The LED series/parallel array wizard is a calculator that will help you design large arrays of LEDs. The LED calculator was great for single LEDs–but when you have several, the wizard will help you arrange them in a series or combined series/parallel configuration. The wizard determines the current limiting resistor value for each portion of the array and calculates power consumed. All you need to know are the specs of your LEDs and how many you’d like to use. Link.

This project consists of three circuit boards with a row of 32 LEDs on each (actually 64 LEDs because they’re double sided). The circuit boards are mounted radially in the spokes of a bicycle wheel and batteries near the hub supply power to them. The LEDs are controlled by a microcontroller that measures the rotational speed of the wheel by way of a hall effect (magnetic) sensor. As the wheel rotates, the microcontroller turns the individual LEDs on and off in such a way that a static image appears to float inside the wheel.

The 4 mechanical mirrors are made of various materials but share the same behavior and interaction; any person standing in front of one of these pieces is instantly reflected on its surface. The mechanical mirrors all have video cameras, motors and computers on board and produce a soothing sound as the viewer interacts with them. Thanks Kakkewiet! Link.

Simple 4 step design for recycling two old t-shirts into one handbag. The design on the site uses an old football jersey for a quick drying beach bag. Thanks Fishbone! Link.

“Taking things apart is just plain fun, but there’s also a lot to learn about how to build a foolproof Linux-based appliance. Break out your Torx drivers and take a closer look at TiVo’s inner Linux workings. Examining the TiVo system reveals how one company made the transition from desktop operating system to embedded system.” [via] Link.

This fellow originally started out wanting to build a microATX motherboard in an RC car, but when he couldn’t find a car that would fit it so he outfitted a cheap RC car from RadioShack with a modded WRT54G. Details, source, video, photos and more… Link.

You might recall the Elvis mosaic and the post-it lamp made from sticky notes, well- these folks are pushing the office art boundaries with a Richard Feynman Sticky note wall complete with sharpie accents. Link.