I was following the tutorial on http://www.ladyada.net/learn/lcd/charlcd.html
"To calculate the value of the series resistor, look up the maximum backlight current and the typical backlight voltage drop from the data sheet." I looked at the links to the data sheet on the product page http://www.adafruit.com/datasheets/TC2004A-01.pdf
but didn't see a term called voltage drop. I'm also looking for the max backlight current but only saw a term called max input or max supply voltage. What's the best way to find this info in order to pick the correct resistor?