Hey guys - how is everyone doing? Was hoping I could get some direction in setting up an array of 940nm 8mm LEDs. I watched a few YouTube Videos and found a guy that used 850nms and gave the specs to wire them in series but I want to be sure I understand the specs on the LEDs I am purchasing. Here is are the specs of the units.
Wavelength : 940nm
Tsol: 5second @ 260'C
MCD=50@ 350mA, MCD=70@400mA
I also found an LED Calculator online here: http://led.linear1.org/led.wiz
Am I correct in assuming that diode forward voltage is 1.4 (or 1.5 which should I use?)V and diode forward current is 140ma? I would like to use 5 of these in series with a 9 volt battery and I am trying to determine which size resistor I would use to prevent destroying the LEDs. If anyone could tell me what the abbreviations on the specs mean I would appreciate it. Thanks guys!