|well, i wouldn't say any of those things you've listed really pull any amps/watts. in fact the ide2cf adapter is probably totally passive unless it's got an LED on it. maybe the floppy drive is going to be the biggest power draw - only when it's spinning? not like your running an old 52meg quantum fireball scsi drive in there :)|
and you've swapped out your hard drive for a compact flash card, so thats pretty much the best power saving right there.
the LED's can usually be measured in milliamps. i think the arduino module is 3.3volts...?
my V1200 setup is pretty much the same but i've got additionally a gotek on the floppy port, and instead of your squirrel scsi card, i have a PCMCIA network card.
All running off of a standard amiga PSU for days.
when i used to run a Blizzard1240 i'd have that hung off of an A500 PSU, not for any real reason more than i'd read that it could take the current loading better. and i had a PicoATX-PSU setup with an 80W AC-DC brick running my blizzardPPC+bvision A1200.
if anything, i'm toying with the idea of figuring out a way of powering my V1200 machine via a USB battery pack, or PoE network power splitter...
the only machine that's killed a PSU is my A4k. and thats because i screwed up thinking i could run a 300W flex-ATX PSU in it. turns out that even at 300Watts, couldn't handle the 5V loading of a fairly well expanded A4k. so that's now got a 650W SFX psu - as that's about the level i needed to get to, where a PC PSU could match or beat the original A4k PSU's 180W on the 5V line.
oh wait, no i forgot. my A4kT (why oh why did i sell you *sob*) has a PC-AT style power connector. that machine fully loaded would melt holes into the PSU connector plugs "tongues", and the PSU would need replacing every year or two.
so anyway. PC power supplies these days are all about the 12Volt lines. Amigas are all about the 5Volts. So whatever you plug in, look for at least 3amps at 5volts, make sure you get a PSU that can run a minus 12Volt line as well, otherwise your audio is going to get a bit screwy.
not that i'm shilling for icomp, but at least they're having a go at doing a good replacement PSU it seems... EXTERNAL LINK