38khz 3-Pin IR Receiver and Wavelength of the IR LED
August 28, 2010
I just can't seem to find this through google except for actually looking up a diagram of the "full spectrum" so I need a confrimation here. The IR led's that glow a dim red are the one's in the 850nm range, correct? The ones that are "invisable" are the 940nm ones, is this also correct? Also, the 850 is a "stronger" light source? And finally, I can't seem to find a mention in the specifications of the receiver if it will respond to either wavelength.
I have been using this 3-pin "picaxe" IR sensor forever now, I can't believe these questions are only now coming up for me. I am working with 2 beacons now and I just now noticed that A) one could be seen and the other not, and B) the one that glowed dim red seemed to be "found" easier. --Any thoughts here?