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2006-02-14 by Richard Brewster
I think the technical term for the 'pad' is a *land*. -Richard Brewster http://www.pugix.com c10h14no2i wrote: >Im talking about where the holes are drilled through the board, and >there is the metal pad where you put the solder. > >
2006-02-14 by c10h14no2i
Im talking about where the holes are drilled through the board, and there is the metal pad where you put the solder. there were three on this board. One was missing. One fell off as soon as I started to solder it. Then the third I just found today. The one today was for the resis
2006-02-14 by sasami@hotkey.net.au
Describe "bad pad". I've not seen any bad pads on any of my boards so far, so I'd like to know what you mean. Ken >Ken, >thanks for your suggestion, the power supply took care of the hum!! > >The low pass still didn't work, but I traced the problem to a bad pad >on the pcb. This
2006-02-14 by c10h14no2i
I finsihed the VCO today, and believe it or not........ it doesn't work either :( :( :( :( (in my defense, so far every problem I have had in the past couple of weeks has turned out to be outside of my control.. ray wilson EG - bad ic, ray wilson sample hold - the schematic was w
2006-02-14 by c10h14no2i
Ken, thanks for your suggestion, the power supply took care of the hum!! The low pass still didn't work, but I traced the problem to a bad pad on the pcb. This PCB had a few bad pads on it, but the others I noticed while I was putting it together. All of the other PCB's Ive gotte
2006-02-13 by sasami@hotkey.net.au
>Here I am w/ another totally beginner question... I see a lot of >people put in level pots for the inputs to the modules they are >building (audio in, CV in FM level, etc). For me, since I will not be >using all of these modules at once, I think I could save space and >pots by b
2006-02-13 by c10h14no2i
Hello, Here I am w/ another totally beginner question... I see a lot of people put in level pots for the inputs to the modules they are building (audio in, CV in FM level, etc). For me, since I will not be using all of these modules at once, I think I could save space and pots by
2006-02-13 by Laurie Biddulph
Yes, 1N914 and 1N4148 can be freely interchanged in 99.99% of cases including this VCO 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 transmitted with it are confidential and intended f
2006-02-12 by sasami@hotkey.net.au
In a word, YES. Ken >Hi, >Im building a VCO from a kit and Im one diode short. The diodes >supplied are 1n4148's. All Ive got are 1n914's. Can I substitute one >of the 914's for the missing 4148? > >Thanks > > > > > > >The CGS Modular Synth home page: http://www.cgs.synth.net/ >
2006-02-12 by Dave Kendall
There was a thread a while ago in the [synth diy] list that discussed 1n4148 vs. 1n914 substitution. The consensus, as I recall, was that there are some minor differences, but they are not significant in most analogue synth circuits, and that they can be used interchangeably.....
2006-02-12 by c10h14no2i
Hi, Im building a VCO from a kit and Im one diode short. The diodes supplied are 1n4148's. All Ive got are 1n914's. Can I substitute one of the 914's for the missing 4148? Thanks
2006-02-10 by c10h14no2i
The cap is correct, but not a standard electro.. its a tantalum I believe. Got the components from Elby. the transistors are not metal can. I dont know the manufacturer of the transistors, but I did look up the datasheets for several manufacturers w/ the same package.. they all s
2006-02-10 by bbluthang
at the risk of being redundant, is the electro on the LP input alligned correctly? also did you use the same transistors specified in the schematic? metal cans or TO92s? its worth double checking you haven't got the pinouts mixed, there is a lot of variation between different mak
2006-02-09 by c10h14no2i
Ok, I replaced the IC and all is good, except for the hum. I get absolutely NO input on the LP input. and the hum is definately being low pass filtered. The other 2 inputs work.. I can hear audio and the hum. Ive checked all of the connections and components from the LP input to
2006-02-08 by c10h14no2i
Thanks! You've all made me feel a little better at least! My first job out of highschool was building computers at a local build to order PC company. If we smoked a chip our boss would come by and say "uh oh.. looks like someone let the gene out of the bottle. Better make a wish"
2006-02-08 by Haven Sole
hahahahaha. i did the same thing while i was t.a.ing last year. a little different though. told them that the smoke meant that you made a good connection and it was designed to do that so that we would know that. classroom smelled like burnt circuts for 2 weeks. me and the techer
2006-02-08 by Edward r Jones
You're not hardcore about electronics until you have a few burns here and there from chips, or at least from a soldering iron. re: smoke Last year our teacher pulled something on all the noobs in our class that always makes me chuckle. He explained how electronics components have
