Hmm. See my idea was to draw power from the RS232, and then once I have a decent voltage after the voltage regulator, use nMOSFETs to increase my current. I'm trying to power a series of LEDs, 32 in total, using 8 I/O pins from the PIC. Do you think that's feasible? I know each LED needs about 20 - 25mA of power. My knowledge of MOSFETs is sketchy but I figured even a small gate current would yield a large drain current, or have I got that wrong?
I guess this is more a general electronic question!