http://www.cs.unca.edu/~bruce/Fall13/360/IMU_Wk8.pptx

Find old I2C notes

3.3v arduino
volage i2c devices

Is ADXL345 5 volt?

https://www.adafruit.com/product/1231	ADXL345
https://www.adafruit.com/product/1714	9-DOF

https://www.sparkfun.com/products/12009	SparkFun Logic Level Converter - Bi-Directional
https://learn.sparkfun.com/tutorials/bi-directional-logic-level-converter-hookup-guide?_ga=2.136303729.1714031443.1517502057-974619672.1508699118	Bi-Directional Logic Level Converter Hookup Guide

http://howtomechatronics.com/tutorials/arduino/how-i2c-communication-works-and-how-to-use-it-with-arduino/	How I2C Communication Works and How To Use It with Arduino


https://www.arduino.cc/en/Reference/Wire	Wire Library
https://www.arduino.cc/en/Tutorial/MasterReader	Master Reader/Slave Sender




How to install libraries....
   https://www.arduino.cc/en/Guide/Libraries
       Sketch -> Include Library -> Manage Libraries
       Sketch -> Include Library -> add .ZIP library
       Sketch -> Include Library -> Contributed library
   https://learn.adafruit.com/adafruit-all-about-arduino-libraries-install-use/arduino-libraries