Is my L293D H Bridge Dead?

Other Hardware Motors, Mechanics, Power and CNC
1

Hello,

I'm working on a simple circuit to control two DC motors using a L293D H Bridge.

Both motors will go forward. Only one will go backward.

Motor B will go forward and backward.
Motor A will only go forward.

My code and wiring looks good, to my eye. Not sure whats going on.

As I understand it, the L293D is essentially 4 half h bridges. Could it be one of these halves is dead? Is there a way to test this?

Code is pasted below. Wiring pics are attached.

I'm coping this tutorial.

http://blog.whatgeek.com.pt/2015/03/arduino-l293d-dc-motors-control/

Thanks.

int go_A = 5;
int A_1 = 6;
int A_2 = 7;

int go_B = 8;
int B_1 = 9;
int B_2 = 10;

void setup() {
Serial.begin(9600);
pinMode(go_A, OUTPUT);
pinMode(A_1, OUTPUT);
pinMode(A_2, OUTPUT);
pinMode(go_B, OUTPUT);
pinMode(B_1, OUTPUT);
pinMode(B_2, OUTPUT);

}

void loop() {
  Serial.println("MOTORS GO!");
  digitalWrite(go_A, HIGH);
  digitalWrite(go_B, HIGH);
  delay(1000);

  Serial.println("MOTORS FOWARD!");
  digitalWrite(A_1, LOW);
  digitalWrite(A_2, HIGH);

  digitalWrite(B_1, LOW);
  digitalWrite(B_2, HIGH);

  delay(3000);

  //Serial.println("MOTORS BACKWARDS!");

  digitalWrite(A_1, HIGH);
  digitalWrite(A_2, LOW);

  digitalWrite(B_1, HIGH);
  digitalWrite(B_2, LOW);

  delay(3000);

  Serial.println("MOTORS STOP!");

  digitalWrite(go_A, LOW);
  digitalWrite(go_B, LOW);
  delay(3000);
}
2

Problem solved! I had my enabled pin wired to an input pin. Simple fix and works great!