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questionable
Joined: Aug 27, 2006 Posts: 42 Location: southern california
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Posted: Sat Mar 05, 2011 1:10 pm Post subject:
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Thanks, Yves, for the nice redesign. I've just etched 3 boards this morning and will be building them shortly. _________________ Sounds Questionable |
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furio
Joined: Dec 25, 2009 Posts: 106 Location: Austria
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yusynth
Joined: Nov 24, 2005 Posts: 1314 Location: France
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Posted: Fri Jul 15, 2011 9:50 am Post subject:
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Excellent _________________ Yves |
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iopop3
Joined: May 28, 2010 Posts: 94 Location: Malmö, Sweden
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Posted: Wed Nov 30, 2011 1:12 am Post subject:
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Started on my ADSR boards last weekend, noticed a tiny error in the bom.
The number of 1N4148s should be 5 not 4. D5 is missing.
Also the D5 configuration is quite interesting, whats the purpose? I can think of a few reasons, but none of them feels right. |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Posted: Sun Jul 08, 2012 10:57 am Post subject:
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Just built a dual one of these in my 5U Serge-style format. Besides the usual blemishing on the panel from acid eating away irregularly, I think they turned out great. They work very well! Thanks for the excellent design, Yves
When I first built them, my LEDs were not working. I did observe correct envelope generation on my oscilloscope, though, so was confused. I did some searching and found the thread where you described that the LED and D5 were reverse biased. I swapped them around and now they work great
Here are a couple of photos!
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_________________ hexinverter.net -- Shop DIY projects and modules for modular synthesis
sympleSEQ -- the simple to build analog step-sequencer
seqSQUARED -- the Analogue Pattern Generator
--> Put yourself on the hexinverter.net mailing list to be notified when in stock! |
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El Mop
Joined: Aug 20, 2012 Posts: 56 Location: Germany
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Posted: Sun Dec 09, 2012 11:14 am Post subject:
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Same Problem here.
Working envelope but not the LED.
Could not find that thread with the search function.
Do I just have to change the direction of both, the LED and the diode?
Thank you. |
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HexInverter
Joined: Aug 21, 2010 Posts: 338 Location: Canada
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Posted: Sun Dec 09, 2012 11:16 am Post subject:
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El Mop wrote: | Same Problem here.
Working envelope but not the LED.
Could not find that thread with the search function.
Do I just have to change the direction of both, the LED and the diode?
Thank you. |
I am pretty sure I changed both...it's been awhile though!!! I kinda forgot _________________ hexinverter.net -- Shop DIY projects and modules for modular synthesis
sympleSEQ -- the simple to build analog step-sequencer
seqSQUARED -- the Analogue Pattern Generator
--> Put yourself on the hexinverter.net mailing list to be notified when in stock! |
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himijendrix
Joined: Apr 16, 2012 Posts: 18 Location: Germany
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Posted: Fri Jul 12, 2013 7:25 am Post subject:
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Hello, I built two of Yusynth's ADSR modules.
But since a while I use a Korg Electribe to play Midi notes, the problem i have now, is that the ADSR only has a GATE Input.
So when the Electribe sends a Midi On + a short Gate the ADSR's envelope only lasts for this short Gate time. So I can't produce long period envelopes. A Solution would be a Trigger Input for the ADSR, right? Any Ideas how to do this? |
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gdavis
Joined: Feb 27, 2013 Posts: 359 Location: San Diego
Audio files: 1
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Posted: Fri Jul 12, 2013 10:05 am Post subject:
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JE wrote: | Hello, I built two of Yusynth's ADSR modules.
But since a while I use a Korg Electribe to play Midi notes, the problem i have now, is that the ADSR only has a GATE Input.
So when the Electribe sends a Midi On + a short Gate the ADSR's envelope only lasts for this short Gate time. So I can't produce long period envelopes. A Solution would be a Trigger Input for the ADSR, right? Any Ideas how to do this? |
No, a trigger would just restart the envelope. The gate is what defines the duration of the note, so if you want a longer note, you need to make your gate longer.
How are you generating the gate signal from the electribe? As far as I can tell it doesn't have this feature built in. _________________ My synth build blog: http://gndsynth.blogspot.com/ |
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himijendrix
Joined: Apr 16, 2012 Posts: 18 Location: Germany
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Posted: Fri Jul 12, 2013 2:39 pm Post subject:
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With the Electrictribe TR-1 you can select a MIDI Note for each pattern, which is sent to the MIDI Out whenever the pattern is played. But Gate time and Velocity is fixed and can't be changed.
