Hey
I'm designing a circuit that uses a pic16F876 to mutiplex some red LEDs. In the data sheet it says the pic can only sink/source a maximum of 25mA per IO pin. Is this a limit caused by the design of the chip or is it a case of it can sink/source more but it would damage it?
If it is a case of 25mA being a limit, if I wanted to drive a LED with 25mA from an IO pin, would a resistor still be required? Or do i still need one to create the desired voltage drop?
Thanks.
I'm designing a circuit that uses a pic16F876 to mutiplex some red LEDs. In the data sheet it says the pic can only sink/source a maximum of 25mA per IO pin. Is this a limit caused by the design of the chip or is it a case of it can sink/source more but it would damage it?
If it is a case of 25mA being a limit, if I wanted to drive a LED with 25mA from an IO pin, would a resistor still be required? Or do i still need one to create the desired voltage drop?
Thanks.