Sometimes, the control circuit has also to be insulated from the mains voltage. This occurs, for example, when the MCU reference is not the same than the AC switch reference. This is the case with new ...

This file type includes high resolution graphics and schematics when applicable. This 8051 microcontroller-based control circuit adjusts the speed of a small permanent-magnet dc motor via ...

Low-Cost Circuit Controls PM DC-Motor Speed Sept. 29, 2003 The motor-speed-control circuit in the figure shows an SG3524 pulse-width-modulation (PWM) IC, U2, driving the high side of a motor ...

The triac will not usually need a heat sink as the fan current, and triac duty cycle, are generally low enough for free air cooling (but do you own calculations!). With my test fan, the rotation ...

Approx circuit of DC-51 motor speed controller (D6 and D8 are the wrong way around, and there may be more errors). And the more I looked at the circuit, the more I liked the speed controller. Update ...