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2006-01-01 by peng3002
--- In cgs_synth@yahoogroups.com , "rdrake" wrote: > > Not sure when this became available, or if it was announced here, but I just noticed it: > > http://www.cgs.synth.net/modules/cgs62_sd.html > I just built this today and I've only experimented with it a little bit. Some obser
2005-12-31 by Gerald Stevens
Seems like this module gets me half-way towards the goal of chain-able ADSR modules. I was thinking about putting together an ADSR that would trigger at a set-point on a falling edge. It would also have gain, and offset controls, and would have an input / output that would add th
2005-12-31 by sasami@hotkey.net.au
It will detect these changes without any problems. And it would only output a short pulse. That is because it is detecting a very steep and quick slope (i.e. a vertical edge). >Ah! Nice little module. The inverse of the "steady" output means the >signal is moving. I like it. I wa
2005-12-31 by Edward r Jones
That is going straight to the poolroom! What a brilliant idea! Useful for synthing, but, for general purpose electronics fault finding, too. Use a ribbon controller (or analog joystick), and have up and down trigger different drum sounds! I've got the Big Kevs over stuff this cir
2005-12-31 by sasami@hotkey.net.au
You should be able to use a TL074. I've marked it on the circuit diagram as an alternative. No mods needed. Do NOT change the power to it as it drive the CMOS. Ken Ken > Ahhh. I see. I don't know how I missed it. Thanks Ken. One more >question. The LM324 is powered from 14.4V and
2005-12-31 by Richard Brewster
Ah! Nice little module. The inverse of the "steady" output means the signal is moving. I like it. I want something like this to detect when a new voltage appears on a sample and hold, or when my Blacet Miniwave puts out a new value in quantizer mode. Or when the CGS Infinite Melo
2005-12-31 by rdrake
Not sure when this became available, or if it was announced here, but I just noticed it: http://www.cgs.synth.net/modules/cgs62_sd.html "The slope detector is an event-driven gate/trigger generating device. It monitors a control voltage, and responds according to what that voltag
2005-12-31 by peng3002
Ahhh. I see. I don't know how I missed it. Thanks Ken. One more question. The LM324 is powered from 14.4V and -0.6V. If I use a TL074 instead, should I be aware of any special considerations? Can I power the TL074 with + and - 15 Volts? Thanks, peng --- In cgs_synth@yahoogroups.c
2005-12-31 by josh
Ok, i have a good pure sawtooth at the output of CA3140 but after it goes though the next TL072 the sound gets mangled and acts like a lowpass filter. I changed the 68pF cap to 18p and i get a better range over the octaves, but i have opted just to remove it. I also had to lower
2005-12-31 by sasami@hotkey.net.au
>I'm getting ready to put the Sequential Switch together (on the >breadboard first). I noticed that there are diodes at the power supply >and ground inputs. Can someone shed some light as to what their >function is? Are they essential to the circuit? I'm very curious. They are es
2005-12-31 by peng3002
I'm getting ready to put the Sequential Switch together (on the breadboard first). I noticed that there are diodes at the power supply and ground inputs. Can someone shed some light as to what their function is? Are they essential to the circuit? I'm very curious. peng http://hom
2005-12-31 by Richard Brewster
Double check all the capacitor values again. A 68pf cap is in the feedback loop of the sawtooth buffer op amp. If this is a large value by mistake it would act as a low pass filter, cutting off higher frequencies. I used 18pf there. It is only to prevent parasitic oscillations. R
2005-12-31 by sasami@hotkey.net.au
The wave should remain at a constant height for all incoming voltages. This suggests that there is something wrong with the current source (the dual transistor and the parts around it). The current source appears to be accting as a voltage source at the moment. Ken >Thanks for th
2005-12-30 by josh
Thanks for the reply, I'm double checking everything but nothing seems abnormal. When i apply CV it changes octave correctly and can be tuned but the lower notes have so much gain that the upper haves of the signal are clipped and the output is about 6V pk-pk. when i play the hig
2005-12-30 by sasami@hotkey.net.au
I suggest you look elsewhere for the fault - more likely a wrongly placed component. Using 2% resistors will at most cause a slight difference in stability. It certainly won't be the difference between it working or not. Ken >Hey. I just built the ken stone vco and i am trying to
2005-12-30 by josh
Hey. I just built the ken stone vco and i am trying to test it. I seem to be having a problem. The oscillator with no CV applied looks clipped. When i add higher CV voltages the amplitude decreases and it is no longer clipped. It also does not give a clean saw output. It looks mo
2005-12-15 by bbluthang
