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For an amplifier, the small ( 42mm x 147mm x 120mm ) Lepai Tripath TA2020 chip amplifier, that comes with both a treble and bass knob and runs on 12VDC 2A for $25 or less, would work very nicely.
If you were like I am - on a disability income and with too much free time and an electronic vocational background - projects like this keep the mind sharp and the hands busy in a non-physically demanding way. Even if I didn't need a CD player, or took it apart right after seeing if it worked, it may lead to a better idea and a more worthwhile project.
Hmmm... I like the idea, but the PC power supply is a bit large. What about using a 12V DC wall-wart and a small 5V regulator? That would make a compact power supply. Since we're salvaging parts, look at wall-warts for old telephones, especially those with built-in answering machines (even digital). I have found a couple that were 12V DC. Maybe a printer or laptop PS... Might be bale to find a similar PS with 12V and 5V DC doming out of it, that would be ideal, but I can't think of anything that has a PS like that (I'm thinking the brick with cords type). Like these:
You know, a couple wall-warts (+12V DC and +5V DC) on a cheap extension cord would probably be the lowest cost (best?) way out. Plenty salvageable wall-warts out there -- more 5V DC than 12V DC. Would still be compact compared to a PC PS, and could be mounted outside a case for the CD-ROM -- plug both directly in the wall even!
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