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Pulse-width modulation, is varying the duty cycle of a rectangle wave, usually with a constant frequency.

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280mA. I want to control the voltage using the arduino thru the use of PWM from the arduino. So in theory a 50% duty cycle of the arduino will give me half the voltage from collector to emitter. I tried … using PWM without any capactiors and it ended up making the motor whine and might end up damaging it. The BJT that I will be using is the TIP120 with a beta of 1000. Here's the schematic, I …
asked Apr 28 by John