I can't seem to get the op265AB infrared LED from OPTEK to light up. I'm using my phone's camera to look for light. This works with Radio Shack part 276-0142 but the OP265AB just isn't lighting up.
I've tried with 100 and 220 ohm resistors, and with 3.5V, 5V and 9V power supplies. Normal LEDs work at the same spot, as does the Radio Shack part.
The docs say that it is 850nm wavelength.
My hope is to use this as part of a model train detector.
What could I be doing wrong?