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cgs75 Serge VCS in MOTM

cgs75 Serge VCS in MOTM

Project

Projecttitel:cgs75 Serge VCS in MOTM

Status:FINISHED

Startdate: 28.02.2014

Duedate: 02. July 2014

Manufacture link: http://cgs.synth.net/

related articles:

http://electro-music.com/forum/post-281432.html

 

 

BOM:

Part

Quantity

my info

Capacitors

47pF

9

mlcc

1n

2

wima mks

10n

2

wima mks

22n

1

wima mks

100n

6

wima mks

10uF 25V

2

 

47uF 25V

1

 

Resistors 1% Metallfilm

100R

1

 

330R

2

 

1k

2

 

1k8

1

 

2k2

3

 

8k2

1

 

33k

2

 

68k

1

 

82k

5

 

100k

18

 

150k

1

 

200k

1

 

220k

4

 

330k

3

 

470k

2

 

600k

1

 

820k

4

 

1M

9

 

10M

2

 

100k trimmer

1

 

50k lin pot (FALL,RISE POT

2

 

20k lin pot for processor

1

 

100k lin pot (CV-pots)

2

 

Semi's

LED

1

 

1N4148

6

 

2N3904

3

 

2N3906

3

 

5V6 400mW Zener

1

 

TL071

1

 

TL072

2

 

TL074

1

 

LM3900

1

 

Misc.

Ferrite Bead

2

 

SPST switch

3

 

0.156 4 pin connector

1

 

CGS75 PCB

1

 

Panel Bridechamber

1

 

PotBracket - own

1

 

 

Wiring:

ac out

ac out jack

bo

bi-polar output jack

out

out jack

trig in

trigger in jack

cy sw

(x 2) cycle switch. Switch connects these together for cycle mode

end

end out jack

rrw

rise rate wiper

 

CW end of rise rate pot connects to +ve

 

CCW end of rise rate pot connects to 0V

frw

fall rate wiper

 

CW end of fall rate pot connects to +ve

 

CCW end of fall rate pot connects to 0V

exp

exponential cv jack

rise cv

rise cv jack

both cv

both cv jack

in

input jack

swf

(x 2) fall switch. Switch connects these together for exp. response.

swr

(x 2) rise switch, Switch connects these together for exp. response.

rw

rise pot wiper

rccw

rise pot counter-clockwise

rcw

rise pot clockwise

fcw

fall pot clockwise

fccw

fall pot counter-clockwise

fw

fall pot wiper

fcv

fall cv jack

pout

processor output jack

pccw

processor pot ccw

pcw

processor pot cw

pr1

processor input

pr2

processor pot wiper



Setting up - Calibration

Adjustments on the VCS board are set to obtain a 0 to +5 volt level when the unit is cycling, producing a 100Hz triangle wave. An oscilloscope is required for this adjustment. In an oscilloscope is not available, adjust for the least distorted sounding waveshape.

 

 

 

 

Schematics:

keep attention on the Processori input jack with 200K resistor at the jack switch to +V.

also make sure you have all 3  "bridges" correctly filled with a piece of wire or rest from a resistor leg, otherwise the module dont work correct.

 

 

 

Related content

how to bugfix: https://diysynth.wiki.dsl-man.de/wiki/spaces/SKM/pages/336101402/How+to+bugfix

non commercial pages, all infos are best can do without warranty, without liability.