However, in this case, the output of the 555 is connected to a MOSFET which is used to vary the speed of a computer fan motor.

This paper presents a DC motor speed controlling technique under varying load condition. The linear system model of separately excited DC motor with Torque-variation is designed using PID controller.

The DC motor speed control project is intended to manage the pace of a DC motor by means of an 8051 sequence micro-controller. The pace of DC motor is straightforwardly relative to the voltage ...

DC motor speed controller BMD-20DIN ver.2 Smart Motor Devices Smart Motor Devices Smart Motor Devices has improved the controller BMD-20DIN by expanding ways to control speed of DC motor – new ...

He hooks up the SN754410 to two motors, giving him speed and direction control for both based on the duty cycle of a PWM signal entering the chip for less than $2.50.

The circuit in the figure provides three levels of speed control for a dc motor, using a PC’s parallel port (LPT1). A C++ program performs the control functions by allowing the signals from the ...