Many people are unaware of the powerful bluetooth capabilities possessed by Arduino. What better way to learn than by modifying an existing remote control car so that you can control it using your smartphone over bluetooth! At a basic level this project works using a H-Bridge motor controller to enable the Arduino to have control over the remote control car's motors. A bluetooth module allows the Arduino to receive messages from an Android phone over bluetooth which can be used to control the car. Very cool!
To get started learning how to control your own remote control car using your smartphone check out the following instructions prepared by Herbaltea.
If you are looking for a bluetooth module to work on this project why not check out the Freetronics Bluetooth Shield?
Our Bluetooth Shield plugs right in to your Arduino and lets you send and receive data and commands from your sketches. You don't even need to do anything fancy in your sketches, because the Bluetooth link acts as a serial port: you just pair it with your computer, then you can simply use "Serial.read()" and "Serial.write()" as normal! The Bluetooth Sheild can operate as a Bluetooth master or slave and is packed full of useful features. To find out more check out the Freetronics Bluetooth Shield product page.