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Just in time for Valentines day, a small gadget to be given to your sweetheart: a heart that loops through multiple animations. It nicely fits on a desk or table to have your loved one remember you!
This animated heart is very compact and simple: just switch it on and the 12 LEDs that form a heart will cycle through a loop of animations that you can fully customize.
It runs off a coincell and is based on a very common and cheap microcontroller, the 8-pin ATTINY13, which can be conveniently programmed with an Arduino Uno. Through the special technique of charlieplexing, 12 LEDs can be individually controlled with only 4 output pins.”

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