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 Forum index » DIY Hardware and Software » Ken Stone designs - CGS
cgs programmer/sequencer
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lanxe



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

PostPosted: Sun May 11, 2008 8:31 pm    Post subject: cgs programmer/sequencer Reply with quote  Mark this post and the followings unread

it seems like so many people are interested in analog sequencers, but there is very little on this sequencer.

well, its great! you can build it with as many stages as you want. you can choose the start/length of the sequence by patching from the pulse out of the last stage you want to the pulse in of the first stage you want. this is a very cool feature.

it clocks well with my mfos lfo, but i am sure it would step well with any pulse in. i want to play with this more (like hits from a drum machine).

it has 4 control voltages out which makes it pretty cool to control a couple of vco's and vcf's. it can get pretty crazy. each of the 4 control voltage outputs has its own row of pots so the sequence can be completely different than the row above it.

i also built the mfos sequencer which is great, but this one is very different. the mfos sequencer requires alot of wiring....which if you are like me, it can get messy. the cgs sequencer uses board mount pots which makes it clean, but also means you have to build it in the serge format (which is what i modeled my little synth after anyway).

thats my quick take on the subject. i will post a panel picture of mine, but since its panel mount pcb's it looks alot like ken's.

Ryan
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numbernone



Joined: Aug 16, 2006
Posts: 477
Location: new york city

PostPosted: Mon May 12, 2008 8:45 am    Post subject: Reply with quote  Mark this post and the followings unread

I also built this, totally great!!

However mine has one weird glitch; It boots up to step 5, and when advanced by the up/down triggers will only make it back to five but will not step past it. Very strange.

Any ideas out there on what is up, havent had loads of time to poke at it unfortunately.
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lanxe



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

PostPosted: Mon May 12, 2008 1:47 pm    Post subject: Reply with quote  Mark this post and the followings unread

mine actually did almost the same exact thing. it would stop but i could press the next step button and it would continue back around and stop again.

so i took the panel out and looked at my boards and re-soldered/cleaned up some of the joints that looked even remotely suspect. i think it was the link wires that go across the boards (just bad joints since i was assembling in such a tight spot). that was it. it worked and has worked since.

at first i didnt think the cpo (common pulse out) was working properly, but i just realized that the pulse length is short. works fine with the trigger input on the mfos adsr.


Ryan
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numbernone



Joined: Aug 16, 2006
Posts: 477
Location: new york city

PostPosted: Mon May 12, 2008 2:31 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hey thanks, been over it with my magnifying glass but not for a while. Got too busy using it manually, but now I really wanna drive it from an external source more regular sequencer style.

Im gonna try tonite to set it off with 8 free running square LFOs, one to each step and see what sort of madness pops out.
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lanxe



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

PostPosted: Mon May 12, 2008 4:27 pm    Post subject: Reply with quote  Mark this post and the followings unread

what if you tried to take out the bad step? i mean, temporarily wire around it and see if you can get it to step up and down that way. how many stages did you put in? i did 8.

Ryan
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otherunicorn



Joined: May 11, 2008
Posts: 136
Location: Australia

PostPosted: Mon May 12, 2008 5:32 pm    Post subject: Reply with quote  Mark this post and the followings unread

numbernone wrote:
I also built this, totally great!!

However mine has one weird glitch; It boots up to step 5, and when advanced by the up/down triggers will only make it back to five but will not step past it. Very strange.

Any ideas out there on what is up, havent had loads of time to poke at it unfortunately.

If there is a fault with a stage, you can almost guarentee you have done something wrong for the assembly and wiring for that stage, or one of the stages immediately next to it.
There is no magic answer. You have to get in there and see where you've made the error. Even I have had non-working stages. It's always been a blunder during assembly.

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numbernone



Joined: Aug 16, 2006
Posts: 477
Location: new york city

PostPosted: Mon May 12, 2008 6:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

Zoinks! Hi Ken, very nice to have you here!

I loved building this, a real gas. Like a ship in a bottle.

