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 Forum index » DIY Hardware and Software
Simmons SDS 3 - DIY?
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arnoid



Joined: Aug 23, 2009
Posts: 55
Location: Belgium

PostPosted: Thu Jun 20, 2013 3:25 am    Post subject: Reply with quote  Mark this post and the followings unread

Nice pcb Jmejia did you add the run generator ?
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jmejia



Joined: Mar 12, 2009
Posts: 114
Location: portland

PostPosted: Thu Jun 20, 2013 4:26 pm    Post subject: Reply with quote  Mark this post and the followings unread

Sweet! Thanks - I'll give it a shot!
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jmejia



Joined: Mar 12, 2009
Posts: 114
Location: portland

PostPosted: Thu Jun 20, 2013 4:33 pm    Post subject: Reply with quote  Mark this post and the followings unread

oh and arnoid - no we are leaving the run generator alone for the moment. Either none of us have gotten it to work right - or it's just not that interesting. It could always be an add-on pcb if someone wants to tackle it! I'm not personally that interested in it...
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xpmtl



Joined: Aug 10, 2007
Posts: 158
Location: Brussels, Belgium

PostPosted: Sat Jun 29, 2013 10:58 am    Post subject: Reply with quote  Mark this post and the followings unread

Populated that today.

Few things to iron out (noise is not working)... And i'll need to make another prototype as i wired the decay pot backwards again Rolling Eyes

More debugging to come Laughing

EDIT : Fixed the noise problem, apparently BC547 doesn't work for the noise circuit here, it does on my thru-hole prototype. Very odd.

I've replace it with a 2N3904 and it works. (Tim i'll send you those in replacement)


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Last edited by xpmtl on Sun Jun 30, 2013 4:43 am; edited 1 time in total
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jmejia



Joined: Mar 12, 2009
Posts: 114
Location: portland

PostPosted: Sat Jun 29, 2013 11:10 am    Post subject: Reply with quote  Mark this post and the followings unread

Looks great xpmtl!

Just sent our prototype gerbers to the fab yesterday. Will update once we get a few boards back!
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nuipb



Joined: Oct 06, 2009
Posts: 18
Location: France

PostPosted: Sat Jun 29, 2013 2:30 pm    Post subject:   Reply with quote  Mark this post and the followings unread

Looks really incredible !
congratulations !!
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THeff



Joined: Sep 01, 2006
Posts: 218
Location: Florida
Audio files: 30

PostPosted: Sun Jun 30, 2013 8:03 pm    Post subject: Reply with quote  Mark this post and the followings unread

Nice clean layout xpmtl!

Four of those PCBs side by side would make a great SDS-3 package.

Great work!

Regards,

-Theff
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xpmtl



Joined: Aug 10, 2007
Posts: 158
Location: Brussels, Belgium

PostPosted: Mon Jul 01, 2013 12:03 am    Post subject: Reply with quote  Mark this post and the followings unread

Thankies !

That was my initial plan Smile (I got 5 pcbs from iTead)

If only I didn't screwed up with the decay pot it would have been perfect Embarassed

Having the shortest decay on CW is a bit odd but i think i'll live with that. I'll just correct this issue for the gerbers i'll share.

I'll send the front panel design to engraving this week so i can test if it fits.

x.

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Heavy Metal Kid



Joined: Nov 05, 2012
Posts: 18
Location: Oslo

PostPosted: Mon Jul 01, 2013 11:13 am    Post subject: Reply with quote  Mark this post and the followings unread

Looks good!
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nuipb



Joined: Oct 06, 2009
Posts: 18
Location: France

PostPosted: Mon Jul 01, 2013 11:22 am    Post subject: Reply with quote  Mark this post and the followings unread

I don't remember reading this info in the thread but what is format you are planning to be build it for ? Stand alone ? Doepfer ? SDS-V ? other ?...
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xpmtl



Joined: Aug 10, 2007
Posts: 158
Location: Brussels, Belgium

PostPosted: Sat Jul 06, 2013 4:11 am    Post subject: Reply with quote  Mark this post and the followings unread

I think jmejia is doing an universal board that will work for all formats, an I think he will sell those.

Mine is 1U MOTM format, but i won't sell them. All the info and gerbers files are free to download on my site (sdiy.xpmtl.net). You'll have to send the gerbers to a fab house and source/populate the boards yourself.

Cheers,

x.

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diablojoy



Joined: Sep 07, 2008
Posts: 795
Location: melbourne australia
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PostPosted: Sun Jul 07, 2013 3:03 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
Mine is 1U MOTM format, but i won't sell them. All the info and gerbers files are free to download on my site (sdiy.xpmtl.net). You'll have to send the gerbers to a fab house and source/populate the boards yourself.


very nice layout xpmtl
MOTM format should work well for me
great work.