The Music From Outer Space Mini Synth has a trigger Input, which means that when a short Gate Signal/Trigger is sent to the ADSR it will run thorugh the whole Attack Decay Sustain Release Cycle... |
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elmegil
Joined: Mar 20, 2012 Posts: 2177 Location: Chicago
Audio files: 16
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Posted: Fri Jul 12, 2013 3:24 pm Post subject:
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The minisynth has no sustain phase when it's in triggered mode. it's just attack-release. |
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gdavis
Joined: Feb 27, 2013 Posts: 359 Location: San Diego
Audio files: 1
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Posted: Sun Jul 14, 2013 9:22 am Post subject:
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JE wrote: | With the Electrictribe TR-1 you can select a MIDI Note for each pattern, which is sent to the MIDI Out whenever the pattern is played. But Gate time and Velocity is fixed and can't be changed.
The Music From Outer Space Mini Synth has a trigger Input, which means that when a short Gate Signal/Trigger is sent to the ADSR it will run thorugh the whole Attack Decay Sustain Release Cycle... |
I see what you're saying about the MFOS ADSR. I hadn't seen that before, that's actually a pretty neat feature.
I'm sure the YuSynth ADSR could be modified with the same feature but I'm not familiar enough with the circuit to come up with an efficient way so hopefully Yves or someone else can help.
I still don't understand how you're getting from the midi output to a gate/trigger. Depending on that, you might have some other options for creating a longer gate signal that lets the ADSR go through it's cycle. _________________ My synth build blog: http://gndsynth.blogspot.com/ |
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yusynth
Joined: Nov 24, 2005 Posts: 1314 Location: France
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Posted: Mon Jul 15, 2013 11:33 am Post subject:
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You can use a yusynth PULSE delay for this : http://yusynth.net/Modular/index_en.html
This module will let you set the duration of a GATE cycle when triggered with a brief trigger. Set the delay knob to its minimum and adjust the duration of the GATE OUT with the WIDTH knob (from 1ms to 1s). _________________ Yves |
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Starspawn
Joined: Jun 14, 2013 Posts: 85 Location: Oslo
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Posted: Fri Aug 02, 2013 10:44 pm Post subject:
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I cant find where to order PCBs?
Bridechamber has no ADSR and there is no shop on yusynth site. |
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yusynth
Joined: Nov 24, 2005 Posts: 1314 Location: France
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Posted: Fri Aug 02, 2013 11:57 pm Post subject:
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This is normal Bridechamber did not add it to its shop and personally I don't sell PCBs. You have to do it yourself or find somebody to do it for you.
Regards _________________ Yves Last edited by yusynth on Sat Aug 03, 2013 1:56 am; edited 1 time in total |
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Starspawn
Joined: Jun 14, 2013 Posts: 85 Location: Oslo
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Posted: Sat Aug 03, 2013 1:14 am Post subject:
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Ah, ok, thanks for the great design in any case
Any stripboard versions around? |
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col2
Joined: Feb 15, 2014 Posts: 16 Location: Melbourne Australia
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Posted: Sat Feb 15, 2014 4:25 am Post subject:
swapping out the tantulum caps Subject description: swapping out the tantulum caps |
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Hi,
I would like to build 1 maybe 2 of the Yusynth ADSR modules. I was wondering if it is possible to avoid using tantalum caps? Possible swapping them out with electrolytics?
cheers,
col2 |
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gdavis
Joined: Feb 27, 2013 Posts: 359 Location: San Diego
Audio files: 1
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Posted: Sat Feb 15, 2014 8:06 pm Post subject:
Re: swapping out the tantulum caps Subject description: swapping out the tantulum caps |
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col2 wrote: | Hi,
I would like to build 1 maybe 2 of the Yusynth ADSR modules. I was wondering if it is possible to avoid using tantalum caps? Possible swapping them out with electrolytics?
