Introduction: Arduino Control DC Motor Speed and Direction Using a Potentiometer
In this tutorial we will learn how to use a L298N DC MOTOR CONTROL driver and a potentiometer to control a DC motor speed and direction.
Watch a demonstration video.
Step 1: What You Will Need
- Arduino UNO
- L298N DC MOTOR CONTROLER
- DC Motor
- Battery pack
- Jumper wires
- Visuino program: Download Visuino
Step 2: The Circuit
- Connect digital pin(2) from Arduino to motor driver pin (IN2)
- Connect digital pin(3) from Arduino to motor driver pin (IN1)
- Connect DC one motor to one side of motor driver
- Connect Power supply (batteries) pin (gnd) to motor driver controler pin (gnd)
- Connect Power supply (batteries) pin (+) to motor driver controler pin (+)
- Connect GND from Arduino to motor driver controler pin (gnd)
- Connect potentiometer pin (DTB) to Arduino Analog pin (A0)
- Connect potentiometer pin (VCC) to Arduino pin (5V)
- Connect potentiometer pin (GND) to Arduino pin (GND)
Step 3: Start Visuino, and Select the Arduino UNO Board Type
To start programming the Arduino, you will need to have the Arduino IDE installed from here: http://www.arduino.cc/.
Please be aware that there are some critical bugs in Arduino IDE 1.6.6. Make sure that you install 1.6.7 or higher, otherwise this Instructable will not work! If you have not done follow the steps in this Instructable to setup the Arduino IDE to program ESP 8266! The Visuino: https://www.visuino.eu also needs to be installed. Start Visuino as shown in the first picture Click on the "Tools" button on the Arduino component (Picture 1) in Visuino When the dialog appears, select "Arduino UNO" as shown on Picture 2
Step 4: In Visuino Add AND Connect Components
- Add "Dual DC Motor Driver Digital and PWM Pins Bridge (L9110S, L298N)" component
- Connect Arduino AnalogIn  to DualMotorDriver1mptors pin [In]
- Connect DualMotorDriver1 pin Direction[B] to Arduino digital pin 
- Connect DualMotorDriver1 pin Speed[A] to Arduino digital pin 
Step 5: Generate, Compile, and Upload the Arduino Code
In Visuino, Press F9 or click on the button shown on Picture 1 to generate the Arduino code, and open the Arduino IDE
In the Arduino IDE, click on the Upload button, to compile and upload the code (Picture 2)
Step 6: Play
If you power the Arduino Uno module and add batteries for motor controller, the DC motor is ready to spin.
By sliding potentiometer you can regulate the motor speed and change the direction. The stopping point is in the middle of the potentiometer and if you slide it to the left it will go to one direction and if you slide it to the right it will go to another direction.