3 entrades analògiques
https://github.com/jeroendoggen/Arduino-MMA7361-library
http://www.geeetech.com/wiki/index.php/MMA7361_Triple_Axis_Accelerometer_Breakout
7 €
http://eud.dx.com/product/geeetech-mma7361-triple-axis-accelerometer-breakout-for-arduino-red-844367950