Sinking 80 mA with a microcontroller without any driver circuit? is a general question on parallel current sourcing capabilities, but it was single handedly closed and migrated to Arduino.Se. It has nothing to do with Arduinos specifically, and mentioned other platforms in the same sentence, like the Raspberry Pi, yet was migrated to Arduino.
It was rejected for that reason, and still remains closed here, as this question does not appear to be about electronics design within the scope defined in the help center. when it's clearly about electronics design.