The controller doesn't seem to be a speed control so much as it is a sensor-controlled on/off button. But I cannot discount the possibility that the pulse width might be varied - though if it is then I didn't notice it with my un-loaded bench test.
I've got it rigged-up to another PWM controller I liberated from an expired E-bike. And it works very well.
I also found that while using the speed control, you can bridge the motor's negative to the battery negative then you get full power - sort of like a turbo. The good part about that is that bridging the controller doesn't destroy it.
The original controller has four very chunky-looking semiconductors and my plan is to make a new driver for them - I'll make it with an astable multivibrator because I'm challenged with anything else. This should be relatively easy, don't you think?
Maybe I'll see if I can remove the two semiconductors in the E-bike controller I've got it wired to and put the four larger ones from the original controller in instead?
* Velly solly about pics! I really want to! Once someone holds my hand and teaches me how to do it then I'll inundate the place with videos and my pics. My computer is Japanese and I can't do much with the programming. I can speak Japanese all right but I can't read it much. - And my wife can read the programming jargon but she needs me to tell her what it means. *sigh*
