fechter wrote:Most controllers I've tested have about a 20k resistor from the signal pin to ground inside the controller. This makes another divider with the 550k and results in not enough output.
Ahah! You have helped me enormously. Armed with that knowledge, and some help from d8veh in the other thread, I have managed to get it to work. Swapped the 100k and 550k resistors out for 1k and 5k, dropped the 22k altogether and put in a 100microF cap to keep the ramp about the same, and bam! it works! Very nice. See http://endless-sphere.com/forums/viewto ... 85#p797385
Anyway, as noted there, I find it seems to work quite nicely, I am going to test it 'in anger' for a little while and see how I go. The only issue so far is that the cap drain time, while it is quite a lot quicker than the ramp up, still results in a little bit of 'run on' when you release the throttle. Not badly, but it's noticeable, and would be nicer without.
Can you suggest a modification to the circuit which would allow the capacitor to drain faster, when the button is released?
many thanks for your help so far!
2012 Avanti Aggressor
, 26", ex C'lyte HS3540, now Bafang BPM, 48V12Ah Headway LiFePO4
Scott Sub Commuter
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