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jbeuckm
Joined: Nov 30, 2008 Posts: 165 Location: Stockholm
Audio files: 9
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Posted: Tue Dec 08, 2015 10:32 pm Post subject:
EFM VCF 4622 Moog Taurus type Transistor Ladder |
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This layout is verified. The cutoff pot should be connected to -12v instead of ground to completely close the filter.
Files: https://github.com/jbeuckm/EFM_VCF_4622
(image updated with the fix now)
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isak
Joined: Dec 13, 2009 Posts: 847 Location: Israel
Audio files: 18
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Sebo
Joined: Apr 27, 2007 Posts: 564 Location: Argentina
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isak
Joined: Dec 13, 2009 Posts: 847 Location: Israel
Audio files: 18
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jbeuckm
Joined: Nov 30, 2008 Posts: 165 Location: Stockholm
Audio files: 9
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Posted: Mon Jan 04, 2016 9:10 am Post subject:
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I built one to test the general layout, but the one on Github is modified a lot since then. It worked, but the early layout needed a kludge to get -12v to the freq pot. I need to verify the newer version soon. |
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isak
Joined: Dec 13, 2009 Posts: 847 Location: Israel
Audio files: 18
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jbeuckm
Joined: Nov 30, 2008 Posts: 165 Location: Stockholm
Audio files: 9
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LFLab
Joined: Dec 17, 2009 Posts: 497 Location: Rosmalen, Netherlands
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Posted: Sat Jan 23, 2016 2:09 am Post subject:
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While at lunch break the other day, I added the Taurus VCA to this (you still have another ota in the lm13700).
I have a github account, just can't figure out how to create repositories for my stuff. Will share when i can get github going. |
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bamboombaps
Joined: Oct 23, 2015 Posts: 66 Location: Glasgow
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Posted: Mon Jan 25, 2016 3:42 am Post subject:
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let me know when you do id like to have a look |
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jbeuckm
Joined: Nov 30, 2008 Posts: 165 Location: Stockholm
Audio files: 9
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Posted: Mon Jan 25, 2016 8:34 am Post subject:
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LFLab - that would be excellent. Git has a learning curve but it's the perfect way to work on this stuff. Here is a good way to proceed with your addon:
-- Log in to Github.
-- Go to my repository and "fork" it. This makes a copy into your Github account. There is a "fork" button in the upper right of the Github page.
-- "Clone" the new repository onto your computer. This requires some kind of Git client software - you might use Github's client or install the command line version of Git (I show some example command lines below).
[git clone git@github.com:lflab/EFM_VCF_4622.git]
-- Overwrite the downloaded schematic and board files with your new ones.
-- "Commit" the new files with Git, adding a message to describe the changes.
[git commit -a -m "added Taurus VCA"]
-- "Push" back up to Github to publish your results.
[git push origin master]
At that point your Github account will hold the updated version. If you wanted to, you could submit a "pull request" to tell me (publisher of the original repo that you forked) that your update is ready to incorporate into the original repo.
Here is a helpful Git tutorial: https://try.github.io/levels/1/challenges/1 |
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LFLab
Joined: Dec 17, 2009 Posts: 497 Location: Rosmalen, Netherlands
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Posted: Wed Jan 27, 2016 1:50 am Post subject:
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Oh, I'd already created my own Github repo's.
I installed Github Desktop, and if I open a repo, I can see the contents, but I can't seem to be able to publish them, I get a "failed to sync" error, saying that the repo needs to be debugged. To be honest, it could be the firewall I am behind at work, I'll take my pc home and retry.
But I am staying away from commandlines and such, if there's something handy as dropbox, which works great (I do appreciate revision control, it's a major part of my work, but for small projects like this, well, maybe it's more trouble than it's worth).
This is what I have now:
Double sided, the red dotted outline is a ground plane (it shows fully red after pressing the rats nest button, but I find that's not helpful when checking the routing) |
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jbeuckm
Joined: Nov 30, 2008 Posts: 165 Location: Stockholm
Audio files: 9
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Posted: Thu Jan 28, 2016 8:59 am Post subject:
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Cool LFLab!
