loading
Picture of Control your motors with L293D and Arduino
After long research and trial and error, I have came up to a new walkthrough regarding this nice chip, the L293D.

Each project is one project and each one has its own unique power configurations, so you must be aware of the best battery choice and how to distribute voltage through your robot.

I strongly advice you to read the following articles:

Picking Batteries for your Robot
Once you've decided on batteries, how do you regulate the voltage

************************************************

L293D gives you the possibility to control two motors in both directions - datasheet

Step 1: Basic implementation

Picture of Basic implementation
3262168342_ae12307934.jpg
This is the most basic implementation of the chip.

As you can see, a 5V Voltage Regulator is between the battery and pins 1, 9, 16.

Pin 8 gets power before the VReg, if your motor needs for example 6V you should put 6V directly in this pin, all the other pins should not get more than 5V.

This will work with no problem at all, but if you want to do the right implementation take a look at the next example:
 
1-40 of 106Next »
Iqbal Samin1 month ago
Nice instructables. Can i use regulated 5 volt from arduino instead of 7805?

I don't think so. Arduino board can not supply current to run a motor. You need an external supply.

MCU output? What does MCU stand for? Thanks.

MCU is the Microcontroller

Thank you!

TarekT22 months ago

Hey ,

I have one qst , can i use this H Bridge with a Linear acutator (Motor) , who needs 24 V, if yeah , did i just need to feed pin 8 with 24 V source ?

Thanks

Yes. The datasheet says that the l293d has a maximum input current of 36 volts i Think. You should only supply this to pin 8 however.
Kristian1231 month ago
Hi. Great tutorial. There is one thing i do not understand though, probably because im not an electrical engineer: why Are the 100 uf capacitors needed?

Best
Kristian
Iqbal Samin1 month ago
Nice instructables. Can i use regulated 5 volt from arduino instead of 7805?
Iqbal Samin1 month ago
Nice instructables. Can i use regulated 5 volt from arduino instead of 7805?
HemilP1 month ago

why you have connected 0.1uf capacitors in L293D connection?

guibot (author)  HemilP1 month ago
I think it was in the L293D datasheet

¿Cuáles son los materiales?

aditya jindal2 months ago

My L293D chip is getting heating up and after a few seconds the motors are stopping. please help.

I think your motor is drawing too much current. The max continuous current output of L293D is 600mA(Refer the data sheet). L293 has thermal shutdown protection that automatically shut off motor outputs when over heat. Use 298N that can allow 2A continuously. What motor you are driving with this IC?

I am using small ordinary 6v motors which come in the cheap rc cars.
mgarg51 year ago
Sir just 2 questions, Can i use this setup for a robotic arm. I have 2 L293D chips i need to inetrface. Is it posible? If yes then how? & also can i use Dc motors with just power and ground for this setup instead of a motor with a feedback?
AdithyaA2 mgarg52 months ago

i think you can. but it my be a bit difvult

AdithyaA22 months ago

i luv drones

alys52 months ago

can I connect 3 of these setups with 3 l293d on the arduino uno rev3 but will I have enough pins beacause I am connecting a nrf24l0 on the same arduino I need 3 l293d to work on so will there be enough pins for this

tysweat2 months ago

If you want simpler code, I wrote an Arduino library for the L293D motor controller. You can find it at https://github.com/tysweat/arduino-L293D

how can I control 4 motors

Use 2 L293D chips

thanks tys5
davast2 months ago
Hello
Can this driver used in line follower
alee753 months ago

Thanks for making this. I'm totally new to this, but it will give me a good place to start. It worked well .

guibot (author)  alee753 months ago

Hi! I'm glad to know it worked for you!! ;)

aditya jindal3 months ago
Great project! I have made it and it is working properly but I want to control motor speed also with arduino. How can I do it
guibot (author)  aditya jindal3 months ago

Hi! if you want to control speed you should use analogWrite(pin, value), where value is a number between 0 and 255.

for mor info check the PWM tutorial on the Arduino page:
http://www.arduino.cc/en/Tutorial/PWM

kamhagh4 months ago

my motors don't move when on the ground, i found out its giving 3.3v for 2 motors connected and 5v for 1 motor, im using 4 AA batteries, it works when connected directly, my motors draw 600MAX when moving hardly! 300mah normally!

what should i do? i already ordered a 2200mah 3s (11.1v) battery hopping it woul work!

great tuts here is another tuts

sagund9 months ago

hello there...i am building a robot using arduino and L293D.....and i want to use bluetooth module on the same to control the robot using android app...i wonder if you could help me with the codes to be written on the arduino....thankyou :))

https://alselectro.wordpress.com/2014/10/21/bluetooth-hc05-how-to-pair-two-modules/

It didn't work at all!!!!

Any tips?????

guibot (author)  Haythem Kenway7 months ago

more details please..

yhdesai7 months ago

make it a shield

DanM511 months ago

Thanks for the post. I made this circuit and it worked well. The photo was taken before I found the error on only hooking the unregulated power to one pin.

robot-v1.JPG
JenniferR4 DanM59 months ago

Hello,

Do you have a code for that car? I have the same exact one.

skadd4life1 year ago

Hello!
I want to use a 5v motor, and use a 5v DC powersource (not battery, wall plug). Do I still need to regulate my voltage? Can my 5V source be used for Vs pin of the L293D and microcontroller Vcc? Or, do I somehow need to isolate the 5v between those inputs? Thanks!

BTW, I plan to use ATtiny to provide PWM to L293D.

1-40 of 106Next »