zappy wrote: The tiny R12 resistor is low voltage cut out. So we removed that and it now has 8Kw in and offers heaps of grunt. Infact in the short 2Km test ride at 1 a.m...
I know this is an old thread but it came up on a Google search for EB224 and there is a piece of misinformation that I want corrected.
Just to clarify when he says "removed that" what he means is that he replaced that resistor with one that was slightly larger so that the uController saw a voltage was above the point at which LVC should be applied. "removing" R12 would result in applying full system voltage to the A/D input of the uController through resistors R10 and R11... I guess the zener clamps on the chip might save you but that is a very bad idea. R10 and R11 are tied directly to system voltage, R12 is the lower leg of that divider, uController A/D input touches the top of R12
I wanted to clarify so that some poor sap down the road did not think that it was ok to remove R12.
Removing R12 would be a very bad idea and would only be survivable by pure luck.