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2016-04-27 by Ken Stone
the variation rate depends entirely on the frequency of the signal at the CLK (Clock) input. On Thu, Apr 28, 2016 at 5:34 AM, philippe@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: One thing I also noticed though about the CV outputs on the WRS, they are varying in a random
2016-04-27 by phijel
One thing I also noticed though about the CV outputs on the WRS, they are varying in a random fashion, but they are always at audio rate, no matter what signal I send to the CV ins, even slow ones. Is it normal ? Does this have something to do with the unspecified components valu
2016-04-24 by puguglybonehead
That sounds simple enough. Thanks!
2016-04-24 by Jon Nensén
Just add a DC-offset of 1V on the output for each octave you want to go up (or -1V if you want to go lower). Could be solved with a switch, on-off-on, where it goes to -1V if down and +1V if it goes up. That would give you 3 octaves to control. Jon 24 apr 2016 kl. 05:23 skrev pat
2016-04-24 by Ken Stone
No. The CGS10 only provides voltages, not the frequencies themselves. On Sun, Apr 24, 2016 at 1:23 PM, patrezzi@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: Would it be possible to add an extra octave or two of notes to the CGS10 mini keyboard by using a divide-by-2 arrange
2016-04-24 by puguglybonehead
Would it be possible to add an extra octave or two of notes to the CGS10 mini keyboard by using a divide-by-2 arrangement or something similar? I don't need 88 keys, but 2 or 3 octaves would be a useful size. I'm trying to build a portable setup.
2016-04-19 by Ken Stone
Yes, it is an inverted com input. May be of no use at all. On Wed, Apr 20, 2016 at 9:18 AM, philippe@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: just wondering what the IC IN stand for - Inverted Com In ? If yes, I'm wondering what practical use can be done of it... -- Ken
2016-04-19 by phijel
just wondering what the IC IN stand for - Inverted Com In ? If yes, I'm wondering what practical use can be done of it...
2016-04-19 by Ken Stone
Cool :) On Wed, Apr 20, 2016 at 8:47 AM, philippe@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: I'm happy to report back I finished the module(s) and they are working 100% ;-) I love it, it's a fantastic combo, and I'm sure it will get a lot of use in my setup Thanks ! -- Ke
2016-04-19 by phijel
I'm happy to report back I finished the module(s) and they are working 100% ;-) I love it, it's a fantastic combo, and I'm sure it will get a lot of use in my setup Thanks !
2016-04-19 by Ken Stone
Make sure your meter is accurate first. On Tue, Apr 19, 2016 at 5:53 PM, philippe@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: Yes under load (+/- 20 modules) It's a Cynthia majors PSU, it's been a while since I opened it, and I remember there's a kind of protective hood on
2016-04-19 by phijel
Yes under load (+/- 20 modules) It's a Cynthia majors PSU, it's been a while since I opened it, and I remember there's a kind of protective hood on top that needs very specific screwdriver to be removed - not sure the trimmers (if any) can be easily accessed - I'll check again
2016-04-18 by Ken Stone
Are those PSU voltages with the PSU under load or not? It really is a little too high for CMOS. Adjust the PSU if you can. The 0.74 drop is fine. The pots are wired between +VE and 0V, with the wipers going to the resistors, so yes, they are for sending fixed voltages in parallel
2016-04-18 by phijel
I see, thanks Ken I found the diode just after the +15V was dead, so that's why I had a continuity and the same voltage on the C pad btw, my PSU delivers +15,48V on the positive rail and -15,54V on the negative. As the +14,4V only relies on the diode resistance apparently, I have
2016-04-17 by Ken Stone
Pad C in the CGS55 is connected to 14.4 volts. It acts as a HIGH for the CGS51, when the parts in the outlined area containing the TL074 are omitted. "A switch could be placed between the C pads, allowing the switch matrix to be isolated from the weighted random board when the sw
2016-04-17 by phijel
Hello Currently building these (linked together) this is the panel (modcan A format) I designed for it : https://farm2.staticflickr.com/1546/26217580190_b2abc30812_b.jpg Any feedback on this layout ? Also, after rereading the docs, I was wondering my idea to have one switch per s
2016-04-13 by Ken Stone
- I noticed when the switch is set to UP, the direction jack is in fact outputting +10V. When looking at the schematic, it looks like it cannot be otherwise because it is directly connected to the +15v from the switch through a 47k and a 15k resistor... Am I missing something her
