Hey guys, I am a teaching assistant for an introduction to engineering class for biomedical engineering majors at Vanderbilt University this semester. I created this video to explain analog-to-digital conversion to them because time ran out during class and I did not get to this point in the lecture. I ran across the Teach It! Instructables contest and thought if I already had the video created, why not enter it into the contest, so here goes.
The video gives a simple introduction to analog-to-digital conversion and then explains how this relates to reading data from an accelerometer using an Arduino. For those of you who do not know, as the name suggests, an accelerometer measures the gravitational pull on the device. This particularly accelerometer measures acceleration in the x, y, and z axes. The accelerometer I am using in the demo is the MMA7361 and the datasheet can be found online. The datasheet will give more in-depth info of the accelerometer itself. If you search "MMA7361 filetype:pdf" in Google, it should pop right up. It is also attached in this Instructable. If you are not used to reading datasheets, it may be a little intimidating. Please feel free to ask if you have any questions. Additionally, the accelerometer module that I am using was purchased on Amazon from Virtuabotix, if you are interested. Anyways, here's my video. The video itself is self-sufficient, but I highlighted the major parts of it in steps if you want a quick summary. I hope you learn something from it. And if you have any questions, please feel free to ask.
If you like my Instructable, please consider voting for it in the Instructables Teach It! Contest.