The theory is sound, but most EL inverters won't fit inside. I've used a special 5v inverter designed for use inside keyboards that may work, but I only knew of one place that sold it & their site is no longer working for ordering anything. It was
NEON TRIM if you want to contact them.
i haven't tried the electroluminscent mods but i would start off by researching small inverters.
Cool Neon is one source for them and specialises in el wire and inverters (they call them drivers there). they have them as small as operating a few inches off a button battery and others that operate in various voltage inputs. find one with dimensions that would fit inside the casing, offers acceptable brightness with respect to the battery and voltage you plan on using.
[i've used their 9v pipsqueak ones for my tron-inspired shoes -which i've yet to share on these boards because i'm considering working on another variation of them -time permitted.]
you can also mod the casing. spray white or chrome paint in the interior so that more of the light can bounce out. drill holes in the black plastic of the inner c-ring to let more light out -preferably to give the 16 sections effect as found in the movie versions...
Anyone know how to use the exsisting 6 batteries in the disk to light up EL wire directly?...
from the discs i have, they appear to be two rows of three batteries on the inner and outer ring. assuming the button batteries are around 1.5v each, that's about 4 to 4.5 volts per row.
if you're removing the toy electronics anyways, this compartment can be re-wired in series, upping the voltage to in the ballpark of 8 volts. thought i'd mention that if people would like to use what's already there with space considerations and all.
as a side note: personally, i'd hate to mix different size batteries to obtain a certain voltage. also, i'd probably not use button batteries for e.l. because of the drain they might incur, but adding even more button batteries wired in parallel might be beneficial to boost the power capacity.
one idea someone might be able to try is to use another type of battery such as... say a lipo (lithium polymer) that would recharge via a usb port and power the small inverters for the e.l. wire. an extra lipo charging circuitry would be needed to prevent overcharging and the seriously inherent issues with charging them directly. this circuitry is crucial because lipos are known to catch on fire, expand, and do other undesirable things. also, there's lithium variations of household battery sizes and lithium ions. this strays into a whole other category of good, viable batteries for this disc that could be charged via usb.
if you can hit up your rc hobbyists, many of them have great experience with lipo and other rechargeable portable battery types. they may even have experience on how to incorporate them well into this project.
and, with a usb port, one can even mod one of those spy web cams with a micro sd recorder built into them (like the md80 or 808 sans housing) into a disc webcam when connected via usb... but i digress. ^_^
i still see lots of potential for various mods and glad to see interest in them.