I will report back when its 100%.
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lanxe



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

PostPosted: Mon May 12, 2008 9:07 pm    Post subject: Reply with quote  Mark this post and the followings unread

here is mine:

Posted Image, might have been reduced in size. Click Image to view fullscreen.

horrible picture, i know. and its nothing different than what ken did with his.
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lanxe



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

PostPosted: Mon May 12, 2008 9:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

here is the overall portable synth i just about finished. just a mix of mfos and cgs designs in a serge style format. a couple of cgs vco's, 2 cgs vca's, cgs steiner vcf, psycho lfo, 2 cgs cv mega mixers and of course the programmer in the bottom right.

Posted Image, might have been reduced in size. Click Image to view fullscreen.
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Peake



Joined: Jun 29, 2007
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Location: Loss Angeles
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PostPosted: Mon May 12, 2008 10:05 pm    Post subject: Reply with quote  Mark this post and the followings unread

That's a great Serge-alike! Banana jacks rule.
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numbernone



Joined: Aug 16, 2006
Posts: 477
Location: new york city

PostPosted: Tue May 13, 2008 7:08 am    Post subject: Reply with quote  Mark this post and the followings unread

VERY NICE

Have and pics of the backside?? I am most interested in getting ideas for construction techniques. I seem to change the way I jam it all in everytime I make a new panel.
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lanxe



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

PostPosted: Tue May 13, 2008 7:21 am    Post subject: Reply with quote  Mark this post and the followings unread

i just have this picture of the back during construction. but i think it give you a good idea of how i did it. i thought about mounting the pcb's to the front panel....like i do on my larger motm style synth. but it was just easier for me to get my hands in there with the boards mounted to the wood with nylon spacers.

the boards that go to the top row of the synth are mounted to the top of the cabinet. by the way, if you couldnt tell, i just used the ikea rack that i found out about here on the forums.

Posted Image, might have been reduced in size. Click Image to view fullscreen.
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numbernone



Joined: Aug 16, 2006
Posts: 477
Location: new york city

PostPosted: Tue May 13, 2008 8:23 am    Post subject: Reply with quote  Mark this post and the followings unread

Holy crap, did you wire the programmer sequencer inside the box??? Very interesting, I cant say I have seen PCBs attached to the case before. It does look like it would be easy to fidget with them tho.
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fluxmonkey



Joined: Jun 24, 2005
Posts: 707
Location: cleve

PostPosted: Tue May 13, 2008 8:48 am    Post subject: Reply with quote  Mark this post and the followings unread

here's mine:

Posted Image, might have been reduced in size. Click Image to view fullscreen.

i use it most often as a kind of preset selector on complex self-running patches... dial in 8 different variations that i can then jump-cut between...

bbob
www.fluxmonkey.com
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synth_ollie



Joined: Sep 11, 2006
Posts: 149
Location: sweden

PostPosted: Tue May 13, 2008 8:49 am    Post subject: Reply with quote  Mark this post and the followings unread

lanxe wrote:
here is the overall portable synth i just about finished.


man that looks really great !
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Norman Phay



Joined: Jun 29, 2007
Posts: 176
Location: North-East England
Audio files: 1

PostPosted: Sat Jun 28, 2008 1:01 pm    Post subject: Reply with quote  Mark this post and the followings unread

Wheeee......

Posted Image, might have been reduced in size. Click Image to view fullscreen.

http://www.flickr.com/photos/16804034@N00/2618961254/
http://www.flickr.com/photos/16804034@N00/2618138477/
http://www.flickr.com/photos/16804034@N00/2618139529/
http://www.flickr.com/photos/16804034@N00/2618140773/

The momentary pushbuttons have LEDs built into them. It looks great when it's running!

Row 2 puts out negative voltages as you turn the knobs up, rather than positive ones, otherwise it works 100%. Haven't managed to suss out why as yet. What a great little thing, though! Tons of thanks to Ken for making it available.

The 2 other problems I had were: when it hit stage six, both of the LEDs for stage six and stage seven lit up - this turned out to be a solder whisker shorting two of the board buses together. Also it did a variation on the dude upthread's - it would advance forward to stage seven then stick. It would play backwards fine though. This turned out to be one of the resistors that feeds into the pair of BC557s on board seven having a dry joint. An easy, if slightly fiddly fix.
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mono-poly



Joined: Jul 07, 2004
Posts: 935
Location: Rotterdam, Netherlands
Audio files: 2

PostPosted: Sun Jun 29, 2008 2:29 am    Post subject: Reply with quote  Mark this post and the followings unread

That looks really great Norman.
Is it for your Wiard?
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Norman Phay



Joined: Jun 29, 2007
Posts: 176
Location: North-East England
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PostPosted: Sun Jun 29, 2008 3:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

mono-poly wrote:
That looks really great Norman.
Is it for your Wiard?


