The document presents information on the Motor Driver IC L293D. It begins with an introduction of the topic and importance of topic presentations. It then provides details on the L293D including what it is, its pin descriptions, circuit diagram, working procedures, description of an H-bridge, and applications. The L293D is an integrated circuit used to control the direction and speed of two DC motors simultaneously up to 36V and 600mA. It works by using an H-bridge circuit configuration to allow controlling the direction of current and voltage applied to the motor. Applications mentioned include controlling robots.

1. Topic presentation on:- Motor Driver IC
(L293D)
Presented by:- Amit Kumar
(EEE/14/1103)
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2. Importance of topic presentation?
 The topic presentation improve my thinking and
knowledge skill on a particular point .
 By the topic presentation my communication skill
increase.
 By this section I research my work and knowledge level
and then full-fill for the further.
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3. Introduction
 What is L293D ?
 Pin description of L293D.
 Circuit diagram of L293D.
 Working procedures.
 Description of H-Bridge.
 Application of L293D.
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4. 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(IC). 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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5. Pin description of L293D
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6. Circuit diagram of L293D
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7. 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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8. 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.
 H-bridges are available as integrated circuits, or can be built
from discrete components.
 The term "H-bridge" is derived from the typical graphical
representation of such a circuit, which is built with four
switches, either solid-state (eg, L293/ L298) or mechanical (eg,
relays).
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9. Continue ….
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S1 S2 S3 S4 Result
1 0 0 1 Motor rotates in one direction
0 1 1 0 Motor rotates in opposite direction
0 0 0 0 Motor free runs (coasts)
0 1 0 1 Motor brakes
1 0 1 0 Motor brakes

10. Continue…..
 To power the motor, you turn on two switches that are
diagonally opposed.
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.

11. Application of L293D.
 It can be easily used to control the motor, so we can easily
control robot (manual robot).
 It can be used in commercial robot.
 Gesture control which is a emerging technology finds
many applications in various fields. The work we have
done is a little part of it. Controlling the motion of
wheeled robot through this system is not the only thing,
with further research we can take it too far.
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12. Any query?
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