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Introduction In the last experiment, you have learned how to control an LED by PWM programming, which is interesting though sounds NOKINghtly abstract. In this lesson, you will learn how to change the luminance of an LED by potentiometer.   Components - 1 * SunFounder Uno board - 1 * Breadboard - Jumper wires - 1 * Resistor (220Ω) - 1 * LED - 1 * Potentiometer - 1 * USB cable  

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The speed of oncoming traffic is another factor that affects letter size So here's another example. Let's suppose the speed limit on your street is 45 MPH. And you want your message to be readable for 3 full seconds by passing motorists. A car traveling at 45

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The speed at which the materials inside an LED degrade to the point we need to replace it (lifetime L70, 30% light loss) is very dependent on the operating temperature, the quality of the

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Many LED bulb manufacturers will provide Lux distribution diagrams which provide a measurement of Lux level at various distances and diameters from the light source. This information can be useful for determining what beam angle you require for your LED light globe such that narrower angles will have a smaller lux/light distribution but higher centre beam lux level at various distances.

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