Yes, it is, it goes at the bottom, beside the noise ring, joystick axis generator and joystick.

I got it mainly fixed & running, there's a couple of small niggles to sort out, nothing serious though. It's a great little piece, works very well & lots of fun. I recorded this tonight, just messing around, every track uses the sequencer/programmer.


cgs_seq.mp3
 Description:
noodlings using the Ken Stone DIY sequencer/programmer module

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mono-poly



Joined: Jul 07, 2004
Posts: 935
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PostPosted: Sun Jun 29, 2008 3:28 pm    Post subject: Reply with quote  Mark this post and the followings unread

Sweet Smile
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widdly



Joined: Jun 25, 2007
Posts: 268
Location: singapore
G2 patch files: 2

PostPosted: Fri Jul 11, 2008 3:13 am    Post subject: Reply with quote  Mark this post and the followings unread

The serge TKB have sequencing of rows as well as columns.

You could add this using a CD4051 and CD4520

Feed each of the row outs to the analog inputs of the CD4051.

Connect the bcd outputs of the 4520 counter to the bcd inputs on the 4051.

Clock the 4051 from step 1 gate output.

Now your 8 x 4 also has a 64 step output.

Last edited by widdly on Thu Aug 05, 2010 10:12 pm; edited 1 time in total
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krisp14u



Joined: Nov 11, 2006
Posts: 206
Location: uk

PostPosted: Sat Jul 26, 2008 8:56 am    Post subject: Reply with quote  Mark this post and the followings unread

numbernone wrote:

I loved building this, a real gas. Like a ship in a bottle.


Having just finished my 5U format CGS – 59 I know exactly what you mean

Posted Image, might have been reduced in size. Click Image to view fullscreen.Posted Image, might have been reduced in size. Click Image to view fullscreen.
I had one board out of 8 not working right it was a tiny solder bridge which would have taken 30 seconds to find but had to dismantle and reassemble the whole thing from the panel that’s 2 hours I’m not getting back Shocked

Posted Image, might have been reduced in size. Click Image to view fullscreen.Posted Image, might have been reduced in size. Click Image to view fullscreen.
Very Happy Very Happy Very Happy all working good now though Very Happy Very Happy Very Happy

Cheers Ken another fantastic module
Posted Image, might have been reduced in size. Click Image to view fullscreen.Posted Image, might have been reduced in size. Click Image to view fullscreen.

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Paul Darlow

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neandrewthal



Joined: May 11, 2007
Posts: 672
Location: Canada

PostPosted: Sat Jul 26, 2008 10:32 am    Post subject: Reply with quote  Mark this post and the followings unread

Wonderful work all of you! It looks like a piece of cake to build (except Norman's, it's funny how the pcb mounted pots work against you when you don't have enough panel space the boards) compared to other sequencers.

Krisp, is that 5U wide as well, or is my widescreen monitor playing tricks on me?

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krisp14u



Joined: Nov 11, 2006
Posts: 206
Location: uk

PostPosted: Sat Jul 26, 2008 11:06 am    Post subject: Reply with quote  Mark this post and the followings unread

Yes its 5 up 5 across

Also just finished off a 4U across CGS-33 bipolar matrix mixer

That’s 9U of CGS goodness all in one day Smile

I think I deserve a beer
beer

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Paul Darlow

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Norman Phay



Joined: Jun 29, 2007
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PostPosted: Sat Jul 26, 2008 3:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

Woah Krisp, that looks totally awesome!
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Blue Hell
Site Admin


Joined: Apr 03, 2004
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PostPosted: Sat Jul 26, 2008 3:26 pm    Post subject: Reply with quote  Mark this post and the followings unread

krisp14u wrote:
I think I deserve a beer


Certainly and another one, as it looks good too.

beer

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