I am seeking some advise on a making an infrared light source. I am using IR LED SE-5455-2. I have found some calculators on line but the results vary. I have also read many threads here. I am still somewhat confused.
LED specs are Forward voltage drop = 1.7, reverse breakdown = 2, Peak wavelength = 930, forward continuous current = 100 mA.
I want to run 7 LEDs in series and power them with a 12VDC power supply that can deliver 1 amp.
How can I determine what I need for a current limiting resistor?