Randy,
Well a lot depends on how much time you have, and how much you like to tinker.
To me, a computer supply carcass has the same appeal today of what an old TV did when I was a kid. There it was sitting in an alley next to the trash cans. Next thing I had a 5u4 and a 6Bg6 in my pocket...the makings of a CW rig.
In the computer supply there will be a plethora of parts: full wave bridge, HV and LV filter caps, power FET, power diodes, resistors, caps, heat sink(s), hardware, lots of nice wire, etc. If you gutted the whole thing, you could make an entire junk box from which you could build things, modify stuff. The same is true with a compact CFL lamp. In the base is a treasure chest full of parts....enough to make a QRP rig, or even a transceiver using a regenerative detector / oscillator.
Those toroids in the CPS are usually a common mode power line filter. The permeability of the cores is extremely high. They are best for 1 Mhz down. Could be used for an audio inductor in a LC circuit, or perhaps a speaker crossover device, etc. The ferrite transformers are good for switching supplies from 50-500 Khz or so, and if you can disassemble them, then you could re-purpose them to your own needs such as a DC to DC converter to fulfill some special need.
Have fun, experiment, and learn.
Jim
Wd5JKO
