> If y'all think running LEDs straight off the pic is bad (and I'd *never* > consider doing it in anything but a quick 'n dirty proto circuit such as > this), don't even ask what I've done with op-amps! Serious answer: this (I assume you mean you've run LEDs straight here too) might not be really bad. Aside from perhaps some very old or very special-purpose parts, op-amps generally have output current limiting; a few even have a significant (100-1000 ohms) series resistance.