On second thought, I have further questions (see below) before I buy
the parts. Here is some info about one of the supplies I have:
AC input (230V 50/60Hz):
+5VSB 2A (what is VSB?)
5V stand-by.. used for powering peripherals that can wake up the
computer when there's activity.
+3.3V & +5V MAX 200W
2.03 (ATX12V standard?)
- Is the 10ohm 10w resister ok, should I go lower (eg. 7ohm 5w)? The
link above states a fix to get a higher voltage by wiring two 1ohm 10w
resistors in series
I suggest you experiment with resistors. Some ATX PSUs I've tried
didn't even need a dummy load to function correctly.
- Is there an issue with using the PS on/off switch to turn it on and
off? Or, do you recommend I connect the green and black wires to an on
/ off switch (SPDT)?
Shouldn't matter. If you use the main on/off switch, remember to make a
permanent connection between green/black.
- Is there a problem with using a small heat sink on the resistor (if I
can find one small enough), rather than heat sink compound?
As long as the resistor doesn't get too hot, any method will work. If
you can still touch the resistor after using it for a while, you're OK.
By the way, does your PSU have short-circuit/overload protection ? If
not, I'd put a fuse in there as well, otherwise you risk blowing up the
PSU.. or put a suitable light bulb in series while you're playing