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2007-09-02 by Rafael Cohen
I ordered the book yesterday! Thanks... : ) This has been super helpful and informative, everybody, thanks..... I will put up pics on my blog when the project is done... (absurd as it is) Rafael [Non-text portions of this message have been removed]
2007-09-01 by bbluthang
Hi thanks for posting the designs, its still a bit hard to grok what your're doing but Ken will almost certainly be right - look for construction error(s) - something left unsoldered, wrong way around, etc....sometimes its better when the smoke comes out cos then you know exactly
2007-08-31 by Mark Rauch
Howdy, The debounce process involves a time delay in which multiple on/off signals are ignored. this happens very fast. After the delay, the circuit is left at the present switch position. It is possible to set up a debounce of one second or more with a big enough capacitor and r
2007-08-31 by contact@bridechamber.com
The PN4391 works great. The 2N4391 should, I believe, be reversed. Best check the datasheet. Cheers, Scott ----- Original Message ----- From: sasami@... To: cgs_synth@yahoogroups.com Sent: Friday, August 31, 2007 5:46 PM Subject: Re: [cgs_synth] Bi n tic part subs >This is an exc
2007-08-31 by Richard Brewster
Oops. Typo. That is a CD4010 non-inverting CMOS buffer. Not 4001. -Richard Richard Brewster wrote: > R1 > Switch > ---/\/\/\/\/---- > +V | | > | |\ 4001 | > > |/ > Gnd > > The switch is between +V and ground. The 4001 is a non-inverting > buffer, powered by +V. Let the switch be
2007-08-31 by sasami@hotkey.net.au
>This is an exciting project to me but. I have no BC557 transistors. >Can I sub a BC558 when using a BC547 on the Bi N Tic. Yes. A BC556, BC557, BC558 or BC559 would work here. >How is a 4391 as a JFET ? I am using an ssm2210 next to it. It should be okay. Ken ___________________
2007-08-31 by Joel Kirchartz
I think You should post them here ( or somewhere online) for all of us to see, I'm "between Jobs" right now but I have a nice stockpile of parts & solder. I would love to see some of these modules. babysealclub babysealclub@... > wrote: With all this talk of crazy complex modules
2007-08-31 by gino wong
This is an exciting project to me but. I have no BC557 transistors. Can I sub a BC558 when using a BC547 on the Bi N Tic. How is a 4391 as a JFET ? I am using an ssm2210 next to it. Is there a substitution table on line for synth level parts ? I could ask better questions if i fo
2007-08-31 by stuadh
Hi, I've posted the circuit diagrammes for the sequencer. Please excuse the My First Circuit by Jonny aged 8 look. I've missed out some of the circuit that doesn't affect the main body for clarity. It can be found in Files/Programmer Yours Aye Stuadh --- In cgs_synth@yahoogroups.
2007-08-31 by sasami@hotkey.net.au
Hi, Almost certainly you will find the problem is a bad solder joint or a components in the wrong place or wrong way around, or some other sort of construction error. The parts are pretty robust and will survive most of that sort of construction error. Ken > >Very kind of you to
2007-08-31 by peoplehavetakenallthegoodones
hi i use lots of VCO and VCF plugins when im recording and wanted to emulate it live. i could get a moog low pass etc but theres no fun in that! id prefer to build them... are these kits suitable with the effect pedal adapter? has anyone tried this?
2007-08-31 by stuadh
Hi, Very kind of you to help. I'm using a Doepfer Sequential Switch that I had a spare board from. It runs from the 4 Rows and can really be considered as separate to the Sequencer (even though it is on the same panel). For the 16 steps, I just wired up 16 boards. Why do anything
2007-08-31 by Richard Brewster
R1 Switch ---/\/\/\/\/---- +V | | | |\ 4001 | |/ Gnd The switch is between +V and ground. The 4001 is a non-inverting buffer, powered by +V. Let the switch be centered. On power up OUT may be at ground or +V. Whichever it is, since it feeds back to the input through R1, it will s
2007-08-30 by rafe127
I guess it is about time I picked up the CMOS cookbook, I will order it tomorrow. Explain to me, if you will, the basic premise of this kind of debouncing. Will it still work for my purposes if the open and close of the switch are as much as one second apart? I'm just curious wha
2007-08-30 by bill bigrig
Howdy, A good debouncing and flip/flop setup can be easily found in "The Cmos Cookbook. It seems you are going to have to debounce and eliminate one of the pulses. All of this is covered in the book. It also explains "half monostables", which might suit your purpose nicely. rig -
2007-08-30 by bbluthang
Hi I am willing to help but am unsure of your project Are you combining a Sequential Switch with a Seq/Programmer? > > I've checked that I'm putting +15V, 0V and -15V (actually +14.8V > and -15.2V...is this significant? shouldn't matter On reflection, this is probable cause by th
2007-08-30 by stuadh
Hi, I've done a bit of testing and looking around the sequencer and I found a number of faults (in design and build) that I have rectified. I've checked that I'm putting +15V, 0V and -15V (actually +14.8V and -15.2V...is this significant? That fault lies with my power supply) I'v
2007-08-30 by Richard Brewster
See Electronotes #73, p. 11, for a reliable switch debounce circuit that uses 1/6 of a 4010 CMOS chip. A 1K resistor goes from the input to output, creating a positive feedback loop. (Should work with a 10K or larger resistor, too.) Hook the center of a toggle switch to the input
2007-08-30 by sasami@hotkey.net.au
What you are experiencing is called switch bounce. Try wiring a 10n (0.01) from the input to ground. Ken >I have to admit I am a bit confused about this issue right now. >After BigRig's advice I tried this out with a few different switches >and the circuit outputs a trigger upon
