Here I control the rotation of a Mitsumi M42SP-5 stepper motor (50 ohm) with a potentiometer, using an Arduino Uno. Since the motor needs 12V to work, a ULN2003A darlington array is used.

In this project we are controlling DC Motor speed using PWM and we will be able to control the speed of DC motor with potentiometer and we can adjust the speed by rotating the knob of Potentiometer.

Here I control the rotation of a Mitsumi M42SP-5 stepper motor (50 ohm) with a potentiometer, using an Arduino Uno. Since the motor needs 12V to work, a ULN2003A darlington array is used.

In this tutorial we will learn basics and working of stepper motors and then will interface stepper motor with arduino uno and write the arduino stepper motor position control code.

It’s a simple enough set-up in which a voltage controlled current source feeds the pot while an Arduino with a motor controller turns it through a stepper motor, and takes a voltage reading from ...

As he manipulates the replica, the values of the potentiometers are read by a Raspberry Pi and some custom Python code which sends the appropriate G-code to the Arduino/grbl controlled robot arm.

This is an easy tutorial showing how you can control the brightness of an LED or adjust the speed of a DC fan using Arduino Board, a small BC547 transistor and a potentiometer.