Using L298N To contorl DC Motors with Potentiometer and 3 Push buttons -Example 1

Project Video
Project Details

This this video shows how to use L298N Module to control 2 DC Motor fully with Robojax Library. We are using 3 push buttons to STOPClockwise CW, or Counter Clockwise CCW.Please watch video for instruction. Download library.

In this page you will codes to control 1 motor and 2 motors using L298N Motor Controller module

See Code to control 2 DC motors using L298N Module with push button and pot -Example 2

Project Code

 * Library Example for L298N Module to control DC 1 motor with 3 push buttons (see the link for controlling 2 motors)
 * This code is to control DC motors using two potentiometer (variable resistors)
 * Written by Ahmad Shamshiri on October 11, 2019  
 * in Ajax, Ontario, Canada.
 * Watch video instruction for this code:
 * Get this code and other Arduino codes from
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 *  * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.* 
 * This code has been download from
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see .

// motor 1 settings
#define IN1 2
#define IN2 4
#define ENA 3 // this pin must be PWM enabled pin

const int CCW = 2; // do not change
const int CW  = 1; // do not change

#define motor1 1 // do not change
#define motor2 2 // do not change

//*** Potentiometer and push button for motor 1 started 

const int motor1PushButtonCW = 8;
const int motor1PushButtonStop = 9;
const int motor1PushButtonCCW = 10;
const int pot1Input = A0;
const int motor1Minimum =15;//30% is minimum for motor 1

// do not change below this line
int motor1Direction =CCW;//
int motor1StopState=HIGH;//Stope state of motor 1
int motor1Speed =0;// speed of motor 1
//*** Potentiometer and push button for motor 1 ended

// use the line below for single motor
Robojax_L298N_DC_motor motor(IN1, IN2, ENA, true);

// use the line below for two motors
//Robojax_L298N_DC_motor motor(IN1, IN2, ENA, IN2, IN3, ENB, true);

void setup() {

  //L298N DC Motor by
  pinMode(motor1PushButtonCW, INPUT_PULLUP);
  pinMode(motor1PushButtonStop, INPUT_PULLUP);
  pinMode(motor1PushButtonCCW, INPUT_PULLUP); 

void loop() {
  updateState1();//read all push buttons
  int pot1Value= analogRead(pot1Input);// read potentiometer value

  motor1Speed = map(pot1Value, 0,1023, motor1Minimum, 100);// convert 0-5V to 0-100%

  if(motor1StopState ==HIGH)
    motor.rotate(motor1, motor1Speed, motor1Direction);    

  //motor.rotate(motor1, motor1Speed, CW);//run motor1 at 60% speed in CW direction


 * updateState1()
 * @brief reads push buttons and updates values
 * @param none
 * @return no return
 * Written by Ahmad Shamshiri for
 * on Oct 11, 2019 in Ajax, Ontario, Canada
void updateState1()

  if(digitalRead(motor1PushButtonCW) ==LOW && motor1StopState !=LOW){

   motor1Direction =CW;// CW button is pressed  
   motor1StopState =LOW;

  if(digitalRead(motor1PushButtonCCW) ==LOW && motor1StopState !=LOW)
   motor1Direction =CCW;
   motor1StopState =LOW;   

  if(digitalRead(motor1PushButtonStop) ==LOW)
   motor1StopState =HIGH;// STOP button is pressed 
}//updateState end

Required File(s)

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