L298N motor driver not working with Arduino UNO R3

Question

I was trying to use the motor driver, but the motors aren't spinning for some reason.

I am sure the motors are working; I tried and tested them. I can't understand if there is a problem with the code, motor driver or the Arduino board.

Arduino board used: Arduino UNO R3

Here is the code:

char data; //Serial
void setup() {
 // put your setup code here, to run once:
 pinMode(4, OUTPUT);
 pinMode(5, OUTPUT);
 pinMode(6, OUTPUT);
 pinMode(7, OUTPUT);
 Serial.begin(9600);
}
void loop() {
 // put your main code here, to run repeatedly:
 if (Serial.available()) {
 data = Serial.read();
 Serial.println(data);
 }
 if (data == '1') {
 digitalWrite(4,HIGH);
 digitalWrite(5,LOW);
 digitalWrite(6,HIGH);
 digitalWrite(7,LOW);
 }
}

Answer 1

I do not see any problem with your code. However, the code must be compatible with the circuit connections. Please check your whole setup part by part. Check the motor driver with a direct power supply. See if you get the expected output. The motor may not spin due to insufficient voltage and/or current too. So, check your power supply with a multimeter. Since you are sending commands through the serial monitor, check if there has been any baud rate mismatch. You can also check this tutorial for some help: https://www.theengineeringprojects.com/2017/04/dc-motor-direction-control-arduino.html

• KnightRiderDutt: Thanks!! I found the problem though. Somehow the motors got damaged during soldering.
• jsotola: @KnightRiderDutt you said that you tested the motors
• KnightRiderDutt: They were working then. No idea what happened