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is there any easy way to create a blue glow from behind my 27 in imac? i was thinking a usb cold cathode...? Answered

any help would be appreciated

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freakyqwerty

Best Answer 8 years ago

-How about LEDs would the they suffcient?
-If not why not, too dim? too bright? other reasons?
-Other info would help, what are your needs?

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awesomesquaredfreakyqwerty

Answer 8 years ago

i suppose LEDs would work but they seem rather expensive and appear to require some soldering which is a realm i'd rather not venture into. I was thinking that brightness control would be preferable and it would be awesome if it could be controlled from a software control panel but that may be beyond the scope of this project. the main reason i was looking into cold cathode lighting is that they seem cheap and i have located a 4 pin molex to ac adapter which would solve the problem of powering it. the only problem with that solution would be brightness control.

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freakyqwertyawesomesquared

Answer 8 years ago

Yeah I see your reasoning, But I don't have the knowlegde in electronics to know how to make a brightness control 'cause I assume one of those resistors that change their voltage you know, like varible resistors I think their called wouldn't work, though like I said I don't know so don't take my word for it.

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awesomesquaredfreakyqwerty

Answer 8 years ago

Yeah. I was thinking variable resistor too but I don't think that I'd try modding something that's plugged into my wall. (or my computer for that matter.) I guess I'll just keep looking till I find a cold cathode with a brightness control built in. I just don't know about the dangers of that kinda stuff.

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freakyqwertyawesomesquared

Answer 8 years ago

Well I know that messing with mains elecricity is dangerous, but I thought that you wanted to run this off usb? Because usb don't have very high voltage do they? Isn't it somthing like 5v? although if you muck the wiring or soldering up (Not saying you would or anything) you could short the usb port, which ,although the computer would probly shut the port off, wouldn't be good so you'd have to be careful.

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NachoMahma

8 years ago

.  Does it have to be USB powered?
.  How much glow do you want? Would a 100W incandescent bulb be too much? Not enough?
.  Do you want it to come on and go off with the computer or use a separate power switch?

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awesomesquaredNachoMahma

Answer 8 years ago

i was really hoping that the brightness could be controlled by some sort of a control panel on the computer or else a knob that could be turned

a separate power switch would be OK but there is really not enough room behind my computer to house an incandescent bulb and i really want it to be something that i don't have to replace.

im actually thinking back and see that a separate wall wart would be the best idea as i would like the glow to remain after the computer goes into sleep mode.