Picture of Dual H-Bridge - L298 Breakout Board - Homemade
This is my homemade Dual H-Bridge using the IC L298N.

For control DC motors or step Motors ao other purposes just like you need.

Others projects:


Step 1: Hardware and Materials

Picture of Hardware and Materials

1 x perf  board 13x26 holes (3,5 x 7,0 cm)
2 x AK300/3 connector
1 x 8 Header female connector for Arduino
1 x L298N (Multiwatt15)
8 x 1N4001 Diode
2 x 100nF capacitor
2 x 0,47Ohm x 1W Resistor
Wire (green and blue colors)



If i have a dc motor 24v,do i have to change something or that circuit will work with my motor too?


gorthan7 months ago

Hello, I have some resistance from 0.47 ohm 0.5W, ceramic capacitors 104Z LK and 1N4007 diodes. They go well? I need 2A output but I have to connect a single port and the power supply from 7.3 V


Gorthan :)

RPihacker10 months ago

Hi BigDog1971 - excellent job with the H-bridge! Impressive presentation, you clearly worked hard to to share your work in a way people can understand and learn from.

My question is do you know of a micro-controller chip that can be added to the H-bridge motor driver board to provide PWM to control the L298N and take commands from a Raspberry Pi B+.

I am trying to build a Raspberry Pi robot from scratch, meaning the chassis and all support circuits, such as a motor control via an H-bridge are build from plans on perf-board instead of purchased.

So far I have been unable to identify a through the hole mirco-controller that can interface with the Raspberry Pi and provide PWM to the L298N.

Do you have any ideas or recommendations?

Thank you.

PaulG3 RPihacker9 months ago

Strong recommendation for the Cypress Semiconductor PSoC4 processor. It can output PWM using pure hardware and has a 32bit ARM processor on the same chip. The development boards are $4.

BIGDOG1971 (author)  RPihacker10 months ago

I am so sorry but I do not work with RaspBerry Pi and I do not know how to interconnect with arduino uno neither to the Dual H-Bridge.
So I cannot help you in this matter.


mykiscool1 year ago

If you aren't doing this for the fun of building, this one is definetely worth buying premade since it is only like $2.00 on ebay if you do a search for lm298n dual h-bridge.

BIGDOG1971 (author)  mykiscool1 year ago
No, I am not doing this for sale, just for fun and to know how it works.



Can you please tell me what is the purpose of diodes. I tried using it with

a 1 Amp. DC motor it works fine initially but fails after couple of days.

I was wondering if its to do with diodes. Should I use diodes with higher


Hudaib11 months ago

i am getting only 0.5 volt on all the output pins.. why its happening? i also changed my l298n to make sure the chip is fine. i am not using the capacitors. any suggestion. thanks in advance

BIGDOG1971 (author)  Hudaib11 months ago
Are you using the external 12V power source?
Check the "sense" pins connections, they must be connected to ground directly or via 0.5Ohm x 2W resistor.
The ground must be common for both +5V and +12V power source.
The capacitors are just for DC voltage decoupling.

This kind of issue is so difficult to check this problem remotely.

I hope I have helped you.

Feel free to send me your questions.

Marcelo Moraes
NickM21 year ago

can u create to me coding to control 2 motor, 1 motor left right and 1 motor forward backward i want use to h-bridge driver pls reply to my email nickmuzill@yahoo.com

ishan5531 year ago

and can u plz send me the video of how to use them if ur free or plz instruct me because im just 12 years old and what about the other tamiya items

and sorry if i am bothering u

BIGDOG1971 (author)  ishan5531 year ago
Hi Ishan,
Send me an email requesting the code and libraries.
You are not bothering me. Feel free to send me your questions.



Marcelo Moraes
ishan5531 year ago

anks for the answer sir

ishan5531 year ago

hello i want to ask u if there is any other option for all the tamiya products mainly the gear box in the mobile controll arduino rover(fast and agile )

the instructor is busy so lz can u answer

BIGDOG1971 (author)  ishan5531 year ago
I used to using the "Uniaxial Motor Gear Motor DC3V-6V For Smart Car Chassis". You can bought it from ebay.


