I've built some LED lights. Mostly because I'm a geek. I built a red LED headlamp and created a complete set of instructions for anyone interested in duplicating it. It isn't actually a useful headlamp, but if you are into building electronic things you might find it interesting.

This is something I wrote about water purificaton that people often ask me to resend.

Ultralight backpacking is important to me... mostly so I can carry an additional 30 pounds of climbing gear to remote locations. Got my pack weight, not counting food and water, to under 10 pounds for three season travel. Though comfort suffered. Mostly in terms of the pack and sleeping pad. I prefer a 3" thick Big Agnes mattress and a pack with a decent suspension. My ultralight pack was the GVP G4. While I no longer use it, I still do think highly of it. This is a review of the GVP G4 that I wrote for a friend.

One thing about being an ultralight zealot... you weigh all your gear. And if you think I'm a freak for collecting this information and making it available on the web, just think what a freak you are for looking at it.