L293 Optically Isolated Dual Motor Driver 1A

This L293 based motor driver features an optically isolated interface to provide electromagnetic interference protection.

The L293 dual h-bridge motor driver can drive two 4.5-36V motors at 600mA of continuous current with 1.2A peak output per channel. This motor driver uses photocouplers to optically isolate your delicate microcontroller from the motor driver circuitry. It supports both 3.3V and 5V logic level microcontrollers.

Screw terminals are provided for connection to two motors and a motor power source. Digital inputs are available via male header pins.

Optically isolated motor driver input pins

Pin	Description
IN1	L293 Input 1 - Motor B control 1
IN2	L293 Input 2 - Motor B control 2
IN3	L293 Input 3 - Motor A control 1
IN4	L293 Input 4 - Motor A control 2
EN1	EN1 - L293 Enable 1 - Motor B enable
EN2	EN2 - L293 Enable 2 - Motor A enable
VCC	Logic level voltage in (3.3-5V)
GND	Common ground

 

L293 motor driver truth table

EN1/2	IN1/3	IN2/4	Description
H	L	H	Forward
H	H	L	Backward
H	L	L	Stop
H	H	H	Stop
L	X	X	Stop

 

 

Normally you would control the direction of the motor using IN1/3 & IN2/4 and the speed by varying a PWM signal on the EN1/2 lines.

 

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