Warning: I drew the Erthenvar jacks and they are not tested for manufacturing. I would like to have used slots, but I use overlapping holes because that's what the "pcbgcode" ULP can handle and it works on my CNC router. |
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LFLab
Joined: Dec 17, 2009 Posts: 497 Location: Rosmalen, Netherlands
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Posted: Fri Jan 29, 2016 1:46 am Post subject:
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Yes, those slots did have me wondering, and I don't think iTEAD allows milling contours, figured I can always take a needle file and open up the two holes. |
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jbeuckm
Joined: Nov 30, 2008 Posts: 165 Location: Stockholm
Audio files: 9
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Posted: Fri Jan 29, 2016 7:18 am Post subject:
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If they do allow overlapping holes, these three work perfectly well with no manual adjustment.
I tried to overlap .04" holes but kept breaking the bit, so these are .052 |
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n.d
Joined: Dec 15, 2011 Posts: 52 Location: Talos IV
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Posted: Fri Feb 12, 2016 11:55 am Post subject:
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I`m somewhat lost. Is the VCF+VCA version available?
If so, is it tested? |
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LFLab
Joined: Dec 17, 2009 Posts: 497 Location: Rosmalen, Netherlands
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Posted: Sat Feb 13, 2016 10:06 am Post subject:
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Build one and find out! Do you have experience? Shouldn't be too hard. |
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n.d
Joined: Dec 15, 2011 Posts: 52 Location: Talos IV
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Posted: Wed Feb 17, 2016 2:31 pm Post subject:
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LFLAB: yes, I have experience.
What I meant to ask is if the layout is available.
If i get to be the first builder, I`ll gladly share my experience with everybody. |
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LFLab
Joined: Dec 17, 2009 Posts: 497 Location: Rosmalen, Netherlands
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Posted: Thu Feb 18, 2016 2:46 am Post subject:
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Eagle files EFM4622
Here are my Eagle files, keep us updated on your progress. |
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LFLab
Joined: Dec 17, 2009 Posts: 497 Location: Rosmalen, Netherlands
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Posted: Thu Mar 03, 2016 2:28 am Post subject:
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Hey n.d., are you managing to build this thing? |
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masterofstuff124
Joined: Sep 21, 2015 Posts: 23 Location: Miami, Florida
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Posted: Sun Apr 24, 2016 10:59 am Post subject:
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planning on building one of these Up. LF labs looks like its missing several connections and ground. some of the components are not connected to anything. So ill most likely build the original. Ill also just etch it instead of getting many boards made. |
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LFLab
Joined: Dec 17, 2009 Posts: 497 Location: Rosmalen, Netherlands
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Posted: Sun Apr 24, 2016 1:47 pm Post subject:
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That's because it has a groundplane, which is not shown in the picture for clarity).
Let me know if you'd like the eagle files. |
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masterofstuff124
Joined: Sep 21, 2015 Posts: 23 Location: Miami, Florida
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Posted: Sun Apr 24, 2016 4:01 pm Post subject:
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is it just the same file that you posted earlier? i was looking at that one in eagle. |
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LFLab
Joined: Dec 17, 2009 Posts: 497 Location: Rosmalen, Netherlands
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Posted: Sun Apr 24, 2016 10:29 pm Post subject:
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Ah, yes, I posted it earlier. I have changed some things, added trimmers for self resonance (based on frequency centrals raging bull).
I'll upload the latest version tonight.
Regarding the ground plane, push the rats nest button in eagle and it should be filled in.
Edit: Updated files in my dropbox!
Eagle files EFM4622 |
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LFLab
Joined: Dec 17, 2009 Posts: 497 Location: Rosmalen, Netherlands
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Posted: Sat Jul 29, 2017 5:51 am Post subject:
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And so, more than a year later, I shuffled some components, added a two pole connection and some holes so a daughterboard can be added to also have the two pole output available. And, I finally ordered some boards!
Did anyone else?
I can put the Eagle files in my dropbox once more, I've given up on Github. |
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n.d
Joined: Dec 15, 2011 Posts: 52 Location: Talos IV
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Posted: Sun Aug 13, 2017 1:46 pm Post subject:
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Hi LFLab. Notification on your reply never came. I'll build it as soon as I can. Sorry.
Edit: if you can, upload the new design please. |
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