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Heating Buildings With Solar Energy Stored in Sand

Cars That Think

As we try to objectively study nature, we are often reminded of how natural forces affect us personally. When we turn up the heat in our homes and workplaces, we must balance our personal need for warmth with the global impact of burning fossil fuels like oil, gas, coal, and biomass. The apparent contradictions do not end there.

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Build Your Own Hi-fi Ear Defenders

Cars That Think

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. I was on the hunt for another cheap small MEMS mic that could handle louder sound sources.

Building 122
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IoT-ize Your Old Gadgets With a Mechanical Hijacking Device

Cars That Think

KAIST/Korea Polytechnic University The paper doesn't directly address the cost of the MHD, and with three motors and some other electronics in it, it's not likely to be super cheap. It's also possible to build your own MHD device for cheap , if you know what you're doing.

DIY 143
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BYD’s home city in China now has more supercharging plugs than gas pumps

Baua Electric

So all those cheap EVs need to be fast-charged, and what better place to expand than BYD’s home city? In June 2023, Shenzhen unveiled its first fully liquid-cooled supercharging prototype station as part of its “City of Supercharging” plan, in which it set a goal to build as many supercharging stations as gas stations by 2025.

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Just Calm Down About GPT-4 Already

Cars That Think

Brooks, who is now working on his third robotics startup, Robust.AI , has written hundreds of articles and half a dozen books and was featured in the motion picture Fast, Cheap & Out of Control. We see a person do something, and we know what else they can do, and we can make a judgement quickly. And we’re really good at that.

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

Cars That Think

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.

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Sheffield engineers use 3D printing for a 1.5m-wide UAV prototype

Green Car Congress

The engineers said the polymer craft could form the basis of cheap and potentially disposable UAVs that could be built and deployed in remote situations potentially within as little as 24 hours. Using support material adds a direct material cost, and significantly increases build time, in some cases by an order of magnitude.

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