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

metal lathe

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... Read more »

Teacup Stirling Engine

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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... Read more »

Animal Detector

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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... Read more »

Hydraulic Espresso Tamper

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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... Read more »