Potentiometer Simple Dc Motor Speed Control Circuit. The working of arduino program is very simple as it reads the voltage from the analog pin a0. Now you can easily control the speed of the dc motor by rotating the potentiometer.
1 connect the base of the transistor to a 220ohms resitor and connect the end of the resistor to digitalpin3 on the arduino. The mcu must be supplied with 5v between pins vdd and vss. 3 easy to build speed controller circuits for dc motors are presented here one using mosfet irf540 second using ic 555 and the third concept with ic 556 featuring torque processing.
As this circuit use pwm so this is also energy efficient.
Last updated on january 16 2021 by swagatam 239 comments. A circuit which enables a user to linearly control the speed of a connected motor by rotating an attached potentiometer is called a motor speed controller circuit. Pic16f877a ccp1 module is used as pwm with a frequency of 500hz. 2 connect the collector of the transistor to a negative of a diode and connect the end of the diode to gnd.
