Cannot set Pins to LOW

Question

I am controlling 2 motors from my Arduino Pro Mini and L293D motor driver module. Problem is, I have to set a pin high and after 1 second set it to LOW. But that doesn't happen... The pin just stays HIGH and is never LOW.

Here's my Code -

    int IN2Left = 10;
    int E1 = 12;
    int E2 = 7;
    int IN3RevRight = 6;
    int trigPin1 = A0;
    int echoPin1 = A1;
    int distance1 = 0;
    int IN4Right = 5;
    int IN1RevLeft = 11;

    void setup()
    {
      pinMode(IN2Left, OUTPUT);
      pinMode(E1, OUTPUT);
      pinMode(E2, OUTPUT);
      pinMode(IN3RevRight, OUTPUT);
      pinMode(IN4Right, OUTPUT);
      pinMode(IN1RevLeft, OUTPUT);
      pinMode(trigPin1, OUTPUT);
      pinMode(echoPin1, INPUT);
      pinMode(13, OUTPUT);
      Serial.begin(9600);
    }

    void loop() {
  digitalWrite(13, HIGH);
  digitalWrite(E1, HIGH);
  digitalWrite(E2, HIGH);
  digitalWrite(IN2Left, HIGH);
  digitalWrite(IN4Right, HIGH);
  delay(3000);
  digitalWrite(IN4Right, LOW);
  digitalWrite(IN3RevRight,HIGH);
  delay(500);
  digitalWrite(IN3RevRight, LOW);
  digitalWrite(IN4Right, HIGH);
  delay(1500);
  digitalWrite(IN2Left, LOW);
  digitalWrite(IN1RevLeft, HIGH);
  delay(500);
  digitalWrite(IN1RevLeft, LOW);
  digitalWrite(IN2Left, HIGH);
  delay(100000);
    }

The IN2Left Pin never goes LOW... I am assuming a faulty Arduino but my Arduino seems to be working just fine as it runs other stuff (tested blink and reading an Ultrasonic sensor) just fine.

My deadline is 2 hours from now...

EDIT: Here's the complete void loop function... Note the two pins on top which go HIGH? They Never go LOW again in the entire code.

Answer 1

Your code sets it high, delays for 1000ms, sets it low, and then... turns around and sets it high almost immediately after. Try delaying in between.

Answer 2

  digitalWrite(IN2Left, HIGH);
  delay(1000);
  digitalWrite(IN2Left, LOW);

It would go LOW for a few microseconds. Maybe put a delay after going LOW?