Fakes the Battery Protocol to attach any 36V Battery to your Haibike / Yamaha ebike drivesystem.
code is available in old version, havent modified for this PCB yet. this pcb uses different voltage divider values and software serial.
https://endless-sphere.com/forums/viewtopic.php?f=14&t=70198&p=1302126 ( ENGLISH )
the dc dc converter needs to be able to handle the fully charged 42V battery. i picked this one http://www.ebay.de/itm/282353144272 and eyeballed the pinhole dimensions.