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2012-10-05 by hiko_goldenballs
Hi Brian, thanks for the information. I'm just following what the schematics require and don't know whether the voltage difference make any trouble or not. Though I guess some modules would work well with 15V. I just feel that live and learn. Thanks. --- In cgs_synth@yahoogroups.
2012-10-04 by nn3nn3
Hi Gang, Some of the parts (555, TL082, LM13700) will operate on up to +/-18V so you may not have to use additional regulators to go from 15V to 12V. Check the datasheets to confirm allowable operation range. However, sometimes there may be other elements in the design that were
2012-10-03 by fuyuhiko
Thanks Dave and Ken for those informations. I've almost got idea of how to make it. Cheers --- In cgs_synth@yahoogroups.com , Dave Kendall wrote: > > Yes - 7912 for (-) negative voltages. The 7912 needs a minimum load to > function correctly. An LED with series resistor should do
2012-10-03 by Dave Kendall
Yes - 7912 for (-) negative voltages. The 7912 needs a minimum load to function correctly. An LED with series resistor should do the trick. Might as well add one to the (+) regulator (7812) too - you then have a pair of status LEDs almost for free :-) cheers, Dave On 3 Oct 2012,
2012-10-03 by sasami@hotkey.net.au
>I'm thinking to buy a power supply which produces +/-15V capable of 0.8A per rail, literally Power One HAA15-0.8-AG, then add 7812 and 7912 accordingly. Should I use the 7912 for the negative supply Shouldn't I? Yes. 7912 is the negative regulator. See http://www.cgs.synth.net/m
2012-10-03 by fuyuhiko
Thanks for all kind advices. I'm thinking to buy a power supply which produces +/-15V capable of 0.8A per rail, literally Power One HAA15-0.8-AG, then add 7812 and 7912 accordingly. Should I use the 7912 for the negative supply Shouldn't I? I can't calculate how much current the
2012-10-03 by goldencardigan
Thanks for your kind comments. Will do. Cheers Dean --- In cgs_synth@yahoogroups.com , "roglok" wrote: > > Dean, > > This is one of the most inspiring modular synth videos I've seen in a while. Subscribed to your channel - keep those clips going plz. > > Cheers, > Roglok > > ---
2012-10-03 by roglok
Dean, This is one of the most inspiring modular synth videos I've seen in a while. Subscribed to your channel - keep those clips going plz. Cheers, Roglok --- In cgs_synth@yahoogroups.com , "goldencardigan" wrote: > > Sorry for the self promotion, but I thought a few of you may b
2012-10-02 by goldencardigan
Sorry for the self promotion, but I thought a few of you may be interested in this one. http://www.youtube.com/watch?v=J4s73qFc36c Just a quick video of my rig using the VCS as a subharmonic generator. Please excuse the self-indulgent knob twiddling. Cheers Dean
2012-10-02 by Richarius Molindarius
Also - if possible, find out just how much current will be drawn from the +V and -V sides of the power supply. THEN get 12 volt regulators that are rated for a fair bit higher than that amount. I don't know the general rule for heatsinks on voltage regulators but I do believe it
2012-10-02 by goldencardigan
If you are handy with a bit of veroboard, or able to design and etch a pcb (preferable), it wouldn't be too hard to make a little board with 7812 & 7912 regulators (i'm assuming this is what you meant by 'registers') and the required capacitors. There are plenty of example circui
2012-10-02 by sasami@hotkey.net.au
Yes, there is a problem doing that. Resistors control current, not voltage. You could add a 7812 and a 7912 regulator from the output of the +/-15 to give you +/-12V Ken >Hi there. I've just wondered if there is any problem that making a +/-12V from a +/-15V power supply by simpl
2012-10-02 by fuyuhiko
