Egg Heads Puzzle

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As a retirement present for Joe Malkevitch, a geometer friend who likes puzzles, I designed and built this 1′-diameter Egg Heads puzzle from ¼” walnut. Many of my sculpture and puzzle designs require laser-cutting or other computer-guided fabrication technology to accurately produce intricate parts. But this design is simple enough... Read more »

Civilized Cat Toilet Training

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Would you let your guests crap in a box on your floor? No? Then why would you let your cats? Here’s how to get them using the toilet like civilized members of the family. Aside from the risks of toxoplasmosis and other diseases transmitted by cat feces, there’s significant labor... Read more »

Lunchbox Laser Shows

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Back in the 1970s, my friend Wayne Gillis and I used to do light shows at science fiction conventions. We had the usual panoply of overhead, slide, and custom-made projectors, and a single, very expensive, helium-neon laser from Edmund Scientific. Calling ourselves Light Opera, and later, Illuminatus, we performed at... Read more »

Rock ‘n’ Roll Speakers

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Whether you’re at a Bangkok hostel or backpacking in Goa, you can rock out to your favorite tunes with these portable Rock ’n’ Roll Speakers, a set of customizable, low-fi travel speakers that allow you to take your music everywhere. The speakers are driven by a simple power amplifier circuit... Read more »

Wreath for Solstice / Yule / Christmas

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I demonstrate how I make a wreath using Xmas tree clippings and eucalyptus, and adding a string of storebought battery-powered LED lights. You can add other clippings and decor of your own, and you can probably make your own wreath ring as a base, but this is how I learned... Read more »

Snowflake Coasters

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For the past few years, I have seen pretty little laser-cut ornaments in the craft stores. Recently, on a paint run to Michael’s, I discovered an assortment of lovely unstained snowflakes. They were so pretty, I scooped up about a dozen or so. They are the perfect size to place... Read more »