I finally fixed the Raspberry Pi that powers a flipdot sign that shows when the next bus and tram leave at @chaostreffbern last night. Someone had broken it by shorting something after accidentally dropping a diode or something into it.
@alburkan@chaostreffbern As far as I know it is a module from an old train and we use an Arduino to control it. You'll have to ask @draemmli for more information as he installed it. I just set up the Raspberry Pi that runs the software that updates the train information.