I recommend this: (ratio 1:220)


sama121 year ago

Will this circuit work for pololu 250:1 motor? and if yes what should be value of the sense resistor with pololu motor.

BIGDOG1971 (author)  sama121 year ago
Sorry Sama

I did not work with this pololu 250:1 motor.
I cannot help you in this case.

But I think yes, it will work
The "sense" resistor must be always 0,47Ohm or short-circuit.
BIGDOG1971 (author) 2 years ago
Hi Javi,

You are right, this H-dual bridge can control 2 DC motors or a 4 pin step motor.

In the instructables above you can found how to work with the H-bridge or in my blog too.

This website is in Portuguese.

If you have a more specific doubt, please send me I will be glad to help you.


Javi Roces2 years ago
hello! nice work, i think that this is what i was searching for :) but, i miss some pics on how to connect your hbridge and arduinouno, and maybe some other examples of using this little shield :) (both dc motor or step motor -4 pin, i suposse-. Thanks!!
vj012 years ago

i Love this project but im having a bit of a issue i tried to develop this on a pcb using the eagle cad avaliable but for some reason it is still not working for me i followed it exactly ive triple checked everything comparing the schematic but still nothing plz can you help me

thank you
BIGDOG1971 (author)  vj012 years ago
Hi vj01

Sure that I can help you, send me an email with your PCB and I can check it.
I also have a PCB version and I can share it with you.

-Standby2 years ago
Thanks for the reply i make the schematic on Isis with L293D they are very similar to 298N except the power.

BIGDOG1971 (author)  -Standby2 years ago
I saw your schematic. Great job. This is very useful and I think that is works properly.
Thanks a lot for your contribution.
-Standby2 years ago
Hello, as a student in electronics i will give you one tip for saving more pins on your AVR, use an 74LS04 logic inverter on inputs : when in1 is High in2 is Low and vice versa.
If i have some time i will send you the schematic.
BIGDOG1971 (author)  -Standby2 years ago
Hello, Your comment is very useful. I understand the concept of saving pins using an 74LS04 logic inverter on the input pins.
I am grateful for your comments and gets the hint to everyone; when necessary and when the circuit permits, use the 74LS04 to save pins on the Arduino or other micro-controller.

Send me the schematic when you have some time. If you find it convenient, create an instructable for this tip.


navanod2 years ago
OK I built this beast today though I would need some help actually wiring up to arduino. Is there any chance someone could give some more details on that side?
BIGDOG1971 (author)  navanod2 years ago
Hi Navanod,

Tell me about what exactly do you want to do. What kind of application you need.

As you saw in the "Bluetooth Bot" example, you must wire the dual H-bridge and Arduino as below.
int inA1 = 10; // Pins from H-Brdige to Arduino
int inA2 = 11;
int inB1 = 5;
int inB2 = 6;

This example is to control two motor in any direction and any speed. In the function "void set_motors(int left_speed, int right_speed)":
DC_motor-A is the right motor;
DC_motor-B is the left motor;

(0,0) - means that both DC_motors will be stopped
(255,0) - means that the DC_motor-B will have maximum speed and DC_motor-A will be stopped (motor B will be running in clockwise direction, for example)
(-255,0) - means that the DC_motor-B will have maximum speed and DC_motor-A will be stopped (motor B will be running in counter clockwise direction, for example)
(0,255) - means that the DC_motor-A will have maximum speed and DC_motor-B will be stopped (moto A will be running in clockwise direction, for example)
(0,-255) - means that the DC_motor-A will have maximum speed and DC_motor-B will be stopped (motor A will be running in counter clockwise direction, for example)

I hope this explanation had helped you.

If you have more doubts about this matter, send an email directly.

Best Regards

BIGDOG1971 (author)  BIGDOG19712 years ago

You must put the "enable" pin A and B (of the H-Bridge) to the logical 5V, in order to allow the motors runs.