The LCD requires 3 mA for logic and 120 mA for the backlight.
The max the PIC can handle is 250 mA.
If I get this correctly, the circuit would feed through the LM78L05 producing a regulated 5v. Then I would connect a LED with a forward voltage of 1.7 in series to the PIC, which would produce the 3.3 needed to power the PIC.
The PIC is being used to run a PWM circuit to a MOSFET, external crystal for time and an LCD. Does current have any affect on the I/O ports or on a MOSFET?
What size wall wart should I use?