The LED Traffic Light and the Danger of "But Sometimes!"
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旧式交通灯的废热顺带融雪。换 LED 后,亮度满足要求仍可能在特定风雪条件下被遮住。讲者展示了把加热和照明分别控制的设计。
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keeping snow and ice from building upsensors onboard measuring temperature and humidity