How to Make an LED or a light emitting diode

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很简单的RGB三色led灯条自动切换电路

LED 电子显示屏

914 the quality control manager at a light emitting diode led factory needs to determine whether the mean life of a large shipment of leds is equal to 50000 hours the population standard dev 27794

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Introduction to LED (Light Emitting Diode) - The Engineering Projects