Another Wonderfull Panel for Bosch AXT plant grinder

One summer evening, I was trying to repair my Bosch AXT plant grinder.
As on many models, the power resistance of the triger transistor had burned. Design error ....
But I was a little drunk and I dropped the electronic card which caused his death.

So I redid all the electronics with an arduino, relays and new buttons.
The buttons are here, I lost the original schema!