Question

http://lilypadarduino.org/

https://github.com/web-goddess/commaclubcushion

Capacity for AAA battery: 860-1200 mAh at 1.5V

x 1.5 = 1300-1800 mWh

Max power dissipation for each LED: 120mW

Each comma has 10 LEDs, so 10 x 120mW = 1200mW

All three commas = 3 x 1200mW = 3600mW

3600mW / 1500 mWh (taking average) = .42 hours = 25 minutes

Ignoring the power to the Arduino and loss in the conductive thread. :)

How long will the battery last?

What ILearned