Aaron Parecki is the co-founder of Geoloqi.com, and specializes in backend systems development.
A lot of information about this device online is misleading. When I first heard about this, the site I was reading claimed the transmitter didn’t have a battery, and used the energy from the foot impact to power the burst transmission of the device’s ID. This is what got me excited about the device in the first place: that it was so simple.
Other places I’ve read say there is an... 
Project Description
We are creating an 8×8 matrix of RGB LED buttons. SparkFun sells a 4×4 button pad and circuit board for this. We’re going to connect four of those together to make an 8×8 grid. When you press a button, it will cycle through 8 colors: red, yellow, green, cyan, blue, purple, black and white.
It would be cool if you could save these images that you make, and then... 
I just got a Nike+iPod gadget thingy. It’s pretty cool, and stores all the running stats in xml files on the iPod, making for easy hacking of the running data. However, that’s not what I really want to do with it.
I got one of Sparkfun’s USB serial adapters for it, and can now get the raw data off of it. What I need to be able to detect is whether the sensor received an impact.
Before I...
