I want to use a H11AA1 to detect Zero Crossing, but I am not sure how circuit should look like. How much voltage should LED receive inside H11AA1?
Here is datasheet: http://www.vishay.com/docs/83608/h11aa1.pdf
By my calculation, please correct me if I am wrong. Forward continuous current from datasheet 60mA.
Resistor should be 220/0.06= 3.6k With wattage 220*0.06=13.2W
Here is some circuit which I found but not seem legit...