I have a spiral staircase. I would like to have strips of LEDs under each stair, so when someone walks up the stairs, it lights up the underneith of each stair as they step on it. What sensor would do this the simplest? There is 15 stairs, can the arduino take 15 inputs?

Light up stairs as you walk, need sensor advice

system May 2, 2014, 12:39am 3

Would like to keep it cheap, and not add anything to the stair surface.
Trying to keep the budget under $100
I have an arduino duemilanove and LEDs

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