This document presents information about the L293D motor driver integrated circuit. It includes sections on what an L293D is, describing it as an IC that can control two DC motors simultaneously. It also covers the pin descriptions of the L293D, its circuit diagram, working procedures including how it enables motor direction, a description of an H-bridge circuit, and applications of the L293D such as in robots.

1. Presentation Topic :- Motor Driver IC
(L293D)
Submitted By :
Suraj Kumar Saini (2015KUEC2015)
Naresh Biloniya (2015KUEC2018)
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Submitted To :
Dr. Sangeeta Singh
Dr. Vinita Tiwari

2. Table of content
 What is L293D ?
 Pin description of L293D
 Circuit diagram of L293D
 Working procedures
 Description of H-Bridge
 Application of L293D
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3. What is L293D ?
 L293D is a Motor driver integrated circuit which is used to
drive DC motors rotating in either direction.
 It is a 16-pin IC which can control a set of two DC motors
simultaneously. It means that we can control two DC motor
with a single L293D IC.
 Dual H-bridge Motor Driver integrated circuit. The L293D
uses 5V for its own power and external power source is needed
to drive the motors, which can be up to 36V and draw up to
600mA.
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4. Pin description of L293D
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5. Circuit diagram of L293D
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6. Working procedures
 Drivers are enabled in pairs, with drivers 1 and 2 being enabled
by the Enable pin. When an enable input is high (logic 1 or +5V),
the associated drivers are enabled and their outputs are active and
in phase with their inputs.
 When the enable pin is low, the output is neither high nor
low(disconnected), irrespective of the input.
 Direction of the motor is controlled by asserting one of the inputs
to motor to be high (logic 1) and the other to be low (logic 0).
 To move the motor in opposite direction just interchange the
logic applied to the two inputs of the motors.
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7. Description of H-Bridge
 It is an electronic circuit which enables a voltage to be
applied across a load in either direction.
 It allows a circuit full control over a standard electric DC
motor. That is, with an H-bridge, a microcontroller, logic chip,
or remote control can electronically command the motor to go
forward, reverse, brake, and coast.
 The term "H-bridge" is derived from the typical graphical
representation of such a circuit, which is built with four
switches like mechanical.
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8. Continue ….
S1 S2 S3 S4 Result
1 0 0 1 Motor rotates in onedirection
0 1 1 0 Motor rotates in oppositedirection
0 0 0 0 Motor free runs(coasts)
0 1 0 1 Motor brakes
1 0 1 0 Motor brakes
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9. Application of L293D
 It can be easily used to control the motor, so we can easily
control robot.
 In commercial robot
 Gesture control robot
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10. References
 https://www.rakeshmondal.info/L293D-Motor-DriverIt can be
used in commercial robot.
 https://en.wikipedia.org/wiki/H_bridge
 https://www.google.co.in/search?q=h+bridges&source=lnms&t
bm=isch&sa=X&ved=0ahUKEwiW1MHFrvvZAhUJbo8KHQ
0JCN0Q_AUICigB&biw=1366&bih=662#imgrc=_kxe4W4OZ
NWrdM:
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