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One of the first projects I did with an Arduino was a Christmas lights garland. In fact, it was made of a simple RGB LED strip cut in two, as Arduino has only 6 hardware PWM outputs. I didn’t want it to display trivial rainbows and random colors – after all, a Chinese controller that came with the strip was pretty capable of doing that – I wanted it to show something meaningful. Like time and outside temperature. As an RGB strip can show only one color at a time it is effectively a single RGB LED multiplied many times, so my task was basically to invent some way of showing information on a single RGB LED – hence the OnePixel working title.”

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