Randy Sarafan, who also happens to be the Technology Editor over on Instructables, gutted a remote-controlled car and swapped the parts for an Arduino board.

[Gilad] tipped us about his latest project, where he adds plenty of pneumatics and electronics into his wife’s car to remote control it. The brake/throttle pedals are actuated by pistons cont… ...

This iPad-controlled remote-controlled car provides fun for hours--but perhaps not for your kitty.

That Arduino controller is connected to a computer and the car waits for the app on the iPad or the Kinect waits to send input. Check out the video to see it in action.

They also can be fitted to remote controlled cars as [Indeterminate Design] shows with this electronic servo-operated active suspension system for his RC truck.

The system makes it feel as though you are sitting behind the wheel of the smaller remote control car and is powered by an Arduino Uno along with an IBT-2 H-Bridge to control the 24V motors.

A British man's jet-powered remote-controlled car broke a Guinness World Record for speed on its first attempt -- and exploded on its third.

The setup requires an Avatal 3117 remote start, an iPhone breakout board, an Arduino, a switching supply cell charger and a handful of transistors, resistors and diodes.

This video demonstrates how to set up a remote temperature monitoring system using an Arduino Uno R4 WiFi, an LM35 temperature sensor, and the MQTT protocol. The system captures ambient temperature ...

But if your car doesn't have a remote ignition, you can build your own remote start system that responds to a text message from an iPhone.