Look at our A-100 DIY page. Here you find the circuit of a voltage inverter
(inverting amplifier). It's just the circuit that is used in the A-175 (in
the A-175 only LED displays have been added).

Best wishes
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto: Doepfer_a100@yahoogroups.com ]Im Auftrag von royce
> Gesendet: Freitag, 7. April 2006 14:28
> An: Doepfer_a100@yahoogroups.com
> Betreff: Re: 1 Digest Number 1448
>
>
> hi list,
>
> i am would like to trigger my cr80000 drum machine from my
> modular and via midi. . . but i've noticed that the cr8000
> internally seems to want a trigger signal that is the opposite
> polarity of the standard signal. i know that there are
> commercially available voltage invertors. the problem is i want
> to invert about 14 channels, so this would get prohibitively
> expensive. is this something that can be done easily anybody
> have any ideas, or a boatload of cheap voltage inverters
> royce
>
>
>
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