> -----Ursprungliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto: Doepfer_a100@yahoogroups.com ]Im Auftrag von James Husted
> Gesendet: Samstag, 2. Februar 2013 08:41
> An: Doepfer_a100@yahoogroups.com
> Betreff: 1 Can I mod a A-152 to do this
>
>
> I recently got an A-152 and am using it to select the columns of
> two of my PGM-4X4 programmers to make sequences that can have
> programmable patterns to them. What I would like is to mod the
> A-152 so that I can add an output that produces a trigger
> whenever the A-152 addresses a new step. This way something like
> a sine wave into the A-152 would make the PGM-4X4 work like a
> pendulum and would also produce triggers to fire off envelope
> generators whenever a new address/column/note happened. Is there
> some internal circuit logic that can be added to create a trigger
> out like this

This is also available as an internal "hidden" feature since about 2005.
The RC4 port pin of the microcontroller (pin 6) outputs a short pulse
whenever the address changes. The signal is also available at the expansion
connector on pin 2. Pay attention that the signal is not buffered and not
protected against short or electrostatic charge (it's the "pure" RC4 port
signal). The microprocessor will be damaged if a voltage or GND is applied
to this pin. You have to add a suitable buffer to protect the processor. Do
not simply connect it to a socket !

Best wishes
Dieter Doepfer