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nuipb



Joined: Oct 06, 2009
Posts: 18
Location: France

PostPosted: Sun Jul 07, 2013 4:53 pm    Post subject: Reply with quote  Mark this post and the followings unread

OK thanks. Hopefully I find someone with the knowledge to build one for me. I can barely resolder a bad cable...
What are the different voltages required from the power supply ?
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arnoid



Joined: Aug 23, 2009
Posts: 55
Location: Belgium

PostPosted: Mon Jul 08, 2013 5:21 am    Post subject: Reply with quote  Mark this post and the followings unread

xpmtl wrote:
I think jmejia is doing an universal board that will work for all formats, an I think he will sell those.

Mine is 1U MOTM format, but i won't sell them. All the info and gerbers files are free to download on my site (sdiy.xpmtl.net). You'll have to send the gerbers to a fab house and source/populate the boards yourself.

Cheers,

x.


Is it possible to make a sound demo of your version ? Smile

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xpmtl



Joined: Aug 10, 2007
Posts: 158
Location: Brussels, Belgium

PostPosted: Mon Jul 08, 2013 7:02 am    Post subject: Reply with quote  Mark this post and the followings unread

nuipb wrote:

What are the different voltages required from the power supply ?


+/-15VDC

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xpmtl



Joined: Aug 10, 2007
Posts: 158
Location: Brussels, Belgium

PostPosted: Mon Jul 08, 2013 7:04 am    Post subject: Reply with quote  Mark this post and the followings unread

arnoid wrote:
Is it possible to make a sound demo of your version ? Smile


As soon as i got the frontpanel done, i'll try to make one.

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nuipb



Joined: Oct 06, 2009
Posts: 18
Location: France

PostPosted: Mon Jul 08, 2013 7:46 am    Post subject: Reply with quote  Mark this post and the followings unread

xpmtl wrote:
nuipb wrote:

What are the different voltages required from the power supply ?


+/-15VDC


Then I guess it cannot be installed in a Doepfer system right ? They supply at most 12v as far as I know...
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jmejia



Joined: Mar 12, 2009
Posts: 114
Location: portland

PostPosted: Mon Jul 08, 2013 11:32 am    Post subject: Reply with quote  Mark this post and the followings unread

We should get our protos soon and are planning on testing with +/-12 in addition to +/-15 to see if it works - but nuipb, it sounds like 12 is working fine per xpmtl.

We have a euro connector on the board, as well as an MOTM connector, but no pcb-mount components, and no real consideration to mounting or pcb size apart from some arbitrary mounting screw holes in the corner. So it'll be DIY in terms of getting it to fit in whatever your system is.

We'll sell pcbs, but we'll also make our layout available.
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nuipb



Joined: Oct 06, 2009
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PostPosted: Wed Jul 10, 2013 4:09 pm    Post subject: Reply with quote  Mark this post and the followings unread

OK thanks. Looking forward to hear about your further tests then...
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jmejia



Joined: Mar 12, 2009
Posts: 114
Location: portland

PostPosted: Sat Jul 13, 2013 11:17 am    Post subject: Reply with quote  Mark this post and the followings unread

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



Joined: Aug 10, 2007
Posts: 158
Location: Brussels, Belgium

PostPosted: Sun Jul 14, 2013 1:05 am    Post subject: Reply with quote  Mark this post and the followings unread

nice board!

what size is it? looks small

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jmejia



Joined: Mar 12, 2009
Posts: 114
Location: portland

PostPosted: Mon Jul 15, 2013 1:47 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks! It's 102.57x83.82 mm (about 4" by 3.30")

Waiting on some parts still to populate and test.
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jmejia



Joined: Mar 12, 2009
Posts: 114
Location: portland

PostPosted: Wed Aug 07, 2013 1:10 pm    Post subject: Reply with quote  Mark this post and the followings unread

Small update here. Our prototype has some issues and is not oscillating. Noise, envelope, trigger and lfo circuits seem to be working.. although the grounding pots don't seem to remove either the noise nor the lfo.

We recycled the ca3046s and the jfets from our first rev.. so first order of troubleshooting is ordering fresh parts and trying them out. More on that front soon...
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xpmtl



Joined: Aug 10, 2007
Posts: 158
Location: Brussels, Belgium

PostPosted: Thu Aug 08, 2013 3:50 am    Post subject: Reply with quote  Mark this post and the followings unread

You can check if the 3046 are ok using the voltages Tim has posted on page 10, If you have them right then it's probably the Fets. From memory you should get 10.80V, 7.8V and 15V on the Fets legs.

X

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mono-poly



Joined: Jul 07, 2004
Posts: 935
Location: Rotterdam, Netherlands
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PostPosted: Wed Aug 14, 2013 7:13 am    Post subject: Reply with quote  Mark this post and the followings unread

xpmtl wrote:
I think jmejia is doing an universal board that will work for all formats, an I think he will sell those.

Mine is 1U MOTM format, but i won't sell them. All the info and gerbers files are free to download on my site (sdiy.xpmtl.net). You'll have to send the gerbers to a fab house and source/populate the boards yourself.

Cheers,

x.


Woow great work!
Looking forward to your gerber files!
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