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Thanks for posting the link to the drive bay covers. My computer has had an ugly hole in its face for YEARS after I realized I only needed one CD drive.... No more!
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Originally Posted by Oya? /img/forum/go_quote.gif
EDIT: Also another thing I'm curious about but I guess it depends a lot on the particular amp design; will I have any grounding issues with the PC case?
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Good thinking and looking out for what can become a VERY real problem.
I learned about this one the expensive way with an amp with "virtual" ground that I wanted to run off of the +12V line in my computer while grounding it to "real ground" at my soundcard. Virtual ground is inherently several volts away from ground - all grounds are not created equal! and both my soundcard and amp bit it.
The comment was made to regulate down to 5V, I would say 9V. 9V gives enough voltage drop for most regulators to work with off of a 12V supply, and buys you a little more room for the amp to work under.
As for stuff you could build in a drivebay:
If you dont need much gain an amp like the szekers could easily be built on a 9V supply.
People have built MANY Comy type amps with 9V supplies. Be careful with that virtual ground! You may be better off thinking up a way to cap couple the inputs & outputs of the circuit, and float the opamp while having the output at "real ground" Its a bit of work, but much better than what happens if you screw up a Virtual ground.
There are probably a few more. Check them out. Most things that can run with a single 9V cell could be made to work.