Help for homework

Other Hardware Motors, Mechanics, Power and CNC
1

Can you help with an example Arduino code where you can adjust the motor speed with a potentiometer using Arduino Uno and L298N motor driver board?

2

You need to have a go at this yourself as it’s homework , otherwise it’s cheating !
If stuck people will help you with your code .
There are examples for analog read in the IDE and the motor boards have examples in their respective libraries .

3

then let me ask :slight_smile: is this code correct?

const int ENA = 10;   
const int IN1 = 9;    
const int IN2 = 8;    

const int potentiometerPin = A0;

void setup() {
  pinMode(ENA, OUTPUT);
  pinMode(IN1, OUTPUT);
  pinMode(IN2, OUTPUT);

  
  Serial.begin(9600);
}

void loop() {

  int potValue = analogRead(potentiometerPin);
  
 
  int motorSpeed = map(potValue, 0, 1023, 0, 255);

  
  Serial.print("Motor Speed: ");
  Serial.println(motorSpeed);
  
 
  analogWrite(ENA, motorSpeed);

 
  if (potValue > 512) {
    digitalWrite(IN1, HIGH);
    digitalWrite(IN2, LOW);
  } else {
    digitalWrite(IN1, LOW);
    digitalWrite(IN2, HIGH);
  }

  delay(100);  // Adjust the delay as per your requirement
}
4

When you tried the code, did it fail?

5

I have no means to test it, I just need to write code. Is useful?

6

then it doesn't matter if it correct or not

7

but i will score according to the code working

8

so you need to test it.
Please understand that it is YOUR homework

2 Likes
9

Yes, the code is useful.

10 
const byte
ENA = 10,
IN1 = 9,
IN2 = 8,
potentiometerPin = A0
;

void setup ()
{
  pinMode ( ENA, OUTPUT );
  pinMode ( IN1, OUTPUT );
  pinMode ( IN2, OUTPUT );
  Serial.begin ( 115200 );
}

void loop ()
{
  int motorSpeed = map ( analogRead ( potentiometerPin ), 0, 1023, -255, 255 );
  Serial.print ( "Motor Speed: " );
  Serial.print ( motorSpeed );
  analogWrite ( ENA, abs ( motorSpeed ) );
  if ( motorSpeed > 0 )
  {
    digitalWrite ( IN1, HIGH );
    digitalWrite ( IN2, LOW );
    Serial.println ( " CW" );
  }
  else
  {
    digitalWrite ( IN1, LOW );
    digitalWrite ( IN2, HIGH );
    Serial.println ( " CCW" );
  }
  delay ( 100 ); // Adjust the delay as per your requirement
}
11

What if it is zero?

12

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.