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A DIY E-bike Conversion on the Cheap

Cars That Think

While it would have been nice to engineer some sort of spring-driven mechanism to control how forcefully the motor pushes against the tire, I kept things simple: I just deflated the tire somewhat, bolted the motor solidly in place, and reinflated the tire. So I bought an outrunner. In that position, it's hardly visible.

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A DIY E-bike Conversion on the Cheap

Cars That Think

While it would have been nice to engineer some sort of spring-driven mechanism to control how forcefully the motor pushes against the tire, I kept things simple: I just deflated the tire somewhat, bolted the motor solidly in place, and reinflated the tire. So I bought an outrunner. In that position, it's hardly visible.

DIY 98
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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. Are there trends in DIY projects you think we’re missing?

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Looking to get in a hybrid for cheap? Used Toyota Prius 1.5 HSD 2004-2009 Review

Green Car Congress

I knew I wanted something for her that was cheap to maintain, had a reliable automatic transmission, came with cruise control, AC. We only drove ’normal’ ICE (Internal Combustion Engine) cars before but those gave me a feeling of always being in a hurry. The gasoline engine only runs in reversing to power the batteries.

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Our Hands-On Citizen-Scientist

Cars That Think

With a doctorate in geophysics, Schneider has been helping to make the invisible visible for scientists and engineers for almost three decades at Scientific American , American Scientist , and for the last 15 years, IEEE Spectrum. He notes that his exoplanet detector , which he made back in 2014, still impresses him almost a decade on.

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Is an AC motor in your future?

DIY Electric Car

the "lower" cost systems out there for DIY people. Among this study group, are engineers, scientist types and some. methodology and materials required to do a DIY Industrial AC motor customization. Their findings, so far, are really simple and cheap. Their findings, so far, are really simple and cheap.

DIY 100
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Can This DIY Rocket Program Send an Astronaut to Space?

Cars That Think

meter-tall Nexø II rocket was powered by a bipropellant engine designed and constructed by the Copenhagen Suborbitals team. The engine mixed ethanol and liquid oxygen together to produce a thrust of 5 kilonewtons, and the rocket soared to a height of 6,500 meters. Even more important, it came back down in one piece.

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