Hi there. I've just wondered if there is any problem that making a +/-12V from a +/-15V power supply by simply inserting some registers, I want to use both voltages so that I can mix some modules which I've taken from several designers. Kind Regards --- In cgs_synth@yahoogroups.c
2012-09-24 by thomas white
5U FPE Panel CGS Module for sale - $270 + $10 for Priority Shipping in US ($20 worth of shipping) Includes 3 circuits from Ken Stone's Catgirl Synth PCBs: 1 x Psycho LFO 1 x Digital Noise 1 x ASR (Analog Shift Register) Really clean build and panel design. Drops right into a MOTM
2012-09-24 by sasami@hotkey.net.au
The 68k is physically between the 11M and the 330R. >I just noticed as well in the schematic ... quote: >"This schematic is correct for CGS77 VER1.2. Some labels differ for >VER1.1 but the circuit is otherwise identical." > >That, could be the problem. :o The leg of the feedback
2012-09-23 by Richarius Molindarius
I just noticed as well in the schematic ... quote: "This schematic is correct for CGS77 VER1.2. Some labels differ for VER1.1 but the circuit is otherwise identical." That, could be the problem. :o The leg of the feedback 68k comes into contact with pin 6 of the chip as well as t
2012-09-23 by Richarius Molindarius
In the schematic there is a 68k resistor between pins 2 and 6 of the 748, which would be the exact same pinout as the TL071. (Where I changed mine at.) It be there. :) I had V1.... damn. I'll have to look at it and see if I had 1.0. :o With this, I also fed each of the 3 outputs
2012-09-23 by ch1nard
Hey all.. I'm building my CGS77 serge filter for my best of CGS BOG panel and i have a question in regards to one of the modifications listed on the project page: "If you wish the filter to self oscillate at high Q settings, the 68k resistor between pins 2 and 6 of the single op-
2012-09-23 by Stephen Richards
That was it. Stupid mistake ! What a great ADSR !! Can't wait to get further into it. ________________________________ From: Stephen Richards okayjustalittle@... > To: " cgs_synth@yahoogroups.com " cgs_synth@yahoogroups.com > Sent: Sunday, September 23, 2012 10:57 AM Subject: Re:
2012-09-22 by Stephen Richards
HI Again Ken I have just noticed that the 51.1K Resistor in the Output section is actually a 51.1 ohm (green, brown , brown , gold , brown). Do you think this might be the problem here ? I'm going to change it out and make myself a 51.1K ________________________________ From: Ste
2012-09-22 by Stephen Richards
Hi Ken Have replaced the BC547 in same orientation as per PCB stencil. I see now that this is the same as a reversed transistor as the BC547 pinout is opposite to the 2N3565. Still no function. Constant LED has stopped , don't know if thats good or bad in this case. Have checked
2012-09-22 by Stephen Richards
If you mean the LED being constantly on , i'm assuming that's normal. I have a feeling the problem is with the orientation of the BC547. I let you all know when i sort it. ________________________________ From: Horse Legs babysealclub@... > To: cgs_synth@yahoogroups.com Sent: Sat
2012-09-22 by Horse Legs
Maybe it's working correctly? From the CGS page: "Note that this design is a little unusual in that the Gate input will sit at "ON" when nothing is connected to its jack. " -TF --- In cgs_synth@yahoogroups.com , Stephen Richards wrote: > > Hi Ken > > I have everything working on
2012-09-22 by sasami@hotkey.net.au
>Could i have cooked them getting them out maybe ? probably not. Just use a multimeter to check them if you are worried. >Would it be worth replacing them ? Maybe. It would eliminate the posibility. The down side is constant removal of parts from the board will start lifting trac
2012-09-22 by Stephen Richards
Could i have cooked them getting them out maybe ? Would it be worth replacing them ? Stephen ________________________________ From: " sasami@... " sasami@... > To: cgs_synth@yahoogroups.com Sent: Saturday, September 22, 2012 6:30 PM Subject: Re: [cgs_synth] CGS 116 ADSR question
