If I use 7.5VDC to power the arduino, then I need to pull +5V from *somewhere* to power my shield electronics. In the past, I've pulled it from the arduino +5V regulator through the +5V connector. However, I'm nervous about adding an extra 100-300mA of load to that regulator.
Oh, that's a neat little board. I see what looks like a ton of input protection resistors on the output pins, but where are the resettable fuses?
I am curious though why you wouldn't have replaced the 5V linear regulator with a switcher.
Oh, I see. I misunderstood and thought there was a different fuse for every single IO pin! Still, wow on finding a resettable fuse so tiny.
$40 is a darn good price for an arduino version with even just added input protection resistors and some extra protection zeners.