2006-02-08 by Haven Sole
yeah, i had the same exact problem when i built my first one. this is why i put a socket in the ic slot, so if i do burn one out, which has happened more than a few times, i can easily replace it. and yes, the ic did still heat up. one time to point it almost gave me a 1rst degre
2006-02-08 by Ryan Williams
c10h14no2i wrote: > It is possible that while I was messing w/ it on my desk, trying to > find the source of the hum that it touched a piece of metal and > shorted something out. I've done that before, with scraped leads, and meter or scope probes. I also had a board that worked
2006-02-08 by sasami@hotkey.net.au
>If I did do something to fry the IC or a transistor or something, >would the IC still be getting hot now that the problem is corrected? Probably. Once it's smoked, its damaged. Ken >I checked the voltage. I checked that +, -, and ground are all >connected properly. I checked for
2006-02-08 by c10h14no2i
I tested the supply. It is still good. The rest of my synth is plugged into it as well, and it works. It is possible that while I was messing w/ it on my desk, trying to find the source of the hum that it touched a piece of metal and shorted something out. There are several leads
2006-02-08 by sasami@hotkey.net.au
See previous answer. You are probably pusing over 30 volts into it due to a failed regulator. Ken >I dont know what is wrong w/ this now, but smoke just came out of >the tl071!! It's been working fine for an hour while Ive been >testing it.. other than the hum. > > >--- In cgs_sy
2006-02-08 by c10h14no2i
I dont know what is wrong w/ this now, but smoke just came out of the tl071!! It's been working fine for an hour while Ive been testing it.. other than the hum. --- In cgs_synth@yahoogroups.com , sasami@... wrote: > > A poor power supply is the probable cause. > > Ken > > >I just
2006-02-08 by sasami@hotkey.net.au
A poor power supply is the probable cause. Ken >I just finished the synthacon filter and I get a loud hum at the >output. The noise can be filtered and resonance can be applied to >it. Its not really noise, but a low E. > >If I attach an audio source to the BP and HP inputs, I ca
2006-02-08 by c10h14no2i
I just finished the synthacon filter and I get a loud hum at the output. The noise can be filtered and resonance can be applied to it. Its not really noise, but a low E. If I attach an audio source to the BP and HP inputs, I can hear the audio as well. I dont hear audio when I pl
2006-02-02 by sasami@hotkey.net.au
>I'm already using a TL072. >Maybe I should change the LM324 for a TL074 too? Correct. I'd forgotten I'd used a 324 instead of a 358 here. Ken _______________________________________________________________________ Ken Stone sasami@... or sasami@... Modular Synth PCBs for sale ht
2006-02-02 by Tom Adam
Andrew, Should I? I'll give it a go this weekend. > have you tried replacing the transistor? -- Tom Adam The Big Ear http://users.pandora.be/the-big-ear/ Check out the download section!
2006-02-02 by Tom Adam
Ken, I'm already using a TL072. Maybe I should change the LM324 for a TL074 too? > My Guess - If you have used an LM358 anywhere, replace it with a TL072. > > Some 358 are so slow that the counter can jump several steps - and it is > always the same steps too. -- Tom Adam The Big
2006-02-02 by sasami@hotkey.net.au
My Guess - If you have used an LM358 anywhere, replace it with a TL072. Some 358 are so slow that the counter can jump several steps - and it is always the same steps too. Ken >hi >have you tried replacing the transistor? >andrew > > > >--- In cgs_synth@yahoogroups.com , Tom Adam
2006-02-01 by bbluthang
hi have you tried replacing the transistor? andrew --- In cgs_synth@yahoogroups.com , Tom Adam wrote: > > Howdy, > > I've just recently finished my Sequential Switch and have noticed > something strange. > It seems like it's counting OK, but the led of step 6 never comes up and >
2006-02-01 by Tom Adam
Howdy, I've just recently finished my Sequential Switch and have noticed something strange. It seems like it's counting OK, but the led of step 6 never comes up and the output voltage at step 6 is 0. I checked polarity of the led and that's OK. Also when I turn the pots fully cw,
2006-02-01 by Scott Stites
It's a sequencer that's just winding down the design stage and is headed for the build stage. CD4516 counter/CD4028 decoder based. This one was on breadboard (it's got the comparator circuit from the CGS Frequency Divider on the clock input). Take care, Scott -----Original Messag
2006-02-01 by c10h14no2i
What sequencer have you got? --- In cgs_synth@yahoogroups.com , "itsatwistah" wrote: > > I've been using the CGS Wave Multiplier in a fairly unique manner > lately and I thought I'd share it with the group. > > I've been using it for creating different rhythms from a standard LFO
2006-02-01 by scottnoanh@peoplepc.com
