NeoPixel LEDs are pretty smart minuscule addressable devices, and little effort is needed to set up and run because you need only one I/O of your microcontroller to control them all in a vigorous manner. The maker notes that every segment can be lit in a different color so the combinations are only limited by your imagination. The recent introduction of RGB LEDs with a built-in controller in the form of WS2812b LED strips has been a game-changer as far as large-scale LED projects. Of course, a couple of the usual prototyping accessories will be required as well. It’s not just any old clock, it’s an illuminated clock built with seven-segment LED modules and programmable with the Arduino Pro Mini or Arduino Nano.
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