35mA led with 25mA pic output?

[xnihilo]

Hi Xnihilo,

If you want to keep the full LED brightness you must use some sort of buffer (a small NPN or PNP transistor or a low power N or P channel FET or MOSFET will be your best choices) combined with a 82 Ohm resistor for your 2V 35 mA LED.
If you don’t mind loosing some brightness a limiting resistor (in your case 120 Ohm will give you 25 mA or 150 Ohm will give you 20 mA).
All you have to do is trying and decide.

Regards,

Nick

I understand i should use the 5v power supply with a 82 ohms limiter and switch led with a transistor in order to have full brightness but i do not wish to add a transistor. I should then either choose an inline current limiter and chose the adequate value for let's say 20mA and have a dimmer led or get a 10mA led.
Okay, thanks all for your answers.