2007-08-30 by sasami@hotkey.net.au
No, I think that's everybody :) >Hi > >Well, actually one of your prizes would take > >the award for the dumbest modules(design wise) >That is any EFM modules/partial kits >Or is it just me? >Jeri Danger > > >-----Original Message----- >From: babysealclub babysealclub@... > >To:
2007-08-30 by rafe127
That's an interesting idea and I will definitely check it out, although what I am using is not a regular piezo, but instead a piezo switch. It has different properties and some built in circuitry already. --- In cgs_synth@yahoogroups.com , Pete wrote: > > You should get yourself,
2007-08-30 by laxt57@aol.com
Hi Well, actually one of your prizes would take the award for the dumbest modules(design wise) That is any EFM modules/partial kits Or is it just me? Jeri Danger -----Original Message----- From: babysealclub babysealclub@... > To: cgs_synth@yahoogroups.com Sent: Wed, 29 Aug 2007
2007-08-30 by Pete
You should get yourself, "The Electronic Drum Cookbook" by Thomas Henry. Inside you will find a circuit for building a drum pad using a piezo. Im sure this will help you to build what you need. pete -- http://www.myspace.com/23isgood [Non-text portions of this message have been r
2007-08-30 by rafe127
I have to admit I am a bit confused about this issue right now. After BigRig's advice I tried this out with a few different switches and the circuit outputs a trigger upon closing AND opening of the switch, whenther its a toggle switch or a momentar button OR a piezo switch. Any
2007-08-29 by rafe127
Crumbs.... Is there no way to get a good clean timely click out of a piezo switch? Will it always only deliver upon "release"? If I tap it quickly, then it comes close to the behavior I want, although it sometime "double clicks" --- In cgs_synth@yahoogroups.com , "Mark Rauch" wro
2007-08-29 by Dave Kendall
OK I'm In. :-) I've had a really stupid idea for a module. I'm going to go and drink lots of beer, in the hope that it gets even more dumb. If I can get the parts, I might even build it. S-diyers of the world unite! You have nothing to lose but your credibility! Cheers (hic!) Dav
2007-08-29 by Sam Albaniensson
On 29/08/2007, babysealclub babysealclub@... > wrote: > With all this talk of crazy complex modules (design wise) I thought > it would be interesting to see what dumb modules you could all think > of. So I though I'd start a contest. > > Grand Prize: untest Phaser board from a de
2007-08-29 by babysealclub
With all this talk of crazy complex modules (design wise) I thought it would be interesting to see what dumb modules you could all think of. So I though I'd start a contest. Grand Prize: untest Phaser board from a dead Polysix. First Place: Assortment of EFM PCBs/partial kits. Se
2007-08-28 by Mark Rauch
Howdy, Yes, a peizu relies onpressure to genreta voltage. When you pushthe switch you cock thr pistol". When you release, the kintic energy of dtriking the crystal emits a voge. RRig --- In cgs_synth@yahoogroups.com , "rafe127" wrote: > > > Hi everybody... > > I build half of the
2007-08-28 by rafe127
Hi everybody... I build half of the gate to trigger converter just now in an attempt to make a nice clean click sound. I am using one of these switches: http://www.piezoswitch.com/about_switches.html ...and the switch is a momentary Normally Open SPST switch that passes +9V from
2007-08-27 by Ben Stuyts
Hi, On 27 Aug 2007, at 02:25, stuadh wrote: > 2. Because I made a number of changes to Ken's module, can anyone > recommend any (free) software for Mac OSX that can be used to draw > circuits? That way someone might be able to tell me if it is an > inherent design flaw. Maybe Des
2007-08-27 by celebutantemusic
Thanks, will do. Mitchell --- In cgs_synth@yahoogroups.com , sasami@... wrote: > > You need to add a pot in the feedback loop. Reduce the 100k to 82k and put > in a 50k trim pot. This will allow you to adjust the gain for exactly unity. > Chances are your 100k resistors don't qui
2007-08-26 by stuadh
Hi, After a LOT of work, I've just plugged in my Programmer/Sequencer and it doesn't work. At least there was no smoke or burning smells. But it realy isn't looking healthy. Although it is too late at the moment to describe the symptoms in detail, it doesn't advance along the sta
2007-08-26 by John Mahoney
Dude, where's my post? I posted an answer an hour ago. Friggin' Yahoo... -- john -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.484 / Virus Database: 269.12.8/973 - Release Date: 8/25/2007 5:00 PM
2007-08-26 by sasami@hotkey.net.au
You need to add a pot in the feedback loop. Reduce the 100k to 82k and put in a 50k trim pot. This will allow you to adjust the gain for exactly unity. Chances are your 100k resistors don't quite match. Ken >I just built an LM337 based -2V DC circuit in order to add offset to my
2007-08-26 by celebutantemusic
I just built an LM337 based -2V DC circuit in order to add offset to my .com's oscillators (because they don't go low enough unless you switch them into "LO" mode which is really hard to tune properly). It works perfectly when I use two of the CV ins on the oscillators to mix the
2007-08-26 by sasami@hotkey.net.au
Directly? No. You would need to add an op-amp inverter per oscillator to do it. Ken >Can I tap the individual outs of each oscillator in the super psycho, >prior to the mixer bus? I am finding space on my panel for the extra >jacks and would love it 10x if this would work. > > >
2007-08-26 by matthewregula
Can I tap the individual outs of each oscillator in the super psycho, prior to the mixer bus? I am finding space on my panel for the extra jacks and would love it 10x if this would work.
