Arguably the one piece of the iPod that really makes it stand out is its Click Wheel. In particular, the ability to rub one’s finger around it to scroll through menus and adjust volume. Have you ever wondered how it worked? Wonder no more.
You gotta love Howstuffworks.com. They even tested to see that you can use an orange. I can’t do the explanation justice, but I will say one word: capacitance.
[via del.icio.us]
