Would be great if you could put the schematic sources and PDf file on github, and use github as the main sources versioning and file repository.nieles wrote: ↑May 26, 2018 9:58 amThe first part of the Schematic is done (the interesting bits LOL)
few intersting things i see:
PA2 needs to be logic HIGH to keep the LCD on. this works like a keep alive. write a low and the LDO loses power and turns off (i tested this behaviour)
with PE3 you can short part of the resistors before the LDO. i think this is to accomodate different input voltages.
we need to do some math to figure out what is possible here.
I see on the market only 2 different versions: 24/36/48V and 72V versions. For my calcs, the version I use for the 48V, can read ADC battery voltage up to 68.5V (0.0672 volts per each ADC unit).
Also, when I put a battery voltage less than 26V, the LCD starts to fade out... so I would say I need to PE3 = 1 on this low voltage, as for 24V battery, the low voltage can go up to 20V.