Doepfer

I am completely ignorant about component of singles modules of system A 100. I use intuition and poor memory of school to understand.______In wich kind of modules i can find potentiometer 50k....100k? How i can connect it? Thank Robert

--- Lun 28/7/08, hardware@doepfer.de <hardware@doepfer.de> ha scritto:

Da: hardware@doepfer.de <hardware@doepfer.de>
Oggetto: AW: [Doepfer_a100] cv source -12 +12 volt
A: Doepfer_a100@yahoogroups.com
Data: Lunedì 28 luglio 2008, 10:40






> I need a cv source -12 + 12 volts to control a filtered coffé of
> analogue solution and doepfer synth. Doepfer is controlled by cv
> source -5 +5 volts; anyone know some modules like paia or banana logue.
> I think i can use Kenton prosolo mkII but i need only cv source not
> midi cv converter, any similar of A176 control voltage source but with
> 12volts output or little less. Thank Robert

If you increase the value of the three feedback resistors R4, R9 and R13
from 47k to 100k you obtain ~ 0...+11.5V (+12V are not possible because the
maximal output voltage of the operational amplifiers is a bit below the
supply voltage (+12V).
If you disconnect the terminal of the potentiometer at the front panel that
is connected to GND and wire it to +12V you obtain ~ -11.5....+11. 5V.

But a totally simple solution is to connect a potentiometer (typ. 50K...100k
linear) between -12V and + 12V and use it's center terminal as CV source. In
this case you obtain -12V...+12V.

Best wishes
Dieter Doepfer

 














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