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I've been experimenting a bit with a number of different motors & controllers of Far Eastern origin - and found that the stated power of both motors & controllers is, well, at best - made up! I have an Arduino logging voltage, current (both accurately calibrated) & Temperature. The nominal...

I've built several electric bikes over the years. The only one on line is this: http://www.evalbum.com/609 Though there are some pictures of one of my folding recumbents here - but kind of small! http://www.sproklegrommet.co.uk/ More recently, I've been experimenting with a 3D Printed friction...