Arduino Bluetooth RC Car ( Arduino Phone Controlled)

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

Step 1: What You Need?

1 x Arduino UNO 

1 x USB Type-B Cable

1 x L293D Motor Driver
1 x HC-06 Bluetooth Module 
1 x RC Car that can fit all components 

1 x Computer with Arduino IDE installed
1 x Mini Breadboard 
Male-to-Male Jumper Wires 
Female-to-Male Jumper Wires


Power: 
4 x 1.5V AA Battery  or 
1 x LiOn Rechargeable Battery ( I used an 12V LiOn rechargeable battery)
1 x 4xAA Battery Holder (for AA battery)

Optional
1M Ohm Resistor & 100k Ohm Resistor (for Battery Level) 
4 x LEDs (for light) 
1 x Speaker / Buzzer (for horn sound)
4WD 2 Layer Smart Car Robot Chassis Kit Base Set
Arduino 7.4v 1500mAH 18650 Li-ion Rechargeable Battery

11.1V 3S 2200mAH 30C Rechargeable LiPo Battery

2s&3s Cells High Ampere Lithium Polymer LiPo Li-ion E3 Balance Charger

Soldering Iron & Solder Lead 
Cable Cover
Arduino Compatible UNO Ultimate Starter Kit / Learning Kit
USB To Power Jack Cable

Don't have components? Don't worry. Just click the component's name. 

Step 2: Remove The Existing RC Circuit.

Before starting, remove the existing rc circuit.

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 3: Build Your Circuit.

Ι suggest you to build your circuit on Mini breadboard first.

You can use on/off switch of car like this:
Battery +........./ .......... Arduino Vin

Tip

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 4: Upload Code To Board.

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!

Step 5: Android Bluetooth Controller.

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

Ardumotibebt_v2.1.apk

Tip

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 6: Test Your Android Bluetooth RC Car. 

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.

Source: http://www.instructables.com/id/Arduino-Bluetooth-RC-Car-Android-Controlled/?ALLSTEPS

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Author & Editor

My Robot Education Sdn. Bhd. (Robotedu.my) was founded in 2015 as the first robotics education centre in Malaysia to provide Arduino-based robotics courses for youths. Our vision is to be able to provide robotics education to every youth in Malaysia.