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.

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naqirizvi
Wed Jan 28 2015, 08:08 AM
the web theme is too much buggy and heavy , admin please change it to simple theme, so that user can browse quickly
naqirizvi
Wed Jan 28 2015, 08:07 AM
some one please share software name or ebooks related to avr
bhagyesh.bhavasar
Tue Jan 27 2015, 11:06 AM
i want to share my project but there is problem occurred during postng
bhagyesh.bhavasar
Tue Jan 27 2015, 05:58 AM
@ExperimentalUK i have used that purple button but same as previous it takes me to blank page
ExperimenterUK
Sun Jan 25 2015, 08:10 PM
This box is for chat. Post problems in a suitable forum
ExperimenterUK
Sun Jan 25 2015, 08:04 PM
@gaurav.k Use the purple "Post reply" button. Green buttons often present a fresh edit box.
ExperimenterUK
Sun Jan 25 2015, 07:33 PM
@avianash..we have no entry for avianash.. Are you sure that is your login name ?
Fri Jan 23 2015, 04:29 AM
lolokijuh
DJ Bakal tulungan mo ako s IC Tester
Fri Jan 23 2015, 04:29 AM
lolokijuh
sir help about IC Tester
Thu Jan 22 2015, 01:59 PM
apparao majji
could you please help in programming

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Karan123 Avatar
Posted By Karan123
Wed Jan 28 2015, 05:01 AM
Hello,I have changed schematic according to this c...
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Posted By naqirizvi
Tue Jan 27 2015, 07:10 PM
Have you done anything with devices like the ATme...
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I am using avr gcc compiler and avrstudio 4 .I am ...
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I have read that tutorial I am using AVR GCC Compi...
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dear sir, I was working on a project ...
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According to this page the output is fairly linear...
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dear sir, Now i want to generate a si...
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dear sir, Now its working properly. Th...
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