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 Forum index » DIY Hardware and Software » Ken Stone designs - CGS
CGS75 - wiring a switch for rise/fall/both
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lanxe



Joined: Feb 24, 2005
Posts: 102
Location: Columbus, OH - Now Carson City NV

PostPosted: Fri Aug 21, 2009 2:27 pm    Post subject: CGS75 - wiring a switch for rise/fall/both Reply with quote  Mark this post and the followings unread

I asked over at the CGS yahoo group, but thought it might be helpful here as well.

I want to recreate something similar the DUSG panel - http://www.serge-fans.com/m-class-quad-slope.cfm

using a switch to route CV to the RISE/FALL/BOTH inputs (through the CV attenuating pot).

it seems trivial, but i cant seem to understand how to do this. Anybody else doing the same thing and can help explain the wiring?

Thanks,
Ryan
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TekniK



Joined: Aug 10, 2008
Posts: 1062

PostPosted: Fri Aug 21, 2009 3:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

don't think you will able to do it for 3 modes ,u can only for 2 modes in any combination (look pic with CGS75 shematic)

on the DSG the circuitry is a bit different (look pic of a SSG)
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lanxe



Joined: Feb 24, 2005
Posts: 102
Location: Columbus, OH - Now Carson City NV

PostPosted: Fri Aug 21, 2009 9:38 pm    Post subject: Reply with quote  Mark this post and the followings unread

TekniK wrote:
don't think you will able to do it for 3 modes ,u can only for 2 modes in any combination (look pic with CGS75 shematic)

on the DSG the circuitry is a bit different (look pic of a SSG)


Yeah, the picture you drew looks exactly like what i have in my head, but obviously its not going to get me the both input.

There has to be a way, no? or maybe i am making it more simple than it really is.

Maybe i will just have to go with the two modes (rise/fall) for now.
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TekniK



Joined: Aug 10, 2008
Posts: 1062

PostPosted: Sat Aug 22, 2009 2:09 am    Post subject: Reply with quote  Mark this post and the followings unread

just add another switch that selects rise/fall and both
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wmonk



Joined: Sep 15, 2008
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Location: Enschede, the Netherlands
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PostPosted: Sat Aug 22, 2009 2:36 am    Post subject: Reply with quote  Mark this post and the followings unread

Using this C&K 7211 switch it will work with one switch:
http://nl.mouser.com/Search/ProductDetail.aspx?qs=V0X8KZBlWwIZ97kF7byDEw%3d%3d

Or use a rotary switch.
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TekniK



Joined: Aug 10, 2008
Posts: 1062

PostPosted: Sat Aug 22, 2009 4:08 am    Post subject: Reply with quote  Mark this post and the followings unread

wmonk wrote:
Using this C&K 7211 switch it will work with one switch:
http://nl.mouser.com/Search/ProductDetail.aspx?qs=V0X8KZBlWwIZ97kF7byDEw%3d%3d

.


how?
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wmonk



Joined: Sep 15, 2008
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Location: Enschede, the Netherlands
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PostPosted: Sat Aug 22, 2009 5:18 am    Post subject: Reply with quote  Mark this post and the followings unread

As it's a DPDT on-on-on, the switched work as in the diagrams. (see attachment)

If you wire the switch by connecting the center-lugs together and connecting them to the input, you get all three options (option 1, both, option 2).


wiringDPDTononon.png
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wiringDPDTononon.png


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TekniK



Joined: Aug 10, 2008
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PostPosted: Sat Aug 22, 2009 7:49 am    Post subject: Reply with quote  Mark this post and the followings unread

Hey thanks,thats a cool switch!
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wmonk



Joined: Sep 15, 2008
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PostPosted: Sat Aug 22, 2009 8:22 am    Post subject: Reply with quote  Mark this post and the followings unread

That's a very cool switch. But I made a mistake Sad it's actually better then the switch above:

http://mypeoplepc.com/members/scottnoanh/sitebuildercontent/sitebuilderfiles/c%26k7211_3way.jpg

This schematic will work in our case Very Happy (thanks to Scott Stites for the schematic)
We really should do a group buy for this switch.
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lanxe



Joined: Feb 24, 2005
Posts: 102
Location: Columbus, OH - Now Carson City NV

PostPosted: Sat Aug 22, 2009 2:32 pm    Post subject: Reply with quote  Mark this post and the followings unread

that switch is exactly what i was looking for, thanks!

actually i came across that in my search for a solution, but without that diagram you posted, i couldnt figure out how to wire it.......thanks for posting that diagram too!

ryan
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zthee



Joined: Feb 20, 2008
Posts: 413
Location: Stockholm

PostPosted: Sun Aug 23, 2009 5:52 am    Post subject: Reply with quote  Mark this post and the followings unread

Did you try wiring it so the switch with center lugg to ground and then to the SWF and SWR pads?


switch.jpg
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lanxe



Joined: Feb 24, 2005
Posts: 102
Location: Columbus, OH - Now Carson City NV

PostPosted: Mon Aug 24, 2009 6:54 am    Post subject: Reply with quote  Mark this post and the followings unread

zthee wrote:
Did you try wiring it so the switch with center lugg to ground and then to the SWF and SWR pads?


let me try to understand this method..........

if CV is going into the "both" pad and the switch is the "rise" position.....it will pull the "fall" side down to ground and CV will only go to "rise". and vice versa for the opposite switch position.

If the switch is in the middle position, cv goes to both rise and fall.

I may try this first....it seems the easiest way to do it. your schematic there cleared up your earlier explanation a bit.

Thanks,
Ryan
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astroschnautzer



Joined: May 22, 2008
Posts: 31
Location: FINLAND

PostPosted: Sun Apr 18, 2010 10:40 am    Post subject: Reply with quote  Mark this post and the followings unread

how about a dp3t switch like these http://nl.mouser.com/ProductDetail/NKK-Switches/M2044SS1W01-RO/?qs=0RDYWt4CO4cDlqBsU8HyKw%3d%3d

if I got it right it switches between 3 different pairs of contacts...

that nkk is pretty expensive though.
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