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Hi-fi, Radio, and Retro: The DIY Projects Spectrum Readers Love

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Far and away our most popular article in the last five years has been “ Build Your Own Professional-Grade Audio Amp on the Sort of Cheap ” (November 2018). And a follow-up to that article, “ A Web-Enabled, High Quality, DIY Audio Amp ” (March 2022), comes in at No. Are there trends in DIY projects you think we’re missing?

DIY 75
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From Cleaning Offices to Designing EV Charging Stations

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Greta Bekerytė started out cleaning offices and ended up designing electronics for EV charging stations. He was a DIY enthusiast willing to try his hand at just about anything, from electronics to plumbing. I always knew I wanted to be a specialist: a person that others would go to because they knew something really well,” she says.

Clean 100
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Build Your Own Hi-fi Ear Defenders

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For years, I have been trying to improve my personal audio-monitoring situation without going to the expense of the systems used by professional touring bands, which include custom-molded earpieces. The WM8960 has a quieter initial gain stage that’s designed for microphones. It was for the audio codec chip by Wolfson, the $18 WM8960.

Building 120
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IoT-ize Your Old Gadgets With a Mechanical Hijacking Device

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It's not hard to turn them on and off with a connected socket adapter of some sort, but as you start to go back more than a few years, things become increasingly designed for direct human interaction rather than for the Internet, with buttons and switches and dials and whatnot. Or, that was the idea, anyway.

DIY 142
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Energy Harvesting for Wearable Technology Steps Up

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Personalized health care could revolutionize traditional medical practice,” Gao says. But to incorporate many different types of sensors, we need different material designs and tools. This second-generation e-skin sandwiched thin sheets of Teflon, copper, and polyimide that slide as the person moves, generating maximum power of 0.94

Energy 136
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The First Digital Camera Was The Size of a Toaster

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Registration is open ; guests can attend in person or virtually. In a 2016 interview with DIY Photography , he said cassettes were the only permanent form of “digital storage” available to him at the time. He designed it so each tape would store 30 images. That didn’t deter Sasson, who continued to build more cameras for Kodak.

Store 103
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Where the President-Elect Candidates Stand on Key Issues

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If elected, she said, she will focus on increasing the number of women who become life members because, she said, right now women make up only 2 percent of that membership designation. (To The kits teach elementary school pupils what engineers do, as well as how to code, build robots, design video games, and create animations. “We