I have a very simple problem to solve and I'm surprised there is no common solution for it.
I need to connect several indicator LEDs to microprocessor outputs and I know I need a serial current-limiting resistor. To save space I'd like to have LED that takes 3.3v without resistor. There is a couple out there rated 3.3v but I understand it is not safe to connect it without resistor even though it is 3.3v rated.
Also they are 20mA, I'd prefer 10mA since they are driven directly by MPU with 200mA total output limit.
Since this is such a common problem, I'm sure it must be solved and I might be just looking into wrong direction. Please enlighten me!