Hey Guys,
Referring to this link , http://www.cpemma.co.uk/pwm.html , they are using Pulse Width Modulation to control the speed of a motor. The potentiometer controls the reference voltage, and hence the duty cycle of the pulses.
My question is, why is such a circuit required? Why not simply connect the motor to a Voltage Divider with a pot ? Wouldn't varying the voltage across the motor vary its speed? Or is there something i'm missing ?
Thanks Guys
Referring to this link , http://www.cpemma.co.uk/pwm.html , they are using Pulse Width Modulation to control the speed of a motor. The potentiometer controls the reference voltage, and hence the duty cycle of the pulses.
My question is, why is such a circuit required? Why not simply connect the motor to a Voltage Divider with a pot ? Wouldn't varying the voltage across the motor vary its speed? Or is there something i'm missing ?
Thanks Guys