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ATX Power Supply Retrofit
Page 1 - Gettting Supplies
Author: DCFluX
Date: March 18, 2003
Category: Guide
Options: Printable Version 12 pt Times New Roman 10 pt Times New Roman 12 pt Tahoma 10 pt Tahoma


ATX Power Supply Retrofit


Ever feel like an idiot after you spent 20 bucks on a Lucite lid for your power supply, only to find out it will not fit in your case because of the extra 1/8" of thickness? Screw that noise, my theory is to leave the lid the same and play around inside. In this guide I will add an internal auxiliary power socket to run a pump, light bulb or what ever else you like and just to make it just like good old times. I will also add an external monitor connector. This will make it so that when you turn off your PC the pump and monitor shut off also. There is nothing more annoying then a monitor complaining about no input signal. [Editor: There are other modifications depicted in the pictures in this guide. However, the guide itself only fully covers the adding of the auxiliary AC power connectors]

* A word of caution to our younger audience: we will be playing with the 120 volt mains, not to mention all the lovely charged capacitors that always lurk inside switch mode power supplies. Be sure to have electrical work done by a licensed electrician or at least under adult supervision. Neither I or Xtreme Tek will be held responsible for damage to you, your computer, or anything else. Be sure to use heat shrink or Scotch 33+ electrical tape for all 120 volt main connections. With that said, on with the show.

Lets go shopping; the first stop is optional to FrozenCPU.com for some cable sleeving. This is available in several colors, Pick which ever suits your mood. You will need 2 feet of 1/2" and 4 feet of 1/4". Stay away from their heat shrink, it sucks and will split when heated. While you are here you might want to grab an LED fan for your power supply. Most power supplies have 92mm fans, but make sure.

The next stop is the local Radio Shack. Here you will need to buy a 12 volt coil 10 Amp DPDT relay and matching socket, 6 amp DPDT switch for "force on", 6 amp SPDT switch for "fan speed", pack of 1N4001 diodes, and 0.1uF disc capacitor. Also, grab a bag of the assorted sized heat shrinks.

Moving right along, go to a local computer store; here you will need 2 of the monitor power cord pigtails. These have a female 120 volt plug and a male computer power plug and are either 1 foot or 6 feet long. While you are there ask nicely or raid their dumpster for an old AT power supply that has the female computer power (monitor) socket.

The Supplies
The Supplies

Last stop is at your hardware store for some rubber grommets. These should be the size of the wire on your pigtails. Also, grab an extra pack of cut off wheels and a high-speed steel cutting bit for your dremel.

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