MODing a PSU: Taking 12 volts to 2 (for LED's)

BadPenguin · 02-22-2004, 11:56 AM

How can I do this? I am having a "pump station" and in it, I have its own dedicated power supply. I want to take one of the 4pin molex connector (12 volts?) and I want to make it only output around 2, no more than 2.2. I want to do thihs because I want a dedicated LED line. Does anybody know how to do this, or know what im talking about? I know there are kits I can buy that will do this for me.. but the only one I foudn is $20, and I dont want to really spend hte money on something I could probally do myself for $5. Thanks in advanced.

Groth · 02-22-2004, 12:32 PM

It would be easier would be to use the 3.3 volt lines. Connect two rectifier diodes (5 watts or better, voltage rating irrelevant) in series with your LEDs. That'll give you 2.0 to 2.1 volts to power as many LEDs as you want.

BadPenguin · 02-22-2004, 12:52 PM

Quote:

Originally Posted by Groth

It would be easier would be to use the 3.3 volt lines. Connect two rectifier diodes (5 watts or better, voltage rating irrelevant) in series with your LEDs. That'll give you 2.0 to 2.1 volts to power as many LEDs as you want.

where can I get rectifier diodes? you culdnt give me more info.. Ive never done this before, im a first time mod/water cooler. I know a fair amout about eletricity, (enough not to get eletricuted) but i can connected those things if i have a lil bit more info. The gnd wire is black, and 3.3 volt line is the one that goes to the floopy? if so, is it the red or yellow one, or are they the same?

and i couldnt get these rectifier diodes at radio shack could I?

superart · 02-22-2004, 04:11 PM

http://www.radioshack.com/product.as...%5Fid=276-1661

would this work?

bigben2k · 02-22-2004, 11:05 PM

Quote:

Originally Posted by superart

http://www.radioshack.com/product.as...%5Fid=276-1661

would this work?

Yes, that'll be just fine. You could run over 100 LEDs with that diode, BTW.

Groth · 02-22-2004, 11:27 PM

Do you have specific LEDs you plan to use? When you said 2 V, I assumed you did. But now that I realize you're a water and modding virgin....

Different colors and types of LEDs need different voltages. Check your LEDs - what voltage and current is listed?

Yup, those Radio Shack diodes are great. The 3.3 V line is the orange wires on the ATX connector. The four-pin floppy and hard drive connectors don't include 3.3 V. Ground is the black wires.

Aardil · 02-23-2004, 12:07 AM

If you look around at Radio Shack they have LED's that will work off of 12 volts. No modding needed.

Aardil

02-22-2004, 11:56 AM	#1
BadPenguin Cooling Neophyte Join Date: Feb 2004 Location: USA Posts: 41	MODing a PSU: Taking 12 volts to 2 (for LED's) How can I do this? I am having a "pump station" and in it, I have its own dedicated power supply. I want to take one of the 4pin molex connector (12 volts?) and I want to make it only output around 2, no more than 2.2. I want to do thihs because I want a dedicated LED line. Does anybody know how to do this, or know what im talking about? I know there are kits I can buy that will do this for me.. but the only one I foudn is $20, and I dont want to really spend hte money on something I could probally do myself for $5. Thanks in advanced.

02-22-2004, 04:11 PM	#4
superart Cooling Savant Join Date: Mar 2002 Location: FL Posts: 787	http://www.radioshack.com/product.as...%5Fid=276-1661 would this work? __________________ When you do things right, people won't be sure youv'e done anything at all. Looking to buy/trade for used Deep Fryer and Vacume Pack Sealer.

02-22-2004, 12:32 PM	#2
Groth Cooling Savant Join Date: Mar 2003 Location: MO Posts: 781	It would be easier would be to use the 3.3 volt lines. Connect two rectifier diodes (5 watts or better, voltage rating irrelevant) in series with your LEDs. That'll give you 2.0 to 2.1 volts to power as many LEDs as you want.

02-22-2004, 11:27 PM	#6
Groth Cooling Savant Join Date: Mar 2003 Location: MO Posts: 781	Do you have specific LEDs you plan to use? When you said 2 V, I assumed you did. But now that I realize you're a water and modding virgin.... Different colors and types of LEDs need different voltages. Check your LEDs - what voltage and current is listed? Yup, those Radio Shack diodes are great. The 3.3 V line is the orange wires on the ATX connector. The four-pin floppy and hard drive connectors don't include 3.3 V. Ground is the black wires.

02-23-2004, 12:07 AM	#7
Aardil Cooling Savant Join Date: Oct 2002 Location: Louisiana Posts: 174	If you look around at Radio Shack they have LED's that will work off of 12 volts. No modding needed. Aardil

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