How to get the best range out of an IR LED?
Currently I'm using this RadioShack High-Output Infrared LED
[Radiant Power Output = 16mW min
Forward Voltage = 1.2V
Forward Current = 100mA
Wavelength = 940nm]
with a 100 Ohm resistor in front of it and only get a foot or two of range. I'd really like to get out to about 20 feet but I could make due at 15/16 feet. So I got nose-y and opened up my TV remote... it's all surface mount, but as best I can figure it the signal leaves an IC, goes through a 100 Ohm resistor and then goes into a transistor (labeled 2T) before heading out to the IR LED. The third pin from the transistor snakes around to a bunch of other parts and I lost. So I was wondering what to do to increase the range of my IR LED... change the resistor? Power it via a transistor? If I can use a transistor does anybody know how to wire it up?
Any help is much appreciated.