A-Bog’s got a writeup of code he grabbed from the sparkfun forums to get the arduino to talk to their compass. – Link

Sparkfun’s compass is cute, but a tad spendy. – Link

Hoeken had mentioned a $15 dollar digital compass and I found the link to get the compass, I bought one! – Link

Here’s a little circuit to play with it. – Link

I found this cool site with lots of Wii and Atmel AVR controller hacks called Wind Meadow. There isn’t really much info on who runs it, other than some posts by ‘Chad’, but there are some great tutorials. Out of all the great hacks and projects worth looking at is definitely the ‘Wiimote Controlled Firefighting Robot’. ‘Chad’, also has a great tutorial (code included) showing you how to hookup a Wiimote to a microcontroller. If you’re wondering why there is so much interest in doing this vs just buying an accelerometer, it’s because the Wiimote costs $39 and there are lots of goodies inside including a 3 axis accelerometer which is $40 alone from most electronics sites. Anyway, check out the site when you have a chance.

http://www.windmeadow.com/

These guys made a punching bag out of homemade sensors. They took pieces of wire mesh and soldered them together with some foam in between to create pressure sensitive foam. It’s all hooked up to the Arduino in a matrix and they were nice enough to post the code, tutorials and Processing files needed to recreate this project. I don’t think I have the need, or the space for that matter, to build a pressure sensitive punching bag, but I could definitely use a concept like this on some wearable clothing hooked up to a LilyPad.

http://www.fluidforms.at/de/CassiusHow.php

Drat! I’m not at home with my stack of electronics catalogues, how am I going to order that electronics part I need? Once I get it, wouldn’t it also be great to have a datashet and can I get that on my iPhone right now?

In steps Octopart, the electonics part search engine. Go try it. It’s a beautiful thing. – Link