L293D Motor Driver Guide

What Is the L293D Motor Driver?

The L293D is a popular H-bridge motor driver IC that allows you to control the speed and direction of up to two DC motors simultaneously.

Pinout of the L293D

• Enable Pins: EN1 and EN2 (Enable motor channels)
• Input Pins: IN1–IN4 (Control motor direction)
• Output Pins: OUT1–OUT4 (Connect motors)
• VCC1: Logic voltage (5V)
• VCC2: Motor voltage (5V–36V)

Arduino Example Code

#define EN1 9
#define IN1 8
#define IN2 7

void setup() {
    pinMode(EN1, OUTPUT);
    pinMode(IN1, OUTPUT);
    pinMode(IN2, OUTPUT);
}

void loop() {
    digitalWrite(IN1, HIGH);
    digitalWrite(IN2, LOW);
    analogWrite(EN1, 128);
    delay(2000);

    digitalWrite(IN1, LOW);
    digitalWrite(IN2, HIGH);
    analogWrite(EN1, 128);
    delay(2000);
}