2012-09-22 by sasami@hotkey.net.au
>Hi Ken > >I have everything working on the MARSH panel except the ADSR's. > >I have installed the transistor marked in red on the build page backwards. I used a BC547 there though not a 2N3565. If you used a BC547, it needs to be installed the right way around for the transistor
2012-09-22 by Stephen Richards
Hi Ken I have everything working on the MARSH panel except the ADSR's. I have installed the transistor marked in red on the build page backwards. I used a BC547 there though not a 2N3565. Everywhere else that required a 2N3565 , i used a 2N3904 in it's correct orientation. Everyw
2012-09-21 by fuyuhiko
Thanks Dave for the information. I will plan what exactly I want to build. Cheers --- In cgs_synth@yahoogroups.com , Dave Kendall wrote: > > MOTM used to make a PSU complete with front panel as a kit, (MOTM 900) > using a power one HBB15. (0.8A per rail) > Not sure if it is still
2012-09-19 by Dave Kendall
MOTM used to make a PSU complete with front panel as a kit, (MOTM 900) using a power one HBB15. (0.8A per rail) Not sure if it is still being sold, but power-one's are dead easy to wire up - basically just mains wire, socket and fusing, and then run the ±15V to the distro board o
2012-09-19 by fuyuhiko
Thank you for the reply. Is the Power-one used for each synthesizers by encasing with circuits or does anyone make a power supply with it? --- In cgs_synth@yahoogroups.com , "goldencardigan" wrote: > > Also keep an eye on ebay for power-one or condor brand linear power supplies.
2012-09-17 by Dave Kendall
+1 for power one supplies. I have a HBB15, which as a bonus, shuts down in the case of a reversed power connection to a module. Very nice to have. cheers, Dave On 15 Sep 2012, at 22:09, fuyuhiko wrote: > Hello there. > > This is totally newbee question. I'm thinking of buying a l
2012-09-17 by bill bigrig
Yes, definatelu Power One. The synth.com uses them and they are excellent! We have 10 or 12 here at work in the parts cabinet, but they are straight 24VDC. They work extremely well for anything I throw at them. We have several models, going up to 2.4 amps. Rig [Non-text portions
2012-09-17 by goldencardigan
Also keep an eye on ebay for power-one or condor brand linear power supplies. Lots of DIY'ers use them. You will spot one or two hiding in back of Fonitroniks racks on his website. You can find them in lots of different volatges and up to 1.5amps. Reasonably easy to wire up. ---
2012-09-17 by Elby Designs
I will repeat.... Doepfer is 12V NOT 15V and CANNOT be modified Best Regards Laurie Biddulph Mobile: 0400 257 645 Phone: +61 (0)2 4340 0938 Web: www.elby-designs.com Elby Designs 9 Follan Close Kariong NSW 2250 Australia -----Original Message----- From: cgs_synth@yahoogroups.com
2012-09-16 by fuyuhiko
Thanks for all generous replies, it's very helpful and I've been relieved. The linear power supply seems not bad, but can be confusing as Ove said. I will consider buying either Doepfer one or customizing the linear power supply to be easily used. Thank you very much and good luc
2012-09-15 by Elby Designs
The Doepfer Kits are only 12V. They do not do a 15V version. Doesn't need to be linear nowadays, technology has improved substantially and now switch-mode supplies are used in sensitive areas like-medicine and audio. My Heavy-duty supply is available in 12V @ 3.7A per rail and 15
2012-09-15 by roglok
These seem to be quite popular too: http://www.tiptopaudio.com/zeuspwr.php although, like the Doepfer, they provide only +/-12V... Here's an example for a pre-built 15V PSU, but be aware that it only delivers 500mA: http://www.blacet.com/misc.html --- In cgs_synth@yahoogroups.com
2012-09-15 by Ove Ridé
On 15 September 2012 23:09, fuyuhiko hiko_goldenballs@... > wrote: > Hello there. > > This is totally newbee question. I'm thinking of buying a linear power > supply to get DC +/-15V as building a power supply seems difficult for me. > > For instance; > > http://www.conrad-uk.com