hi it looks fine don't forget the LEDs, if you don't have them on the panel you will have to put them on the PCB good LEDs to have on the panel, if you like random flickering (i do) cheers andrew --- In cgs_synth@yahoogroups.com , kvltleader wrote: > > Hello > > I uploaded a jpg
2005-12-14 by kvltleader
Hello I uploaded a jpg to the list (Dnoise-Wiring-Check.jpg), can I bother someone to take a look at it and tell me if it's correct. Thanks Chris [Non-text portions of this message have been removed]
2005-12-11 by ken johnston
I won't hold it against you if you (or anybody else here) is wrong. This helps tremendously towards my understanding of these circuits. The voltage at the freq wiper goes from 0 to +15. Otherwise the BCE readings are the same as previously. Sigh. ryan williams wrote: > Hi, > > pl
2005-12-11 by John Loffink
Does anyone know of a source for Matrix Mixer pots in the US? These appear to be Bourns PTV111-34 or Alps RK11K114 11mm pots, but I cannot seem to find a US distributor of low quantities. Also, recommendations for knobs in a semi MOTM style would be appreciated. With the one inch
2005-12-11 by ken johnston
Plastic. I tried reversing them earlier - I'll give it another shot, more scientifically this time around. They are currently in following the generic pinout for these types. Rats, no hope in surges. I haven't yet had a chance to check out Ryan William's second suggestions. I pla
2005-12-10 by sasami@hotkey.net.au
Are you using metal can or plastic transistors? If plastic, they may be in backwards. As for the surge when you power down. It means absolutely nothing - the whole circuit is "unstable" at the point and anything could be happening. Ken ____________________________________________
2005-12-10 by ryan williams
Hi, please, note that I could be wrong about any of this, but if I had this problem, this is what I would be doing. I know troubleshooting is frustrating. Reccently, I spent a week searching a filter circuit for a very simple problem. I think we should look at this area a bit mor
2005-12-10 by ken johnston
Near as I can tell those all check out fine. These are the readings I got on the meter w/common connected to ground: Left transistor collector: 7.04 to 7.32 (freq pot low to high) Left transistor emitter: -.64 Left transistor base: -22.6 to -.33 Right transistor collector: 5.60 t
2005-12-10 by Charles Osthelder
Finally! A fair price! Thanks for the tip Larry. I'd been calling various suppliers and buying their entire stock. Usually, this meant a meager 4-5 IC's because nobody wants inventory of obsolete goods. My biggest find was from a company in California that was going to throw all
2005-12-09 by Larry T.
Chub and all I just ordered 10 4006 from HSC Electronic Supply, for $0.49 each. Here is the link: https://www.halted.com/commerce/catalog/product.jsp?product_id=12317&czuid=1134173901765 or just go to: https://www.halted.com/ and put 4006 into the seach box in the upper right of
2005-12-09 by Charles Osthelder
You found a 4006 IC? I'm still trying to collect these for people. Let me know if you need one - free! Chub - digital noisehead --- In cgs_synth@yahoogroups.com , kvltleader wrote: > > thanks for the help guys. > > > ----- Original Message ----- > From: ryan williams > To: cgs_sy
2005-12-09 by kvltleader
thanks for the help guys. ----- Original Message ----- From: ryan williams To: cgs_synth@yahoogroups.com Sent: Thursday, December 08, 2005 9:14 PM Subject: Re: [cgs_synth] Beginner: Part for Digital Noise and Saw Pitch Shifter woah, mouser quit stocking the 4046. that sucks. They
2005-12-09 by sasami@hotkey.net.au
>I'm not totally sure on the trimmers. well, I'm just not sure what >footprint is used in Ken's PCBs. It seems that it can handle some >different sizes. So, I'm fairly certain this one will work: 652-3306F-1-204 >note, you can probably use a a 250K trim pot which may be more comm
2005-12-09 by ryan williams
woah, mouser quit stocking the 4046. that sucks. They have an NTE part there, I would expect it to work fine, but I haven't tried it. In case you don't know, NTE makes replacement parts. I usually stay away from them, partly because of the price, but I have used some NTE parts in
2005-12-09 by Chris McDonald
Putting together a mouser order and using Bob Knarley's page as a guide for parts (I read the instructions, that's it, when a part is discontinued I am stumped). Can anyone give me mouser numbers for the 200k Trims for the Saw Pitch Shifter and the 4046 Semi for the Digital Noise
2005-12-08 by ken johnston
I will give it a try and let you know. Thanks. ryan williams wrote: > the two non-output 2n2222s would be the differential pair. Those two > transistors set the cutoff frequency. what happens if you connect a volt > meter across the colloectors of these two transistors, then adju
2005-12-08 by sasami@hotkey.net.au
It is there for convenience. It is merely a multiple jack. The cluster creates a spread of voltages around this voltage, so the F jack is meant to be used as the output for the center voltage of the spread. Ken >Hello > >I am new to building Ken's circuits and I have a question a
2005-12-08 by kvltleader
