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Hi, thanks for looking! The easiest way to do what you want might be to purchase a pre-built RGB controller, like this: https://www.adafruit.com/products/678I see this one offers speed and brightness control, but you'll want to check with them to see whether the slow speed will actually get you down to the "days" timeframe. Sounds like a cool idea - Good luck!
Nandhopper 1-Bit Noise Synth
Bar Bet - cool!
Revive Nicad Batteries by Zapping with a Welder
Professional Looking Gadgets
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