2012-09-15 by fuyuhiko
Hello there. This is totally newbee question. I'm thinking of buying a linear power supply to get DC +/-15V as building a power supply seems difficult for me. For instance; http://www.conrad-uk.com/ce/en/product/511815/VOLTCRAFT-VLP-2403-240W-DC-Power-Supply-Linear/2110330&ref=li
2012-09-12 by sasami@hotkey.net.au
>Where is the best place to tap 'pos' and 'neg' busses from on that board ? The back of the power connector always works :) Ken _______________________________________________________________________ Ken Stone sasami@... otherunicorn@... Modular Synth PCBs for sale http://www.cgs
2012-09-12 by sasami@hotkey.net.au
> > >A couple more questions. > > >There isn't a second OFS pad provided on this board. I've already used the OFS pad for OFFSET VC. >Where can i put the OFFSET Wiper connection ? Through an external resistor to M1 - Look at the V1 documents linked from the top of the page. http:
2012-09-12 by Stephen Richards
A couple more questions. There isn't a second OFS pad provided on this board. I've already used the OFS pad for OFFSET VC. Where can i put the OFFSET Wiper connection ? Also , there's no INIT STEP CV pad. Where is best to attach the INITIATION pot Wiper ? ________________________
2012-09-12 by Stephen Richards
Cheers Ken Where is the best place to tap 'pos' and 'neg' busses from on that board ? ________________________________ From: " sasami@... " sasami@... > To: cgs_synth@yahoogroups.com Sent: Wednesday, September 12, 2012 1:20 PM Subject: Re: [cgs_synth] CGS 40 - Modulo Magic >I hav
2012-09-12 by sasami@hotkey.net.au
>I have run into a problem , i am changing out the 100K resistors for the 560K and 470K and there are some conflicting pieces of information. Schematic is incorrect. I'll fix it. Thanks for pointing it out. Correct: >OFS and REF - 470K > > SS - 560K >Also , i have the earlier ver
2012-09-12 by Stephen Richards
Hi Ken I have run into a problem , i am changing out the 100K resistors for the 560K and 470K and there are some conflicting pieces of information. On the schematic the resistors are marked : OFS and SS - 470K REF - 560K On the wiring diagram at the bottom of the page : OFS and R
2012-09-02 by sasami@hotkey.net.au
>I'd like to use a cgs60 stomp box adapter, >sometimes for connecting 3 stomp boxes, and sometimes for connecting 3 external sources. >Is this possible? Yes. The attenuator and preamp are two separate circuits and can be used independently. >Can I wire all 3 submodules as stomp b
2012-09-02 by sirolffoonav
Hi group! Maybe someone build this module already and has tips for me. I'd like to use a cgs60 stomp box adapter, sometimes for connecting 3 stomp boxes, and sometimes for connecting 3 external sources. Is this possible? Can I wire all 3 submodules as stomp box adapters and not u
2012-08-23 by sasami@hotkey.net.au
--- In cgs_synth@yahoogroups.com , eric Dtreize wrote: > In the euro version there are caps in parallel with the return of > ouputs to - -minus) input. These stop the op-amps from self-oscillating. It is good practice to include them. > In the general version there is a second re
2012-08-23 by eric Dtreize
This is my first message to the list, hello to everybody. I'm thinking about building a cgs 33 matrix mixer. But I see two different versions (I know, one is for eurorack, the other one for anything else :)). In the euro version there are caps in parallel with the return of ouput
2012-08-22 by Dan Leuca
resonant EQ Serge (PCB + parts) Digisound 80-2 VCO MOTM panels x 2 Digisound 80-7 VCF MOTM panel + PCB + SEM2040 Clone chip also MIDI 2 SDS Kit(PCB + parts) ________________________________ From: " david.salter@... " david.salter@... > To: cgs_synth@yahoogroups.com Sent: Wednesda