[Boris Landoni] put together a guide to using an inexpensive 3-axis accelerometer with Arduino. The chip that he chose for the exercise is an MMA7455L made by Freescale. It’s got a lot of nice ...

and an accelerometer. The nunchuck is meant to plug into a Wii controller and the connection is I 2 C, so that’s trivial to interface to an Arduino or other small microcontroller. The only issue ...

With it, via I2C, I could add an Arduino Pro Mini, and an I2C Oled Display and make a watch capable of having all this information, plus a pedometer (by analysing accelerometer data). Cool enough ...