> Um. Yeah, it is. I guess. > > http://www.phrases.org.uk/bulletin_board/6/messages/968.html Whoa! I was using the word in the adjective sense (The Mystery Science Theatre Reference - as I understand it, it was a not uncommon descriptor used in the mid to late 1950's for 'nifty'
2006-01-31 by Richard Brewster
Um. Yeah, it is. I guess. http://www.phrases.org.uk/bulletin_board/6/messages/968.html -Richard Brewster Scott Stites wrote: >The Wave Mutliplier is just the ginchiest, ain't it? =-D > >
2006-01-31 by Scott Stites
Thanks! I was working on some samples for a filter, and hooked up the sequencer as described, fiddled with the folds control and that timing popped out. I thought it had a pretty bouncy feel to it, so I left it running and went upstairs to do something else while I thought about
2006-01-31 by dustin sedlacek
i was thinking last night about feeding the wavefolder into its self i dont know how this would work... On 1/31/06, itsatwistah scottnoanh@... > wrote: > > I've been using the CGS Wave Multiplier in a fairly unique manner > lately and I thought I'd share it with the group. > > I'
2006-01-31 by Pete
Cool little tune! On 1/31/06, itsatwistah scottnoanh@... > wrote: > > I've been using the CGS Wave Multiplier in a fairly unique manner > lately and I thought I'd share it with the group. > > I've been using it for creating different rhythms from a standard LFO > output. Cool thi
2006-01-31 by itsatwistah
I've been using the CGS Wave Multiplier in a fairly unique manner lately and I thought I'd share it with the group. I've been using it for creating different rhythms from a standard LFO output. Cool thing is, the LFO can be a sine or triangle wave. I simply plug the LFO into the
2006-01-30 by thomas white
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7386495272&rd=1&sspagename=STRK%3AMESE%3AIT&rd=1 OK, sorry for the multiple posts for those of you who are on multiple lists and will see this more post than once. The tax man cometh and if I want anything new, this has to go. Sa
2006-01-28 by sasami@hotkey.net.au
It depends on how high above you go - in most cases the input impedences are pretty high, and there are voltage dividers being used. In those cases it is not an issue. Occasionally there is no voltage divider, e.g. gated comparator input, in which case doing so would be less desi
2006-01-28 by sasami@hotkey.net.au
>Can it handle this? Yes, without any trouble at all. Ken >Greetings > >Just got the Anaalog shift register up and running, and I was wondering >about what it will tolerate as a clock input. I wanted to use a >particularly beefy square wave LFO (+-15V), but was worried I might to
2006-01-28 by Pete
Good question. I was wondering myself. Do the CGS modules have some kind of input protection if voltages go above 15v? pete On 1/28/06, Gerald Stevens logo64@... > wrote: > > Greetings > > Just got the Anaalog shift register up and running, and I was wondering > about what it wil
2006-01-28 by Gerald Stevens
Greetings Just got the Anaalog shift register up and running, and I was wondering about what it will tolerate as a clock input. I wanted to use a particularly beefy square wave LFO (+-15V), but was worried I might toast one of the IC's. Can it handle this? -gerald [Non-text porti
2006-01-27 by sasami@hotkey.net.au
That would be one way to do it. The other would be to wire the pot as described, then from its wiper, run two 100k resistors, one to pin 13 and one to pin 6 of IC 1 Ken >Hi. > >I want to add a front panel pot in addition to the CV input. Has >anyone tried this? My first idea was
2006-01-27 by mrboningen
hey scott! lfo's, env's and sequencers go without saying, you need lots! i have a LOT of fun with my wiard noise ring. i mainly use it as a cv source into a blacet/wiard miniwave set to scale quantise mode (i have the matthew davidson scale quantiser prom) into vco's. instant ran
2006-01-27 by hitchindave
Hi. I want to add a front panel pot in addition to the CV input. Has anyone tried this? My first idea was to use a CGS04 mixer, with a Pot wired as a voltage divider between GND and +15V as one of the inputs, the existing CV input as another, and the mixer's output directly conne
2006-01-27 by srmaietta
Scott, LFO's and EG's are the core of CV in most synths and are a good place to stock up. I like having both syncable and voltage controllalbe LFO's on hand, and EG's that are VC'able are nice too. A Sample and Hold is a great flexible module that helps bring the audio and CV wor
2006-01-26 by Gerald Stevens
Well... my Steiner filter sat on my work-bench for months. I worked on it so much that the solder contacts on the board to one of the 2n2222's were destroyed after swapping transistors too many times. I had just about given up on it. I swapped the 2907 with a 3906, and swapped th
2006-01-23 by sasami@hotkey.net.au
>Hi, Ive got a bunch of cgs modules on the way, but ordered some PCB's >from the musicfromouterspace website for my VCA. It states in the VCA >info that it only works w/ +/-5v. I have been reading that the cgs >modules sometimes use higher voltages. > >Do you think I am going to