I am a newbie in electronics and I am trying to drive an LED with a series resistor from a 3.3V microcontroller. The max strength of my microcontroller is 6mA and I have purchased an LED that has a forward current of 5mA and forward voltage of 2.9V (SMLE13BC8T from element14).
LED Datasheet - http://www.farnell.com/datasheets/2291105.pdf?_ga=2.248677317.314538259.1522008542-1628637695.1510818085&_gac=1.187272666.1519702428.CjwKCAiA_c7UBRAjEiwApCZi8b1AXd13x8uo1jKdDvDSS0hVLYvivMQv_-U7Wa3ZxPwHUqg1C72JOhoCITMQAvD_BwE
I did the resistor calculation and found that a 100 ohm resistor will be able to drop my voltage to a usable range for LED. Before testing this on the actual microcontroller I tried the LED - resistor combination by supplying 3.3V and found that the LED is super bright and heats up in few minutes usage. Hence I measured the current across my circuit using a multimeter and found that it is 71.6mA. I tried to increase my resistance to 200 ohms and the LED did not glow. Can someone help me to solve this. Am I using a wrong LED ?
I did search the forum for similar issues and did not find the answer, hence please don't close this as duplicate.