- looked at parts within an led:
forward voltage, reverse voltage,
too high voltage: too much current.
if you seek too high current from arduino, arduino reduces voltage:
image
extra voltage gets applied to arduino.
vr + vled = power supply
vr - vled (from the voltage drop of the led)
r = v / i = v / desired current of the led = resistor needed.
stevens power law to adjust for corrected perception.
pgmspace library keeps arrays or data in program memory instead of it going to ram.
polycarbonate sheets for light diffusion.
