 2-pos toggle switches. I like the idea and and try to make that an option, too.

Then everyone can choose for him(or her)self what to put on the front panel.

JH.

_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f)
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Peake



Joined: Jun 29, 2007
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PostPosted: Sun Sep 28, 2008 10:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

Late to the thread, and something like this can likely be found for less, but here 'tis:

http://hairballaudio.com/shop/product_info.php?cPath=21&products_id=30

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"IC 741. Sometimes you don't want fidelity." -Small Bear Electronics Catalog
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jfromel



Joined: May 27, 2008
Posts: 79
Location: Seattle, WA

PostPosted: Mon Oct 06, 2008 9:31 pm    Post subject: Reply with quote  Mark this post and the followings unread

why not do the same as I did with the Dim C clone, just have 4 DPDT swithches. There would be some redundency of modes but that would be the same as the original Dim-D.
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jhaible



Joined: May 25, 2007
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Audio files: 24

PostPosted: Mon Oct 06, 2008 11:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

jfromel wrote:
why not do the same as I did with the Dim C clone, just have 4 DPDT swithches. There would be some redundency of modes but that would be the same as the original Dim-D.


The nice thing about interlocking switches is ... that they are interlocking.

You *can* select more than one at a time, but you can also select one, without first unselecting the previous.

JH.

_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f)
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jhaible



Joined: May 25, 2007
Posts: 2014
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Audio files: 24

PostPosted: Mon Oct 06, 2008 11:08 pm    Post subject: Reply with quote  Mark this post and the followings unread

... but: That part of the PCB is designed now. It will support every variation we were talking about.
Thanks for all the input!

JH.

_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f)
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Peake



Joined: Jun 29, 2007
Posts: 1112
Location: Loss Angeles
Audio files: 3

PostPosted: Sat Oct 11, 2008 11:20 am    Post subject: Reply with quote  Mark this post and the followings unread

Is the switch type SPDT? This DPDT array might be helpful:

http://www.goldmine-elec-products.com/prodinfo.asp?number=G16442

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We are selling emotions, there are no emotions in a grid. -mwagener

"IC 741. Sometimes you don't want fidelity." -Small Bear Electronics Catalog
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jhaible



Joined: May 25, 2007
Posts: 2014
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Audio files: 24

PostPosted: Sat Oct 11, 2008 1:24 pm    Post subject: Reply with quote  Mark this post and the followings unread

Peake wrote:
Is the switch type SPDT? This DPDT array might be helpful:

http://www.goldmine-elec-products.com/prodinfo.asp?number=G16442


Original has DPDT.

These goldmine switches are pleasantly cheap, but they are not interlocking as far as I can tell, and mounting them might also be a problem.

JH.

_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f)
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Peake



Joined: Jun 29, 2007
Posts: 1112
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PostPosted: Sat Oct 11, 2008 1:58 pm    Post subject: Reply with quote  Mark this post and the followings unread

As you can see, it appears that each switch has to be toggled individually. It would be up to the user to de-select things.

Aren't you going to add space for them on your PCB? Wink Wink

I can't wait....yum....

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We are selling emotions, there are no emotions in a grid. -mwagener

"IC 741. Sometimes you don't want fidelity." -Small Bear Electronics Catalog
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guitarfool



Joined: Feb 26, 2007
Posts: 156
Location: Maryland
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PostPosted: Tue Oct 14, 2008 7:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

Are you definitely using the MN3007 for the BBD Board? I ask because I'd like to order them from SmallBear before he runs out of them, too. Shocked Very Happy
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jhaible



Joined: May 25, 2007
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Location: Germany
Audio files: 24

PostPosted: Tue Oct 14, 2008 11:51 pm    Post subject: Reply with quote  Mark this post and the followings unread

guitarfool wrote:
Are you definitely using the MN3007 for the BBD Board? I ask because I'd like to order them from SmallBear before he runs out of them, too. Shocked Very Happy


Yes, definitely.
The BBD board design is finished and tested:
http://www.jhaible.heim.at/subtle_chorus/jh_subtle_chorus_BBD_Board_PCB_values.pdf

Still working on the "main board".
My goal is to provide you with a board that allows the use of modern opamps as well as these vintage ones in SIL package plus the original output transistors. Makes the layout a bit complex, and layouting a bit slow, but I hope it will be worth it, in the end.

JH.

_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f)
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