2016-04-13 by phijel
Thanks. The chip looks fine, but no spare to try unfortunately... I had 2 more questions maybe related to this : - I noticed when the switch is set to UP, the direction jack is in fact outputting +10V. When looking at the schematic, it looks like it cannot be otherwise because it
2016-04-12 by Ken Stone
Should I try to switch the cables going to UD and SW and see what happens ? You could, or add another 47k in series with the switch and see if that helps. Regarding the reset issue in reverse mode, I checked the parts you said, the 547 is placed following the silkscreen, the asso
2016-04-12 by phijel
Thanks for your reply, Ken. direction switch / jack : I'm using a standard Serge gate signals to drive the direction jack, so not really weak (0-5V). The direction jack is wired to UD and the top contact of the switch to SW, following the instructions. The center contact of the s
2016-04-06 by Ken Stone
Reverse switch/jack. Usually, the input jack will over-ride the switch. Yours is working the other way around. The Reverse switch/jack thing will be caused by one of two things: 1) what you are driving it with is a weak signal 2) You have the jack and switch inputs swapped with e
2016-04-06 by phijel
Hello, I've built this and it works fine, excepted (perhaps) for 2 small issues : - the direction jack only works if the direction switch is set to reverse - the reset jack works fine in forward mode, but doesn't work when in reverse direction Is it normal behaviour or do you thi
2016-03-31 by Ken Stone
You may need thicker power wires to it. Your power supply might be overloaded. Adding some 10uF to the power rails on both sides of the DUSG may help. On Thu, Mar 31, 2016 at 9:04 PM, Jorgen van de Burgt jorgen.vandeburgt@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: I'm get
2016-03-31 by Jorgen van de Burgt
I'm getting crosstalk between two parts of the DUSG module when they are both cycling all of a sudden. Anybody else ever have this issue?
2016-03-17 by phijel
Oh, damn...wasn't aware of that. Next on my list then. Thanks !
2016-03-17 by Ken Stone
The solution is the VCS - the CGS75. On Fri, Mar 18, 2016 at 1:10 AM, philippe@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: Just about to wire this in 5U. Just wondering, what would it take to have an independent CV control over rise and fall instead of the switch ? -- Ken
2016-03-17 by phijel
Just about to wire this in 5U. Just wondering, what would it take to have an independent CV control over rise and fall instead of the switch ?
2016-03-14 by phijel
thanks for your reply, Ken. Good to know it's possible (but I'm afraid it goes well beyond my current limited knowledge of electronics, so I'll keep this info for later ;-) )
2016-03-10 by Ken Stone
Doable, yes. The counter has programming inputs, so it is easy enough to select an input with binary. The hard part is you will want to be using 8 individual inputs to select the stages, and that requires one of these http://au.mouser.com/Search/Refine.aspx?Keyword=cd40147 On Thu
2016-03-10 by phijel
So I finished building this, and it works great ! (I first struggled with it but quickly the culprit was a faulty TL074 - the second chip DOA from mouser in this order...grrrr) So thanks Ken for another great design ! And now I start to dream about adding a stage select input fun
2016-03-09 by valdemarkristensen
Thanks, Ken. I went through it all and didn't find anything suspicious. I plugged it back in to the modular, to test with an oscilloscope, but now it works :D strange. Best, Valdemar
2016-03-08 by Ken Stone
Also check the PNP transistors associated with the 470pF capacitor on the preceeding stage. On Wed, Mar 9, 2016 at 6:09 AM, Valdemar Kristensen valdemar.kristensen@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: Hi, Today I finished a 4 step Cgs sequencer/ programmer. It is wo
2016-03-08 by Valdemar Kristensen
Hi, Today I finished a 4 step Cgs sequencer/ programmer. It is working fine except for one thing: with a clock sent to "up" the sequencer gets stuck everytime it reaches step one. If I plug a cable from the pulse out of step one To the pulse in of step two I get a step sequencer
2016-03-08 by Julien Pauty
In the schematic: caps are unpolarized. 1uF can be found in ceramic through hole. Ceramic are unpolarized. Depending on the orientation of the caps and the polarity of your input signal, using a polarized might work. A working configuration is using a positive only input signal w
2016-03-08 by cg_synth
You'd be better taking something like this to muffwiggler.com. It has nothing to do with CGS.
