A while back, I inherited a surgical lamp from a decommissioned hospital in Mt. Vernon. While astoundingly awesome in its light throwing and ambiance-enhancing abilities, it weighs about 150lbs. An

Matt Westervelt (Metrix:CreateSpace), Willow Brugh (Jigsaw Renaissance), and Eric McNeill (Seattle Dorkbot) had a discussion about hacker spaces on KUOW. I find it interesting that it’s 2010 and the m

Rawrbot is HBL’s “official” mascot. Here is a vector drawing I made, based on a whiteboard sketch a bunch of us worked on last year. (PDF)

Power, Volts, Current, Resistance. There are a bunch of charts floating around that describe the relationships between these four variables. I didn’t like any of them, so I decided to make my own. (PD

I made a basic singing arc, based on this Instructable. It uses a TL494 to switch a MOSFET very rapidly, dumping current into the primary coil of a TV flyback. The air rapidly heats up when the spa