I made this LED suit. It's made out of about a hundred button pins I designed that each have 6 RGB LEDs (described here: mistercrunch.blogspot.com/2010/11/led-button-pins.html), an ATTINY48 microcontroller. They are all networked and each one can send messages to their neighbors.
The PWM and UART are both software.
Was at Burning Man 2011.
More info here: mistercrunch.blogspot.com
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