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recieved broken cold cathode lookin to wire up led's instead

post #1 of 9
Thread Starter 
ok i just received a broken cathode as stated just lookin for a good tortorial i could use to help hook up some led's to the wires ect.
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post #2 of 9
1.) How many LED's?
2.) What color and type of LED?

(The color and type matter so we can find the forward voltage and current. Your average LED has a forward voltage of 2.5V and a forward current is 30mA. When you buy LEDs, it comes with documentation telling you the appropriate forward voltage and current.)

3.) Next we calculate the resistor values needed. (see links below)
4.) Finally we wire the whole thing up.

http://led.linear1.org/1led.wiz <-- Here is a tool to help you calcuate things if you have a single LED

http://led.linear1.org/led.wiz <-- Here is a tool for multiple LED's.

http://www.kpsec.freeuk.com/components/led.htm <--This gives you sample tables of the typical voltage and currents for LED's. It might answer any questions you might have about LED's or how they work.
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post #3 of 9
Thread Starter 
Quote:
Originally Posted by crimsontears809739 View Post
1.) How many LED's?
2.) What color and type of LED?

(The color and type matter so we can find the forward voltage and current. Your average LED has a forward voltage of 2.5V and a forward current is 30mA. When you buy LEDs, it comes with documentation telling you the appropriate forward voltage and current.)

3.) Next we calculate the resistor values needed. (see links below)
4.) Finally we wire the whole thing up.

http://led.linear1.org/1led.wiz <-- Here is a tool to help you calcuate things if you have a single LED

http://led.linear1.org/led.wiz <-- Here is a tool for multiple LED's.

http://www.kpsec.freeuk.com/components/led.htm <--This gives you sample tables of the typical voltage and currents for LED's. It might answer any questions you might have about LED's or how they work.
im lookin for red led's and as many as i need to light up my case properly (its only a small case so dont need to worry too much
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post #4 of 9
Do you have a local radio shack? I'm writing this assuming you live close to one.

RED Leds' here --> http://www.radioshack.com/product/in...ductId=3096133

How about go with x3 packs of 2 LED's (six LED's total). $6

The ones I linked you to are 2.4V @ 20mA. If you use 6, the best way is like the picture below. If you use more or less than 6 you will need a different resistor.

Resistor here --> http://www.radioshack.com/product/in...ductId=2062318



The yellow wire of the molex connector on your PC power supply is 12V. The black wire is ground. Hook everything up and your good to go.

To connect the wires together the best way is to solder them. Radio shack can help you with that, if you don't own a soldering iron. (If you don't want to solder, you can use electrical tape to connect everything)

EDIT: Oh, your from Australia. Errr....Is there Radio Shacks in Australia? If not, i could link to to another website.
Edited by crimsontears809739 - 4/30/11 at 4:00pm
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post #5 of 9
radioshack is usually rather expensive, so if you don't mind waiting you could get a bunch online, then you have extras in case some die or if you mess up a few while testing.
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post #6 of 9
Yeah, i get most my electronics stuff from digi-key. But i checked, and they charge $30 minimum to ship to Australia unless you buy $200 or more. T_T I thought radio shack was international, but after doing some reading they are not.

Edit: If IXcrispyXI can give me a website of a place that sells electronics in Australia, i can help him pick out the parts to do some LED case mods.
Edited by crimsontears809739 - 5/1/11 at 11:17am
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post #7 of 9
Thread Starter 
Quote:
Originally Posted by crimsontears809739 View Post
Do you have a local radio shack? I'm writing this assuming you live close to one.

RED Leds' here --> http://www.radioshack.com/product/in...ductId=3096133

How about go with x3 packs of 2 LED's (six LED's total). $6

The ones I linked you to are 2.4V @ 20mA. If you use 6, the best way is like the picture below. If you use more or less than 6 you will need a different resistor.

Resistor here --> http://www.radioshack.com/product/in...ductId=2062318



The yellow wire of the molex connector on your PC power supply is 12V. The black wire is ground. Hook everything up and your good to go.

To connect the wires together the best way is to solder them. Radio shack can help you with that, if you don't own a soldering iron. (If you don't want to solder, you can use electrical tape to connect everything)

EDIT: Oh, your from Australia. Errr....Is there Radio Shacks in Australia? If not, i could link to to another website.
nah we dont have radio shack here in australia ill be going to a properly electronics store that sells everything that i need the place i will be going to is called jaycar
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post #8 of 9
Thread Starter 
Quote:
Originally Posted by crimsontears809739 View Post
Yeah, i get most my electronics stuff from digi-key. But i checked, and they charge $30 minimum to ship to Australia unless you buy $200 or more. T_T I thought radio shack was international, but after doing some reading they are not.

Edit: If IXcrispyXI can give me a website of a place that sells electronics in Australia, i can help him pick out the parts to do some LED case mods.
http://www.jaycar.com.au/ this is the place i will be going too
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post #9 of 9
x6 of these -->http://www.jaycar.com.au/productView...D&form=KEYWORD

x1 pack of these (270 ohms. It's a 8 pack, but we only need x2) -->http://www.jaycar.com.au/productView...m&form=KEYWORD

You can go with the less bright RED LED's from Jaycar if you want, they are cheaper. Also, Red led's come in x2 basic styles. A clear plastic with a red light, and a white light in a red plastic. The ones with clear plastic and the red light look much nicer.
Edited by crimsontears809739 - 5/2/11 at 7:54am
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