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 with two buttons and display the potentiometer value on the OLED Display.

Watch a demonstration video.

Step 1: What You Will Need

Arduino UNO
L298N DC MOTOR CONTROLER
DC Motor
OLED Display
Battery pack
Potentiometer
Jumper wires
Two push buttons
2x 1K ohm resistor
Breadboard
Visuino program: Download Visuino

Step 2: The Circuit

Connect Arduino Pin 5V to breadboard positive pin (red line)
Connect Arduino Pin GND to breadboard negative pin (blue line)
Connect button1 first pin to breadboard positive pin (red line)
Connect button1 second pin to arduino digital pin 6
Connect button1 second pin to resistor1
Connect button2 first pin to breadboard positive pin (red line)
Connect button2 second pin to arduino digital pin 7
Connect button2 second pin to resistor2
Connect resistor1 to breadboard negative pin (blue line)
Connect resistor2 to breadboard negative pin (blue line)
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)
Connect OLED Display pin (GND) to Arduino pin (GND)
Connect OLED Display pin (VCC) to Arduino pin (5V)
Connect OLED Display pin (SCL) to Arduino pin (SCL)
Connect OLED Display pin (SDA) to Arduino pin (SDA)

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
Add "Speed and Direction To Speed" component
In the "Properties window " set "Initial Reverse" to "True"
Add "SR Flip-Flop" componentConnect Arduino Board digital pin[6] to "SRFlipFlop1" pin[Set]
Add "SSD1306/SH1106 OLED Display (I2C)" component
Double click on the "DisplayOLED1" and in the elements window drag "Text Field" to the left and in the properties window set size:3, Y:30

Connect Arduino Board digital pin[7] to "SRFlipFlop1" pin[Reset]

Connect Arduino Board AnalogIn pin[0] to "SpeedAndDirectionToSpeed1" pin[Speed]
Connect Arduino Board AnalogIn pin[0] to "DisplayOLED1">Text Field1 pin[In]
Connect "DisplayOLED1" pin Out[I2C] to Arduino board pin I2C
Connect "SRFlipFlop1" pin[Out] to "SpeedAndDirectionToSpeed1" pin[Reverse]
Connect "SpeedAndDirectionToSpeed1" pin[Out] to "DualMotorDriver1" > Motors[0] pin [In]
Connect "DualMotorDriver1" > Motors[0] pin [Direction(B] to Arduino board digital pin[2]
Connect "DualMotorDriver1" > Motors[0] pin [Speed(A)] to Arduino board digital pin[3]

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 by pushing the buttons. The potentiometer value will be displayed on the OLED Display. Congratulations! You have completed your Project. Also attached is the Visuino project, that I created for this Instructable. You can download it here and open it in Visuino: https://www.visuino.eu