Time to change IOIO and IOIO-Q board to Robot car by IOIO Robotic Activity board (IOIO-RAB) which 6 built-in DC motor driver, 1 Piezo speaker, 4 Servo connectors,and Battery pack connector.
This application for control IOIO robot car with dual side controller which easier to control than simple button. You can control the movement direction and speed easily.

Explain : This application use with IOIO or IOIO-Q board you can buy in www.inex.co.th
http://goo.gl/iSFHP

See more detail from www.tpemagazine.com on issue 37

Download source code from
http://goo.gl/Anr28b
or
https://github.com/akexorcist/IOIO-Bot/