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A DIY E-bike Conversion on the Cheap

Cars That Think

Terrafirma Technology , a company started by an engineer named Michael House who has gone into business supplying 3D-printed adapters to people who want to repurpose lithium-ion power-tool batteries. This article appears in the September 2021 print issue as "An Instant E-bike.". As I raced ahead, I chuckled to myself. "OK

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A DIY E-bike Conversion on the Cheap

Cars That Think

Terrafirma Technology , a company started by an engineer named Michael House who has gone into business supplying 3D-printed adapters to people who want to repurpose lithium-ion power-tool batteries. This article appears in the September 2021 print issue as "An Instant E-bike.". As I raced ahead, I chuckled to myself. "OK

DIY 98
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The Transistor at 75

Cars That Think

In honor of this most important of technological achievements, this issue’s package of articles explores the transistor’s historical journey and potential future. The transistor would never have become so useful and so ubiquitous if the semiconductor industry had not succeeded in making it small and cheap.

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New nanolithia cathodes may address technical drawbacks of Li-air batteries; scalable, cheap and safer Li-air battery system

Green Car Congress

An international team from MIT, Argonne National Laboratory and Peking University has demonstrated a lab-scale proof-of-concept of a new type of cathode for Li-air batteries that could overcome the current drawbacks to the technology, including a high potential gap (>1.2 V) Nature Energy 1, Article number: 16111 doi: 10.1038/nenergy.2016.111.

Cheap 150
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OneD, Koch Modular partner to scale up silicon-graphite EV anode materials – ET Auto

Baua Electric

Over the last decade, Chinese suppliers have flooded the market for polysilicon – high-purity silicon – market with cheap supplies, making new U.S. “But due to the desire… for the Western world to own the technology, our silane production system is available once more.” Koch Modular, minority-owned by U.S.

Auto 98
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Tesla building permits reveal unannounced ‘Lithium Lab’

Teslarati

Foremost, relating to its upcoming Texas-based refinery, the lab could work on refining technologies, helping to make the process as cheap and efficient as possible. Third and finally, the facility could be used for battery development, testing different lithium-ion battery technologies to improve energy density.

Building 105
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Hi-fi, Radio, and Retro: The DIY Projects Spectrum Readers Love

Cars That Think

This month we’re celebrating the launch of our second PDF collection of Hands On articles, which IEEE members can download from IEEE Spectrum ’s website and share with friends. 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).

DIY 72