J'ai reçu ça par mp mais je sèche un peu sur la traduction, une âme charitable...

I'm the sender of that MP. And to be honest, you are right it's a mess and full of errors 

What I mean is:
-Clutch output signal is VERY disturbed
-If I touch Pin 1 of U4 with an oscilloscope probe the cluch will be more powerfull

To resolve that issue I put a 1uF capacitor on clutch output.

The clutch output signal is now stable and without any ripple.

And I burned the Logitech output chip becouse of my messy prototype setup, I was sure it was disconnected, but it wasn't 

Thanks

surtout que (si c'est bien le même ) il avait l'air en très bon état
avant de ce faire 

No it's not the same

This is my GF2 it will be one of my project for the next year. Motor Trouble anyone???
The one i posted is in Poland (IIRC).
sorry for posting in English, but "merci" is the only French word i know, and using a translator cause only missunderstand I think.