Would you prefer one PCB with 3 VCOs a la JH-5A, or 1 VCO per PCB with more features |
One PCB with Oscillator Driver and 3 VCO cores (like JH-5A - cheap!) |
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60% |
[ 62 ] |
1 PCB = 1 VCO (with many waveforms and inputs) |
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39% |
[ 41 ] |
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Total Votes : 103 |
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saint gillis
Joined: Apr 21, 2012 Posts: 60 Location: Brussels
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Posted: Thu Jun 07, 2012 6:03 am Post subject:
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Thanx for your precious help! Although the result seems very satisfying I m sure it can be tweaked again by really qualified people, I ll tell you if I see collateral damages using syncro |
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saint gillis
Joined: Apr 21, 2012 Posts: 60 Location: Brussels
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Posted: Sun Jul 08, 2012 9:21 pm Post subject:
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Hello!
Just to tell that I m using it very often and it really works very well! |
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bennethos
Joined: Apr 18, 2009 Posts: 31 Location: Belgium
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Posted: Mon Dec 31, 2012 8:09 am Post subject:
waveshaper |
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Hey guys,
I would like to include some other waveshapes besides the default Pulse & saw.
Which one would you guys consider ?
thx |
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saint gillis
Joined: Apr 21, 2012 Posts: 60 Location: Brussels
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The Peasant
Joined: Nov 13, 2009 Posts: 99 Location: Sunny Alberta
Audio files: 1
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Posted: Tue Jan 01, 2013 11:16 am Post subject:
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There is a schematic for adding triangle and sine outputs on page 12 of this thread and a stripboard layout for that on page 17.
Take care,
Doug _________________ The Electronic Peasant
www.electronicpeasant.com |
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The Bad Producer
Joined: Mar 08, 2009 Posts: 282 Location: The Manhole
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Posted: Tue Jan 01, 2013 3:49 pm Post subject:
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I added that circuit (thanks Peasant!) and it works really well, couldn't imagine the VCO's without the other waves! _________________ http://loudestwarning.tumblr.com/ |
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MarcMooga
Joined: Jan 31, 2013 Posts: 1 Location: Bremen
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Posted: Thu Jan 31, 2013 6:21 am Post subject:
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Hi,
I am also about to finish the great sounding Living VCOs and I would like to add that Hard Sync feature.
My knowledge level is limited, but I am trying to improve day by day.
Here is my drawing... it would be great if anybody can confirm:
Thank you!
regards,
Marc |
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saint gillis
Joined: Apr 21, 2012 Posts: 60 Location: Brussels
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Posted: Wed Feb 13, 2013 3:35 am Post subject:
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Hello Marc!
I don't have an original PCB made by the great Jurgen himself so I can't check myself if everything is correct, but it looks like there is a mistake where I ve put a red cross :
This part of the additional circuit should be connected on R20 resistor as you can see here (not on IC3's pin2) :
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oldenjon
Joined: May 18, 2012 Posts: 6 Location: Santa Cruz, CA
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Posted: Sat May 18, 2013 2:08 pm Post subject:
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Any news about the availability of PCBs for this project? I'm very eager to build one. |
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sonicwarrior
Joined: Dec 22, 2005 Posts: 266 Location: Cologne, Germany
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Luka
Joined: Jun 29, 2007 Posts: 1003 Location: Melb.
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bIG joB heAd
Joined: Jul 11, 2013 Posts: 1 Location: France
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Posted: Thu Jul 11, 2013 5:21 am Post subject:
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Hello,
i bought a filled PCB of a living VCO a few days ago.
I did the modifications to power it in +/-12V and it works like a charm and now i'd like to add the waveshapers but i'm a little confused about a few things.
As i understand, the waveshapers have an amp stage for each waveform so i can plug the outputs jacks directly there and use the spare amps on the driver section to amplify the pulse out.
Do i need to change some resistor values to adapt the waveshapers to 12V?
Thanks for any help
Flavien |
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evengravy
Joined: Aug 10, 2013 Posts: 3 Location: ireland
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sduck
Joined: Dec 16, 2007 Posts: 459 Location: Nashville
Audio files: 5
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Posted: Sat Aug 10, 2013 6:15 pm Post subject:
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On the actual pcb, those connections are to ground, not -v |
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evengravy
Joined: Aug 10, 2013 Posts: 3 Location: ireland
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Posted: Sun Aug 11, 2013 10:34 am Post subject:
thanks |
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Thanks a lot for clearing that up, think I've got it cracked now can't wait to try it out! |
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oldenjon
Joined: May 18, 2012 Posts: 6 Location: Santa Cruz, CA
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Posted: Fri Aug 23, 2013 1:11 pm Post subject:
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Does anyone know if keeping the values of all resistors at 1% tolerance is critical in this circuit? Aside from the matched resistors of course. |
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saint gillis
Joined: Apr 21, 2012 Posts: 60 Location: Brussels
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Posted: Sat Feb 28, 2015 8:56 pm Post subject:
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Don't think so... |
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numbertalk
Joined: May 05, 2008 Posts: 992 Location: Austin, TX
Audio files: 5
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Posted: Mon Jan 25, 2016 8:50 pm Post subject:
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I built a 5U version of the Living VCOs circuit many years ago when JH first started selling the boards. I had never noticed this before but I am getting what I guess I'd call drift in the 3 oscillators. I remember this circuit being pretty stable, but now when I tune all 3 together with no detune on any of them, within seconds or a minute at most, they are each noticeably sharp or flat from each other. Not so out of tune that I couldn't play it, it's a nice an analog beating sound, but it's not what I'm tuning it for in this instance. Not looking for super stability but this is clearly not right.
I built it to his spec and used tempcos with thermal paste. It was particularly hot today, but I've had my modular on for 2-3 days and it's been a pretty consistent temperature all day. Could it be the verniers? I've noticed when I tune it using a strobe tuner that it seems almost a tiny bit sluggish at times to catch up with where I've tuned to. For example, if I'm trying to slightly bump it sharp because it's showing to be somewhat flat, it looks to me as though it gets to be just about in tune but then jumps a bit sharp. However even if I leave those alone and try to fine tune with the detune knob on each, it still ends up drifting. This isn't a scaling issue - I'm doing this to a single droning note I'm just trying to get all 3 VCOs tuned to in unison and I'm watching and hearing them drift out of tune rather quickly.
Any thoughts appreciated or suggestions much appreciated, thanks! |
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saint gillis
Joined: Apr 21, 2012 Posts: 60 Location: Brussels
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Posted: Wed May 17, 2017 4:25 am Post subject:
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Hi, the imageshack pics have disappeared, I think this was the synchro circuit : |
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cleaninglady
Joined: Dec 01, 2010 Posts: 13 Location: creeping up behind you...
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