How to Use the L293D Motor Driver – Arduino Tutorial

The L293D is a 16-pin Motor Driver IC which can control a set of two DC motors simultaneously in any direction. The L293D is designed to provide bidirectional drive currents of up to 600 mA (per channel) at voltages from 4.5 V to 36 V (at pin 8!). You can use it to control small dc motors – toy motors. Sometimes it can be extremely hot.

In this tutorial you will learn how to use it with Arduino uno to control two dc motors.

 

 

Components :

• Arduino Uno
• Breadboard
• L293D Motor Driver IC
• Jumper wires

 

Connections:

 

 

• PIN 1 – connect to an Arduino digital pin 6
• PIN 2 – connect to an Arduino digital pin 5
• PIN 3 – connect to DC motor one pin
• PIN 5 – connect to an Arduino GND
• PIN 6 – connect to DC motor another pin
• PIN 7 – connect to an Arduino digital pin 4
• PIN 8 – connect to an Arduino 5V
• PIN 16 – connect to an Arduino 5V

 

Example Code:

 

void setup() {
    pinMode(4,OUTPUT);
    pinMode(5,OUTPUT);
    pinMode(6,OUTPUT);
    digitalWrite(4,HIGH);
}

void loop() {
    // motor rotate left to right direction
    digitalWrite(5,HIGH);
    digitalWrite(6,LOW);
    delay(5000);

    // motor right to left direction 
    digitalWrite(6,HIGH);
    digitalWrite(5,LOW);
    delay(5000);
}