Post
by Jsilenthunt » Tue Nov 06, 2012 7:17 am
Hi Seth,
You are correct, 4 LEDs in the imager have ample range and external illumination is quite good.
I am doing these to find out if their are other alternatives, aside from the four LEDs, of illuminating TRclip...and the fun of knowing (it's my nature:-D). But you are correct, 4 LEDs are sufficient enough. Although it was noted somewhere(not so sure where) that imager LEDs have tendency to overheat, most likely due to it's enclosure, and can disrupt sensitivity.
Anyway, i run some tests on TRclip....
Having 4 LEDs in imager covered with masking tape, imager readily detected filament bulb flashlight but not LED bulbs. My home-brew TRpro, with 880nm x 3 LEDs, was not detected at all.
It seems reflective material in TRclip attenuate some wavelenght but not certain IR band. Perhaps the 880nm wavelenght of my home-brew TRpro was attenuated by the reflective material too.....hmmmm
I can run more tests if you do find out spec of 4 LEDs....No need to rush this info. As you said before, this are for 'the fun of experimentation'.
thanks again