The average life expectancy of a hot water heater is about 10 years, so it’s not a question of if it will leak — it’s simply a matter of when. In my part of the country, homebuilders have been installing these tanks in the attic. This saves space, but also means that if you don’t […]
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Who hasn’t dreamed about owning their own metal detector and searching for buried treasure, or at least a few dropped coins? In this project, we will build a metal detector based on a dual oscillator circuit. One oscillator is fixed, and the other varies depending upon the proximity of metal objects. The beat frequency between […]
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First I will show you how to make the enclosure, and route the wires. Then I will show you how to hook up the Servo & Arduino.
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It might have been Robots of Saturn that first got my young brain thinking about building a mechanical man. In that obscure 1962 sci-fi adventure novel, Dig Allen and his fellow teenage space explorers transfer their thoughts into the bodies of teleoperated robots to mine Saturn’s dangerous rings for precious Methane-X. Using some of my […]
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Build a simple bike repair stand with parts you can get from a hardware or home store.
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By Cristiana Yambo and Sebastian Boaz The easiest way to start circuit bending is “playing open circuits.” That’s where you open up an audio device and use your hands or alligator clips to mess with the board inside and see what it sounds like. But it’s almost as easy to permanently “bend” any suitable device […]
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How to make a 3-stringed guitar out of a cigar box.
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