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Skrog Productions
Joined: Jan 07, 2009 Posts: 1196 Location: Scottish Borders
Audio files: 155
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DES
Joined: Feb 28, 2003 Posts: 794 Location: New Jersey
Audio files: 8
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Posted: Sun Jan 17, 2016 12:07 pm Post subject:
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Wow those look nice! _________________ Dave
www.davesneed.com |
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LFLab
Joined: Dec 17, 2009 Posts: 497 Location: Rosmalen, Netherlands
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Posted: Wed Jan 20, 2016 2:53 am Post subject:
Re: TH cmos ADSRs & LFOs Subject description: Thomas Henry ADSR & LFO cmos555 .... in Blue |
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Skrog Productions wrote: | ...the 2 x 47K to pin 6 - resistor mod |
They look great! What's this mod you are talking about?
I used that schematic to make these:
Based on these boards:
Almost all actives are SMT. Works great, I really like these ADSR's, I do feel that they are better suited to slow stuff though, could be the combination of capacitor and slider values (I couldn't get 500k so I used 1M, and used 470nF rather than 1uF for the cap). |
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Skrog Productions
Joined: Jan 07, 2009 Posts: 1196 Location: Scottish Borders
Audio files: 155
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Posted: Thu Jan 21, 2016 1:43 pm Post subject:
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DES wrote: | Wow those look nice! |
Thanks dave |
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Skrog Productions
Joined: Jan 07, 2009 Posts: 1196 Location: Scottish Borders
Audio files: 155
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Posted: Thu Jan 21, 2016 1:58 pm Post subject:
Re: TH cmos ADSRs & LFOs Subject description: Thomas Henry ADSR & LFO cmos555 .... in Blue |
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LFLab wrote: | Skrog Productions wrote: | ...the 2 x 47K to pin 6 - resistor mod |
They look great! What's this mod you are talking about?
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Thanks
I built these using the bright red pcb's , Matthias sold a few years ago.
The 47K mod , on Mw site , I followed the cmos555 ADSR thread by Matthias and near the end pages there is a discussion about the lfo function , on my unit when I first built & tested it had the same problem when turning the attack or decay back to CCW and it froze the lfo , by bending pin 6 of the opamp up from my socket and soldering a 47K to ground and another to +V it made that section into a comparator and allowed the lfo to not freeze .
Wow , your module looks nice with the led tipped faders , good job , and the pcb looks tiny , nice
, my modules are 100mm by 250mm , I have plenty space round back for my nests of wiring
Dave. |
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Skrog Productions
Joined: Jan 07, 2009 Posts: 1196 Location: Scottish Borders
Audio files: 155
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Posted: Thu Jan 21, 2016 2:04 pm Post subject:
Re: TH cmos ADSRs & LFOs Subject description: Thomas Henry ADSR & LFO cmos555 .... in Blue |
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LFLab wrote: | I really like these ADSR's, I do feel that they are better suited to slow stuff though, could be the combination of capacitor and slider values (I couldn't get 500k so I used 1M, and used 470nF rather than 1uF for the cap). |
Yes , when I tried them using a midi to cv/gate converter to play long notes & mono pads from the korg-X5, they were great |
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LFLab
Joined: Dec 17, 2009 Posts: 497 Location: Rosmalen, Netherlands
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Posted: Fri Jan 22, 2016 8:29 am Post subject:
Re: TH cmos ADSRs & LFOs Subject description: Thomas Henry ADSR & LFO cmos555 .... in Blue |
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Skrog Productions wrote: |
Wow , your module looks nice with the led tipped faders , good job , and the pcb looks tiny , nice
, my modules are 100mm by 250mm , I have plenty space round back for my nests of wiring
Dave. |
Hey Dave, thanks! This is it in action (without front panel).
quick youtube demo
PCB is pretty tiny, it was a bear to route all the tracks (also because of the sliders on one side and SMT on the other side), but when building it, it is actually not that great a number of components, a pretty quick project to build. I am a bit surprised that not more people report about building it.
I didn't implement the end of stage outputs, so mine doesn't cycle. |
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