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TechCrunch Mobility: A ride-sharing pioneer comes for Uber, Tesla loses more ground, and dog-like delivery robots land in Texas | TechCrunch
Welcome back to TechCrunch Mobility — your central hub for news and insights on the future of transportation. Sign up here for free — just click TechCrunch Mobility! It might have been a short week, but there was still plenty of news, including another Zoox recall, an update on the Stellantis-Amazon partnership, and a few…
Ground-fault interruption protection—without a ground?
A friend who was buying an older house was concerned about electrical safety and asked for my opinion as an electrical engineer. All of the AC receptacles (also called outlets) in the house were the two-wire non-grounded type with only a hot (black) and a neutral (white) wire; there were no three-wire receptacles with separate…
PCBs, ground planes, and you
In the early 1980s, a typical printed circuit board inside an 8-bit home computer looked roughly like this: A detail of the Amstrad CPC 464 main board. By the early 2010s, the same tech would be packaged the following way: A close-up of Arduino Uno R3, from a product promo shot. Other than increased miniaturization,…