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  1. M

    E bike controller question

    I have an older Chinese made 36 V brushed controller made by senyuan It has 6 power transistors, a Fairchild PWM microchip and 2 large capacitors, some zenners and a diode, and a couple of small chips, look like 555s but cant tell. One of the caps is leaking, so I will replace it. Its a 63...
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