The MOSFET then modulates the 24V-dc motor-supply rail and thus generates a more-than-95%-efficient, programmable motor-speed control. The motor's armature inductance combines with flyback diode D3 to ...

If you've got an Arduino of any variety, you might have noticed some of the pins on the board have a tilde mark or PWM printed next to them. What is PWM?

It’s an excellent way to learn about both PWM motor control and the use of 555 timers, all with a very low parts cost and readily available components.

A PWM speed control, it promises cool motor operation, long brush life, low noise, and a wide speed range. For more info, call BODINE ELECTRIC CO., Chicago, IL. (800) 726-3463.

The claim is that it can reject PWM slew rates of >500V/µs and settles within 500ns to provide a 0.3% accurate (of full-scale) measurement of winding current “allowing motor control designers to ...