2016-03-08 by loren_ludwig
hi there, [i think my last crack at this question didn't get posted, for some reason...apologies for potential duplication] i'm breadboarding this ring modulator and it's not working, yet. i think i might have screwed up the capacitors. in the schematic, the 1µF capacitors are fi
2016-03-07 by nugzali
Great, Thanks for answering my questions!
2016-03-06 by Ken Stone
Either would do the trick, and they will work with a common plug-pack/wall wart On Mon, Mar 7, 2016 at 2:37 AM, nugzali@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: Or your http://www.elby-designs.com/contents/en-us/p1095_PSU-8_Micro_Power_Supply.html If I went the DIY rout
2016-03-06 by nugzali
Or your http://www.elby-designs.com/contents/en-us/p1095_PSU-8_Micro_Power_Supply.html If I went the DIY route?
2016-03-06 by nugzali
Thanks for the quick response and good advice. I am reluctant to build my own power supply so I have been looking to purchase an assembled power supply for a small euro rack system. Ultimately I plan on having a series of CGS04 mixers and need power for ~1-12. I'll get one workin
2016-03-05 by Laurie
No, You need a dual rail supply (+ve and -ve and 0V) so you need to look at adding something like the CGS14 or CGS66. Overkill for just a CGS04. If you don't mind changing batteries then you c an run it off 2x 9V batteries as it will work down to around +/-6V. Best Regards Laurie
2016-03-05 by nugzali
I'll do my homework and post again soon. Thanks Again! - NA
2016-03-05 by Ken Stone
It needs to have a split output - +, GND and -. That's 3 wires. 99% of adapters have only two wires. If you find an adapter with an AC OUTPUT of 18V, you can use the CGS66 power supply to convert the voltage from the adapter to something usable by the mixer and other CGS designs.
2016-03-05 by nugzali
Thanks, What would you suggest for a stand alone stomp-box style mixer? Something like this? 12V 5A AC Power Adapter / Brick 12V 5A AC Power Adapter / Brick View on store.synthrotek.com Preview by Yahoo
2016-03-05 by Ken Stone
No. On Sun, Mar 6, 2016 at 7:36 AM, nugzali@... [cgs_synth] cgs_synth@yahoogroups.com > wrote: Can anyone tell me if I can use a Boss Style Power Supply (9v 0.5A 4.5W, center neg.) to power the Cat Girl Synth - DC Mixer (CGS04 v2.2)? negative into VE- on board positive into VE+ o
2016-03-05 by nugzali
Can anyone tell me if I can use a Boss Style Power Supply (9v 0.5A 4.5W, center neg.) to power the Cat Girl Synth - DC Mixer (CGS04 v2.2)? negative into VE- on board positive into VE+ on board Thanks, NA
2016-02-26 by Jon Peters
Look up Okefenokee build thread on Muffs in the DIY section Sent from my iPhone
2016-02-26 by Ken Stone
>Range: wtf? -one goes nowhere. so for a SPDT switch: centre lug to ___? outer lug to ____? There are two pads marked Range. If using a SPDT switch, which is most likely, one wire goes to the center lug of the switch. One goes to one of the outside lugs. The other outer terminal
2016-02-26 by trimix83
Why can't there just be a photo or sketch? Please help - I can't decipher the schematics. I'm building Burst Generator, and can't understand how to connect terminal pads for the following: Range: wtf? -one goes nowhere. so for a SPDT switch: centre lug to ___? outer lug to ____?
2016-02-26 by Ken Stone
>DPDT switch - huh? What's the second set of poles for? The first set of poles are already being used by the clock circuit, adding 330n across the 100n. The second set of poles are to add another capacitor (let's say 33n) across the 10n between pins 10 and 9 of IC2. You should al