L293D Dual H-Bridge Motor Driver

L293D is a dual H-Bridge motor driver, So with one IC we can interface two DC motors which can be controlled in both clockwise and counter clockwise direction and if you have motor with fix direction of motion the you can make use of all the four I/Os to connect up to four DC motors. L293D has output current of 600mA and peak output current of 1.2A per channel. Moreover for protection of circuit from back EMF ouput diodes are included within the IC. The output supply (VCC2) has a wide range from 4.5V to 36V, which has made L293D a best choice for DC motor driver.

A simple schematic for interfacing a DC motor using L293D is shown below.

L293D H-Bridge driver

As you can see in the circuit, three pins are needed for interfacing a DC motor (A, B, Enable). If you want the o/p to be enabled completely then you can connect Enable to VCC and only 2 pins needed from controller to make the motor work.

As per the truth mentioned in the image above its fairly simple to program the microcontroller. Its also clear from the truth table of BJT circuit and L293D the programming will be same for both of them, just keeping in mind the allowed combinations of A and B. We will discuss about programming in C as well as assembly for running motor with the help of a microcontroller.

Conversation

Tue Aug 19 2014, 04:51 PM
allen ndumu
please i will like to know if the problem of speed control of dc motor using keypad and l298 was if yes can i have the complete project send it to the address i really need to see it
Tue Aug 19 2014, 10:47 AM
Amit Bisht
sir i want to have some trending projects on which i could work related to ATmega 16 microcontroller
ExperimenterUK
Sat Aug 16 2014, 04:16 PM
@diligent . create a thread
Sat Aug 16 2014, 03:17 PM
diligent
in assembly langauage programming..
Sat Aug 16 2014, 03:14 PM
diligent
will anyone help me?
Thu Aug 14 2014, 10:24 PM
Amirudin Tone
i help, i need liberary IC 4047 in the proteus. thanks
ExperimenterUK
Thu Aug 14 2014, 03:59 PM
@NARAYANA are you getting an error ?
Tue Aug 12 2014, 11:47 PM
NARAYANA
i am not able to get reg please provide me registration link
Tue Aug 12 2014, 10:32 AM
saloni
sir I was needing literature survey of''ANDROID CONTROLLED SPY ROBOT USING MICROCONTROLLER"
ajay_bhargav
Mon Aug 11 2014, 12:30 PM
@nisargpatel and @NARAYANA please post questions in forum.

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Comments

samchovatiya
Thu Aug 21 2014, 02:30 PM
hasmukhjain
Wed Aug 20 2014, 06:28 AM
rablo
Tue Aug 19 2014, 10:10 AM
faizhameed
Tue Aug 12 2014, 10:39 PM
ind3siszive
Sun Aug 10 2014, 01:05 PM
snaxxx68
Sat Aug 09 2014, 11:06 AM
[email protected]
Sat Aug 09 2014, 08:58 AM
rajiabdul
Mon Aug 04 2014, 01:31 PM

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gaurav7577 Avatar
Posted By gaurav7577
Fri Aug 22 2014, 01:30 AM
thnks for rply..i hav attached error pic here...pl...
ajay_bhargav Avatar
Posted By ajay_bhargav
Fri Aug 22 2014, 12:46 AM
It is clearly mention with segment name on the pin...
ajay_bhargav Avatar
Posted By ajay_bhargav
Fri Aug 22 2014, 12:42 AM
What is the error that you're getting?
samchovatiya Avatar
Posted By samchovatiya
Thu Aug 21 2014, 02:57 PM
I want to know that in my project of Simple Digita...
gaurav7577 Avatar
Posted By gaurav7577
Thu Aug 21 2014, 05:47 AM
Hi..I hav lpc 2148 dev board from nex Robotics. I ...
hasmukhjain Avatar
Posted By hasmukhjain
Thu Aug 21 2014, 01:50 AM
for that try to add a variable wch can save your p...
jayachandra Avatar
Posted By jayachandra
Wed Aug 20 2014, 08:11 AM
thanq for reply @hasmukhjain,actually my applicati...
hasmukhjain Avatar
Posted By hasmukhjain
Wed Aug 20 2014, 06:40 AM
Hi Mr jayachandra,I feel ur if statement for switc...
nisargpatel Avatar
Posted By nisargpatel
Wed Aug 20 2014, 01:29 AM
see we are measuring electrical parameters by CT, ...
jayachandra Avatar
Posted By jayachandra
Tue Aug 19 2014, 08:22 AM
HELLOim facing problem with eeprom, i wrote a prog...