DC motor Control using joystick module.

Other Hardware Robotics
1

I am using an Arduino Nano to control a dc motor using a joystick module. I want to use the yAxis of joystick module to control the motor in both directions. But the motor only moves in 1 direction.

This is the code i used.

#define enA 9  
#define in1 5
#define in2 6

int  xAxis, yAxis;
int jPin1=A1;
int jPin2=A2;
int motorSpeedA = 0;
int motorSpeedB = 0;
 

void setup() {
  pinMode(enA, OUTPUT);
  pinMode(in1, OUTPUT);
  pinMode(in2, OUTPUT);

  Serial.begin(9600);

  

}
void loop() {

    xAxis=analogRead(jPin1);  
    yAxis=analogRead(jPin2);
    
    Serial.println(yAxis);
    Serial.println(xAxis);
  
  if (yAxis < 470) {

    digitalWrite(in1, LOW);
    digitalWrite(in2, HIGH);

    motorSpeedA = map(yAxis, 470, 0, 0, 255);
  }
  else if (yAxis > 550) {

    digitalWrite(in1, HIGH);
    digitalWrite(in2, LOW);
    
    motorSpeedA = map(yAxis, 550, 1023, 0, 255);
  }

  else {
    motorSpeedA = 0;
  }

  analogWrite(enA, motorSpeedA); // Send PWM signal to motor A
}
2

When i changed the yAxis < 470 : in1 and in2 to high and low it works but in same direction.

 if (yAxis < 470) {

    digitalWrite(in1, HIGH);
    digitalWrite(in2, LOW);

    motorSpeedA = map(yAxis, 470, 0, 0, 255);
  }
  else if (yAxis > 550) {

    digitalWrite(in1, HIGH);
    digitalWrite(in2, LOW);
    
    motorSpeedA = map(yAxis, 550, 1023, 0, 255);
  }

  else {
    motorSpeedA = 0;
  }
3

What motor driver? If it's L293 or L298 then you probably have a bad connection on either in1 or in2.

Steve

4

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