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$150, 12″ Swing, Metal Lathe, Mill, and Drill

The Lucien Yeomans “secret” that was almost lost. Your developing world school needs almost-free machine tools? Your developing world factory needs unavailable spare parts? You need a complex part that is too expensive to have made? Need to bootstrap a factory but only have a few bucks? No problem! You just need a metal lathe. Metalworking […]

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Teacup Stirling Engine

[youtube http://www.youtube.com/watch?v=kfEsMYtOHcE?wmode=opaque&w=560&h=315] There’s energy all around us, just waiting to be tapped. Whether it’s a hot cup of coffee on a cold day, light from the sun, scented candles, or waste heat wafting from electronics, it’s all potential power waiting to be harnessed! This is the world of the Stirling engine. Have you ever tried […]

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Animal Detector

My 4-year-old son comes up with some funny ideas. A few months ago, he asked for a piece of cheese to leave outside for animals. We gave him a slice of cheddar. The next morning he jumped out of bed and hurried to the window. The cheese was gone, but who had taken it? He […]

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Hydraulic Espresso Tamper

Godshot. That’s the elusive goal of espresso fanatics everywhere. Thick with micro-bubble crema and a velvety mouth-feel, and packing explosive flavor, the godshot is pulled too infrequently for my liking. A perfect shot of espresso is the product of many variables, so anything I can do to lock in one of those variables is a […]

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