YouTube user magx1 builds a lot of home-made gas lasers, running electric current through sealed tubes filled with various gases. When you do that, you get the gas atoms all riled up and their electrons absorb energy. Eventually, that energy gets released in the form of directional, highly focused light—a laser. There's a bit more to it than that, but you've got the idea.
One type of laser magx1 builds is called a carbon dioxide laser, though it actually contains a mixture of carbon dioxide, nitrogen, hydrogen and helium. In this video, the carbon dioxide in the mix is coming from his own breath.
By exhaling into my 'supply' balloon, I was able to get pretty good results considering! Unlike a 'proper' laser mix of CO2, N2, and He; the 'breath' trick appears to have a much narrower pressure range over which lasing will occur. But I like it anyway - it doesn't get much more DIY than this!
After years of speculation and wrangling over his remains, Kennewick Man turns out to be closely related to contemporary, local Native Americans after all. Discovered near Kennewick, Wash., in 1996, the skeleton ended up in a tug of war between tribes in the pacific northwest who wanted to bury the remains, and scientists who wanted […]
The European Organization for Nuclear Research, or CERN, has been releasing portions of its research to the public for years. This week’s massive 300 terabyte dump of Large Hadron Collider (LHC) data is the biggest yet by a long shot — and it’s all out there, open source, free for the exploration.
You may not love Microsoft Word, but you’ve definitely used it. Other than being one of the most ubiquitous programs on the planet, it’s been the go-to word processing system for more than a quarter-century because it’s as basic as it gets. But occasionally, you’ve got assignments that beg for a lot more options than simple […]
Almost everyone has their smartphone in a case of one kind or another. Beyond simple protection, finding a case that can charge your phone on its own, but doesn’t feel like it’s also adding a couple pounds to the phone’s weight is the tricky part. Billed as the world’s thinnest battery case, the ThinCharge iPhone […]
You never know when new projects, ideas or opportunities can drop into your lap at a moment’s notice. That may require you to learn a new programming language like Python. Or maybe you need a primer on 3D game development. Or you might realize you could use a serious brush-up on iOS mobile creation.Point is, […]