Check out this Kickstarter: http://www.kickstarter.com/projects/855921126/revolights-wheels
Now then. What is the cheapest hall effect sensors I can get that are compatable with ATTINY85?
How is the reputation of this one? http://www.newark.com/jsp/search/productdetail.jsp?sku=58R2692
Arduino Interrupts Anyone? Great Video found here: http://www.youtube.com/watch?v=0aAwKT0YWJU
Has anyone had success with this sketch?
http://playground.arduino.cc//Learning/ArduinoSleepCode?action=sourceblock&num=5