If you are the original author, please access your User Control Panel and update it.
I decided to throw this together simply because I wanted something faster than the tamiya treaded chassis I had previously finished. See that link for schematic and code as this project is very similar. Main difference is this used a different H-bridge.
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/phone-controlled-rc-car