I can't find any info on this. What's a typical resistor to use for the back light on a generic 16x2 LCD display with Blue backlight? I'll connect it to the 5 volt pin. thanks

LCD Backlight current

SouthernAtHeart February 24, 2011, 3:13pm 8

I just ordered this from SparkFun.

white on black LCD...
the spec sheet says
typical LED voltage 4.2
typical LED current 120ma

so, on the 5volt pin, (5.0 - 4.2)volts/ .120 = 5 ohms?

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