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 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Zodiak - Soundlab-Z
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Zodiak



Joined: May 20, 2007
Posts: 242
Location: Gillingham, Kent UK

PostPosted: Sat Nov 30, 2013 5:29 pm    Post subject: Zodiak - Soundlab-Z Reply with quote  Mark this post and the followings unread

Posted Image, might have been reduced in size. Click Image to view fullscreen.
This is designed to be a 72h Eurorack module. The mounting holes are there but have not been cut through the laminate yet.
The sellotape on the corners is there while I am working on it to protect the laminate.
The Z is the suffix to show the additions I have made Very Happy
LFO - Rate in fast mode reduced to 30-0.05 Hz, LED, Inverted output on traingle
AR - Threshold level on external input, LED, inverted output on AR, Attack/On phase output.
VCO1 - Duplicate of VCO2
VCO2 - Trig input via capacitor so it triggers on any square wave, triangle out put via Rays circuit
VCF - Control front end modified for logarithmic response (untested)
VCA - Control front end modified for logarithmic response (untested)
Control inputs on VCOs, audio and control on VCF and VCA have one direct socket (input 1) with no attenuator and at least one socket with an attenuator
All outputs via 1K resistor to eliminate problems with shorts, and multiple outputs can be directly connected together.
The Stig sticker is not staying Wink

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Skrog Productions



Joined: Jan 07, 2009
Posts: 774
Location: Scottish Borders
Audio files: 87

PostPosted: Sun Dec 01, 2013 4:23 am    Post subject: Reply with quote  Mark this post and the followings unread

Nice euro style soundlab , many nights of patching fun with this build Smile

Dave.

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Zodiak



Joined: May 20, 2007
Posts: 242
Location: Gillingham, Kent UK

PostPosted: Sun Dec 01, 2013 5:07 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks Dave, and now I can take it all to bits to replace the pots with ones that are not noisy ( see separate post).
I am going to see how difficult it will be to replace the pots and keep the wiring loom in place, but in practice I think it will be easier to start from scratch Crying or Very sad

<<Update>>
I have found a way of mounting alpha pots in the larger holes I drilled for the Omega ones, buy using a 2mm length of plastic pipe.
Posted Image, might have been reduced in size. Click Image to view fullscreen. so it will still be painful and take the best part of a day, but no where near as bad as I thought before.
This means I will also be changing all the knobs to some much nicer looking ones Smile

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Stephen
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Zodiak



Joined: May 20, 2007
Posts: 242
Location: Gillingham, Kent UK

PostPosted: Tue Dec 31, 2013 7:08 pm    Post subject: Reply with quote  Mark this post and the followings unread

In the end I found some nitrile washers, which cost less than £2 and made a nice snug fit. The re-wire took around 12 hours, but I used the opportunity to re-route some of the wiring making it a bit neater.
The alpha pots are MUCH nicer to use but I am going to have to change the knobs now as the gap under the old ones is too much.
Since then I have decided that as this is eurorack, I really ought to change the 4mm bananas to 3.5 mm Jacks so I have just ordered a pack of those too. I reckon that will be about 6 hours work Confused

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