This is an Arduino sketch that uses the FastSPI library to drive the TM1809 chip and LEDs with an ultrasonic sensor.
It is designed for the interactive exhibit '21 Umbrellas' driven by 3rd Year Interaction Design students from Emily Carr University and installed at Pacific Centre Mall in Vancouver.
It opened April 30th, 2013.
http://www.ecuad.ca
http://www.pacificcentre.ca
http://21umbrellas.com
https://twitter.com/21_umbrellas
FastSPI http://code.google.com/p/fastspi/
Code done by Haig Armen, Robert Werner, and Jesse Scott