Arduino Bluetooth RC Car (Android Controlled)




Introduction: Arduino Bluetooth RC Car (Android Controlled)

Hello, in this project I will show you how to transform an RC toy car to Bluetooth controlled through your Android smartphone!

Before starting, make sure that you have:

  • Arduino uno board
  • L293D motor driver
  • HC-06 Bluetooth module
  • RC Car that can fit all the above !

Optional you will need:

  • 1M & 100K resistor for battery level
  • 4x leds for lights
  • 1x speaker/buzzer for horn sound

For power, you can use the existing batteries (4x 1.5V AA), or replace them with a LiOn rechargeable battery pack.

(I used 12V LiOn rechargeable battery pack)

Official page:

Step 1: Remove the Existing Rc Circuit

Before starting, remove the existing rc circuit. You will not need it any more... you will make a better one from the beginning with Arduino uno ;)

Now, with one battery AA 1.5V you must find the polarity of 2 c motors.

  • For movement motor (back side) the positive polarity cable will be that moves the car forward.
  • For direction motor (front side) the positive polarity cable will be that moves the wheels left.

Step 2: Breadboard Schematic

Ι suggest you to build your circuit on (small) breadboard first.

You can use on/off switch of car like this:

Battery +........./ .......... Arduino Vin


If you have a "big" rc car it will need more power so you can use L298 module board. L293D motor driver will give max 0.5A per channel and it will be come very hot after while. L298 module board has a heat sink and can give 1A per channel, but is bigger than L293D.

Step 3: Code

Download and open file with Arduino ide. Read every line of code (+comments) to understand how it's working and then upload it to your Arduino uno board!

(for programming arduino uno board you must disconnect first the RX & TX pins of Bluetooth module)

Step 4: Android Bluetooth Controller

To control your new Bluetooth car, download and install this android application:


First enable Bluetooth and establish connection with BT module.
(ex. HC-06, password 1234)
Use "Help & info" button if you can not understand how it is working.

Accelelometer function is under developing, use with attention!

If you have problem with this app on your android device you can also use this one.

Step 5: Video of My BT ArduiCar

Video is in Greek language but I believe that you can understand it...

Thanks for watching!!!

Remember that Bluetooth technology will give you max 15-20 meters of control.

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184 Discussions


Can I use HC-05 bluetooth module instead of 06 and is there any AT mode settings in this project

Can i have the android apps code.

Can I use here 10000mah 5V powerbank instead of 12v LiOn battery; and instead of bluetooth module can I use wifi module instead? thanks!

My car ^_^


I was using this app for a while and now it sends only S on any button can you help me?

Why can't the android device control the car from where ever there is cell phone connectiong?

I m using L298N H bridge and i cannot figure out the the changes in circuit diagram and the code. Any help would be appreciated.

1 reply

Mano, fiz um projeto similar, talvez meu código possa lhe ajudar. segue meu git:

1. yo quiero hacer uno esaptamente igual me podrías ayudar

enviame el esquema y las conexiones

My motor not works, it's trill and stop. Why

Pls send this project pdf to

Can I use 9v rechargeable battery.pls reply fast

what is the code that i should write to control in the car speed by two motor only without motor driver?

thanks ^_^

By any chance would the code need changing in the case of rev3 arduino motorshield? Thank you :)

Hi. car working but motors are slow why? I Use 12v battery and l293D without leds. THANKS

1 reply

because u need a motor shield to control the speed motor

bro i want to add a ultrea sonic [distance sensoer] to the same code that is the car will stop automatically when objects come naear 2meters,plz pm me

2 replies

could you kindly send this also to me? i am also planning to add the ultrasonic sensor :) thank you, my email is