Hello I am new to building Ken's circuits and I have a question about the CV Cluster, what is the purpose of the F jack.. When I use the F jack as an output, it makes just whatever is in the Base CV in go to the output.. When I use the F jack as an input it seems to react the sam
2005-12-08 by ryan williams
the two non-output 2n2222s would be the differential pair. Those two transistors set the cutoff frequency. what happens if you connect a volt meter across the colloectors of these two transistors, then adjust the frequency pot. The voltage difference between the collectors (also
2005-12-08 by betweenpie
I have built the kit but is not yet functioning 100% - more like 10%. An audio signal does come through each input, with a very low output, with the LP being the lowest (barely audible), BP the loudest. Freq pot has no effect. Res appears to be functioning. TL071 is doing it's jo
2005-12-04 by Mike Marsh
I used those exact caps, and they seemed a little droopy. THe 47 actually seem a little sharper, but I didn't scope it before I took the 100's off. Maybe I'm just being superstitious... :) --- In cgs_synth@yahoogroups.com , Richard Brewster wrote: > > What's wrong with the 100nF
2005-12-03 by Richard Brewster
What's wrong with the 100nF for Cx? I used Wima mixed film caps for those, Mouser 505-MKP20.1/250/5. Works fine for me. -Richard Brewster Mike Marsh wrote: >Rplaced the counter and voila! Arabesque! Fueled by the Quantized OUT >of a Blacet Improbability Drive, it's very nice inde
2005-12-02 by Mike Marsh
Rplaced the counter and voila! Arabesque! Fueled by the Quantized OUT of a Blacet Improbability Drive, it's very nice indeed. Now I have to replace the 100nF caps with the 47nF caps... Mike --- In cgs_synth@yahoogroups.com , "Mike Marsh" wrote: > > Good advice on both counts. Wha
2005-11-27 by Mike Marsh
Good advice on both counts. What happened was that I soldered the SOCKET in backwards then put the chip in the right way into the socket which of course was BACKWARDS so the chip was backwards and I fried it. Crap. Sigh. Crikey, what a dumb-ass... Mike --- In cgs_synth@yahoogroup
2005-11-25 by Richard Brewster
It happens. This is why I order extra spare chips, especially the digital ones, and use IC sockets. -Richard Brewster Mike Marsh wrote: >Thank, Ken. I should have the spare by tomorrow or latest Monday. >I've mounted it in a 1U Blacet format Frac panel, with a simple Wave >Folder
2005-11-25 by Mike Marsh
Thank, Ken. I should have the spare by tomorrow or latest Monday. I've mounted it in a 1U Blacet format Frac panel, with a simple Wave Folder on the same panel. I think it will work nicely! Mike --- In cgs_synth@yahoogroups.com , sasami@h... wrote: > > More than likely fried, yes
2005-11-25 by sasami@hotkey.net.au
More than likely fried, yes. Nothing else would be affected though. I was lucky msyelf - I reversed a 723 myself a couple of days ago. It's one of those odd chips that will survive such a reversal! Ken >Hi All - > >Building the ASR, I put the 4024 binary counter in backwards and
2005-11-25 by Mike Marsh
Hi All - Building the ASR, I put the 4024 binary counter in backwards and powered up. Nothing to speak of out of the outs, at least nothing that changed with the clock, just some very high freq stuff. So I put the 4024 back in properly oriented, and got the same result. I'm think
2005-11-16 by Laurie Biddulph
I can also include the 2200pF polystyrene to the kits if desired. The ferrite would offer improved high-frequency suppression but the resistor will work perfect for most of us. Best Regards (Mr) Laurie Biddulph Mobile: 0404 846 943 Elby Designs ABN: 70 022 727 605 http://www.elby
2005-11-16 by sasami@hotkey.net.au
>and also: should I connect the short leg of the LED to LA in the Saw >Pitch Shifter/Wave Multiplier?..and where should I connect the other >longer leg of the LED? Short leg is usually the cathode, so that would go to LK (Kathode) while the long one goes to LA (Anode) Ken _______
2005-11-15 by Richard Brewster
Elby Designs sells the Tempco and also a Bi-N-Tic filter special parts kit: http://www.elby-designs.com/ The 2n2 cap is Mouser 23PS222 http://www.mouser.com/ You would not notice much difference with a 10R resistor. The bead helps filter out RF. If your neighbor is a ham or a CB
2005-11-15 by ryan williams
boward_k wrote: > ..Bi-n-tic soon finished! > just cant find: 2n2 styrene, 1k PT146 tempco...Where can I buy them? not sure where you are, but mouser in the US has 2n2 polystyrenes: part number: 23PW222 (these are radial type) or 23PS222 (axial type) i used the axial type in the
2005-11-15 by boward_k
..Bi-n-tic soon finished! just cant find: 2n2 styrene, 1k PT146 tempco...Where can I buy them? and also: should I connect the short leg of the LED to LA in the Saw Pitch Shifter/Wave Multiplier?..and where should I connect the other longer leg of the LED? and what would be the di
2005-11-15 by Laurie Biddulph
Hello Ken, Yes payment has benne received (thank you) and your order will be shipping tomorrow so should be with you sometime next week. Best Regards (Mr) Laurie Biddulph Mobile: 0404 846 943 Elby Designs ABN: 70 022 727 605 http://www.elby-designs.com This e-mail and any files t