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LEDs for Beginners
A thorough and well-written introduction to LEDs by Noahw on Instructables.
LEDs are at the heart of many different maker projects, from paper circuits to more complex microcontroller projects, so it's always helpful to have a firm understanding of how they work.
That looks really handy - will take a look!
Yes, very handy, really like the close up photos of LED and detailed electronics explanation, great resource