The Maker's Box: Is Your LED in Backwards?
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LED Basics: How to tell which lead is positive or negative | West Florida Components
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Clear Green LED 5mm T1-3/4 520nM Super Bright Transparent - 10x 25x 50x Pkg | eBay
Amazon.com: 20 pieces of PLCC-2 Surface Mount LEDs, 3528 Size SMD SMT LED - UV : Industrial & Scientific
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How to identify the positive and negative terminals of an LED if you make both terminals the same size - Quora
How are the LEDs represented in the Starter Kit projects book? – Arduino Help Center
