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I nearly bought this kind of thing, but then realised I had all the parts I needed to make it myself, which is half the fun, right?!   This video shows it in action;     What I'm using in this build is;   Part Approx Price 24 LED Ring £2 Arduino Nano £1.75 Breadboard, button, potentiometer, and wires £1.25   The components are wired up like this;     And here's the code (uses the Adafruit neopixel library);   #include <Adafruit_N ...