Hi Tomek

> hey, thanks guys! i do have an old powershot (pot based, with
> autofire :) if it's only the matter of replacing resistors it's no
> problem.

The problem is that the pots in the external joy sticks are special
constructions (quite complicated double axises), so it is close to
impossible to replace them if the values do not fit to the A-174's
schematic.

> p.s. serial mouse would be nice too :)

A serial mouse is a kind of digital counter (like a rotary encoder). So
perhaps one could try to build something, that connects a mouse to a
Doepfer "Dial Electronic" ( http://www.doepfer.de/de.htm) .

Florian