2007-08-25 by Pete
I have had my dual drum module for a while now. I had not been using it but now I'm building a drum box so I pulled it out and plugged it in to test it. It was behaving very erratically when I noticed that the wires to the pots where not attached very well. I pulled the pots off
2007-08-24 by stuadh
Many thanks. I reckon I'm just another night or two away from plugging the thing in. That is when I learn if I've just wasted 3 months ;-) Yours Aye Stuadh --- In cgs_synth@yahoogroups.com , sasami@... wrote: > > > >1. What is the maximum voltage that the UP and DOWN inputs can a
2007-08-24 by sasami@hotkey.net.au
>1. What is the maximum voltage that the UP and DOWN inputs can accept? +/-15V >2. If I apply a voltage to the Ext Pulse input, does that board >become active, or does it move to the next in sequence? That stage becomes active. >3. What is the max output voltage from the Rows 1-4
2007-08-24 by stuadh
Hi All, I'm nearing the end of my Sequencer project based on Ken's CGS 59 Module. The CGS 59 is the heart of the module with my additions mainly just altering the front end controls. 1. What is the maximum voltage that the UP and DOWN inputs can accept? 2. If I apply a voltage to
2007-08-20 by sasami@hotkey.net.au
>I guess if the added power line filtering doesn't work, I can move the >modules around. Swap a module from my main cabinet w/ the gated comp. >(tho I hate to do it, because it works out perfectly having all the >percussion controls in that 2nd external cabinet) Also, try heavier
2007-08-20 by synthwick
Hello, The problem with moving the power, is that I finished my main synth cabinet, and this is all in a 2nd cabinet. It's only the divider, percussion, and gated comp in a little rack mount case. It has a power cable that goes into my main cabinet where the supply is located. I'
2007-08-18 by sasami@hotkey.net.au
Possible solutions. -Run the power wires from each module to a common point near the PSU. -Increase the input decoupling capacitors on the boards to 47uF. -Place 10 ohm resistors in series with the +/- power rails to the two modules. -Use two power supplies. Chances are that the
2007-08-17 by synthwick
Hello, I've been playing around with the gated comp and percussion modules I built, and noticed that I hear whatever I put into the gated comp input at the cynare filters output. It's especially noticeable w/ a noise source. I'm sure it isn't picking up its own noise generator. I
2007-08-15 by Pete
Got it. Thanks Ken. On 8/15/07, sasami@... sasami@... > wrote: > > > First thing, I would like to increase the decay time when I turn up > the > >decay pot to get a longer cymbal sound. Do I change a cap or something? > > Either increae the value of the 2u2 electro, or increase t
2007-08-15 by sasami@hotkey.net.au
> First thing, I would like to increase the decay time when I turn up the >decay pot to get a longer cymbal sound. Do I change a cap or something? Either increae the value of the 2u2 electro, or increase the value of the decay pot to 500k >second question is about the sustain inp
2007-08-15 by Pete
First thing, I would like to increase the decay time when I turn up the decay pot to get a longer cymbal sound. Do I change a cap or something? My second question is about the sustain input. When I patch the square wave output of my Utility LFO into the sustain input while I am t
2007-08-15 by sasami@hotkey.net.au
>Would 50k pots work? Yes. Maybe with a different resistor? No need to change the resistors. Probably around 180k. If you have too much range still, go up to somthing higher. Not enough, drop down to something like 100k. > And just to make sure I'm understanding correctly: > (fro