cheers,
col2 |
Tantalum is used because of it's high capacitance and low leakage which are both important factors in long duration timing circuits like an ADSR. The higher leakage of aluminum electrolytics will negatively affect the performance of the ADSR. By how much I couldn't say, and I don't think there would be any other issues with using aluminum electrolytic so shouldn't hurt to try it and see how it works. _________________ My synth build blog: http://gndsynth.blogspot.com/ |
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col2
Joined: Feb 15, 2014 Posts: 16 Location: Melbourne Australia
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Posted: Sun Feb 16, 2014 2:04 am Post subject:
Re: swapping out the tantulum caps Subject description: swapping out the tantulum caps |
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gdavis wrote: |
Tantalum is used because of it's high capacitance and low leakage which are both important factors in long duration timing circuits like an ADSR. The higher leakage of aluminum electrolytics will negatively affect the performance of the ADSR. By how much I couldn't say, and I don't think there would be any other issues with using aluminum electrolytic so shouldn't hurt to try it and see how it works. |
Thanks for that, will give it a go and see what happens, I have some nice Starget and Nichicon ELNAs to try. I went to print out the PCB pcf file today to have a go at transferring it to copper clad but it's the full size of a page! I guess I will have to brush up on my graphic design skills.
cheers,
col2. |
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joshs
Joined: Dec 05, 2014 Posts: 32 Location: Home
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Posted: Fri Dec 05, 2014 12:56 pm Post subject:
Removing Inverse? |
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Howdy! Thanks so much for posting these great designs. I already have your Steiner VCF clone built and now I'm working on a dual ADSR using this design. My question is this... if I'm not interested in an inverse out, is it possible to take that whole section out starting from R18 through U2c and of course the jack itself? Or is that part of the circuit also affecting the ADSR out as well? It's not the biggest deal to keep it really, but seeing as I'm building two, it gives me the option of possibly reducing the part count and saving some panel space. On a similar note, how about removing the LED section, will that affect the circuit. I think it's really cool having the blinking, but I could build a dual version on one TL074 if I got rid of both of those sections... Of course that would require some extra work designing the PCB |
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joshs
Joined: Dec 05, 2014 Posts: 32 Location: Home
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Posted: Fri Dec 05, 2014 12:58 pm Post subject:
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Oh, also, I notice a very minor discrepancy. It seems that the circuit board and schematic differ slightly, although in a way that doesn't affect the circuit. Look at the way the jumper is done for the resistor half of the Slow/Fast jumpers. Not a big deal of course, but I'm putting the circuit together in Eagle and comparing between the schematic and board. Couldn't figure out why I wasn't able to route in quite the same way. |
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littlem4tt
Joined: Jun 30, 2013 Posts: 44 Location: uk
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Posted: Tue Dec 16, 2014 7:31 pm Post subject:
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For some reason my adsr only works correctly when i reverse the diode and the LED polarity, not sure why. Any ideas? |
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joshs
Joined: Dec 05, 2014 Posts: 32 Location: Home
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Posted: Thu Apr 02, 2015 10:43 am Post subject:
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I finally got this circuit breadboarded and the answer is yes, you can get rid of the inverse and the LED and it still works fine. So now the question I'm faced with is... do I actually want to do that? There's something cool about having a bunch of blinking LEDs, but at the same time, removing them saves a lot of wiring and panel space. I also like the idea of trying to build a dual ADSR using one quad opamp. I'm also considering the idea of ditching the switches and instead having one configured in the fast setting and one configured as slow, saving further wiring and panel space. I hate external wiring |
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joshs
Joined: Dec 05, 2014 Posts: 32 Location: Home
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Posted: Tue Apr 21, 2015 10:29 pm Post subject:
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Well, I got it all working, PCB, pots, and all that. Was working great until I wired it backward and let the magic smoke out... Uugh. I already tried replacing the IC's, that's not enough. Anybody out there got a suggestion on the most likely suspects to replace? Or best ways to try and debug? Is it better to start over at this point? What's most likely burned? Transistors? Diodes? Capacitors? I don't have fancy equipment, just a multimeter. I found when I was building the circuit testing transistors and diodes in circuit just doesn't seem to be very reliable... |
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softfin
Joined: Oct 11, 2006 Posts: 271 Location: Far in the north
Audio files: 1
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Posted: Wed Apr 22, 2015 4:16 am Post subject:
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If you have replaced the ICs, then proceed to replace the transistors. They get damaged easily when power is reversed.
If that doesn't help, replace diodes, caps and resistors, but these are usually the last ones to blow up. Caps and resistors usually have external signs when they are damaged. Also, if the diodes haven't blown up they probably work ok. |
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