my friend reported that his 3 axis accelerometer project is working on. He is using Microcontroller PIC16F887 for this circuit.
The direction-sensing is accomplished by Freescale’s MMA7361L, which is a three axis low-g micromachined accelerometer in a tiny (14 pin LGA) package.
The advantage of this chip is that it’s super simple to use:
just connect the three directional output pins to an analog-digital converter input of a microcontroller and you’re ready to go. With a few more pins connected straight to some further microcontroller IO pins you can enhance its operation with functions like SLEEP, 0g detection, sensitivity selection, etc.