Motor pins don't work? PWM

Other Hardware Motors, Mechanics, Power and CNC
1

Hi,
I created an obstacle avoiding robot based on this tutorial:

I think every cable is in the right pin, I soldered it in a copy of arduino uno that has holes that are easier to solder than original arduino uno. I have two motors. One is on ppin 6 and 9 and works, on my voltage meter it shows 4,9 V when looking over the motor driver, and about 2V if i measure directly on arduino (and the motor stops for some reason). And this motor is working fine. I also have another motor on pins 10 and 11. The motor doesn't spin, there is no voltage on the motor driver or on the arduino board directly. For test i used this code:

const int motorA1= 6; //motor A positive (+) pin to pin 6 (PWM) (from L298 module!)
const int motorA2= 9; //motor A negative (-) pin to pin 9 (PWM)
const int motorB1=5; //motor B positive (+) pin to pin 10 (PWM)
const int motorB2=11; //motor B negative (-) pin to pin 11 (PWM)
void setup() {
// put your setup code here, to run once:
;
}

void loop() {
// put your main code here, to run repeatedly:
digitalWrite(motorA1, HIGH);
digitalWrite(motorA2, LOW);
digitalWrite(motorB1, HIGH);
digitalWrite(motorB2, LOW);
}

I used this to check if the motors are working. As I said, only one motor works. I have also opened the motor because I thought it was bad but I think that is not the problem. For some reason, arduino doesnt send 5V over pin 10 and pin 11.

Help appreciated.

2

Pins are input by default. Try adding this to you setup code.

void setup()
{
   pinMode(motorA1, OUTPUT);      // motor A positive (+) pin to pin 6 (PWM) (from L298 module!)
   pinMode(motorA2, OUTPUT);     
   pinMode(motorB1, OUTPUT);  
   pinMode(motorB2, OUTPUT);   
}
3

corix1337:
http://www.instructables.com/id/Arduino-Obstacle-Avoiding-Robot-2/?ALLSTEPS

Never heard of codebender before... why would anyone want to program an Arduino from a browser?

4

Still doesn't work. I dont use codebender either, I copied it to arduino.

This is the code I used to test it. pin 6 and 9 are 5V, 10 and 11 dont give anything (0V).

const int motorA1= 6;     //motor A positive (+) pin to pin 6 (PWM) (from L298 module!)
const int motorA2= 9;         //motor A negative (-) pin to pin 9 (PWM)
const int motorB1=10;     //motor B positive (+) pin to pin 10 (PWM)
const int motorB2=11;     //motor B negative (-) pin to pin 11 (PWM)
void setup() {
  // put your setup code here, to run once:
; 
{
   pinMode(motorA1, OUTPUT);      // motor A positive (+) pin to pin 6 (PWM) (from L298 module!)
   pinMode(motorA2, OUTPUT);     
   pinMode(motorB1, OUTPUT);  
   pinMode(motorB2, OUTPUT);   
}
}

void loop() {
  // put your main code here, to run repeatedly:
 digitalWrite(motorA1, HIGH);
  digitalWrite(motorA2, LOW);
  digitalWrite(motorB1, HIGH);
  digitalWrite(motorB2, LOW); 
}
5

Try this code instead of yours and tell us the results.The Code is for one motor, so try it on the first motor and then for the second.

void setup() {
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
}

void loop() {
  digitalWrite(8, HIGH);
  digitalWrite(7, LOW);
  analogWrite(9, 255);
  delay(1000);
  digitalWrite(8, LOW);
  digitalWrite(7, HIGH);
  analogWrite(9, 255);
  delay(1000);