Yes i am aware that there are plenty of other hacks of this type but mine will be in lots of detail for anyone who has never hacked one before. This hack is paticularly useful when experimenting with motors, arduino or other mico controller circuits, to power a battery charger and any other electronic project that requires external power. I used the first one I made for about a year and it is still going strong, this is just V2.
First of all I would just like to say that the steps in this instructable are based around an Eagle DR-A350ATX power supply, unless you are useing the same power supply then the information in the instructable should be used as a guide only. I also take no responsibility for any injuries, property damge caused by steps given in this instructable, however if you follow the steps correctly you shouldn't have any problems. Also one final not you are working with potentially high voltages (paticularly inside the PSU its self) don't make the same mistake as me and work inside the PSU case while it is switch on or you may get a nasty shock.
philips head screw driver
drill with drill bits
1 ATX switching power supply $20 for a used one or pull one out of an old comp
1 switch $2
12 banana plugs $ 14 (at jaycar)
1 project box/ tupaware container $ 5 (at jaycar)
heat shrink tube
various bit's of wire
superglue or epoxy
all of these materials can be bought online at jaycar.com.au
Plese forgive my spelling it is rather bad :(
Thanks and have fun
Step 1: Removing the Power Supply From a Computer Case
Firstly you will need to remove the side pannel of your computer which is usually held in place by several screws on the rear of the case. Once these screws have been removed slide the panel towards the rear of the case and then lift it up and out (Your case may be different). Next identify the PSU and disconnect all of the wires leading from it, now remove the four screws that hold the psu in place on the rear of the computer case. Now just pull the power supply out and your done.
Step 2: Getting the PSU to Work
- (On a Standard ATX power supply
- yellow =12v,
- red = 5v,
- orange = 3.3v,
- white = - v
- blue =- v
- purple = v
- green = load wire ( the one that we need to turn it on)
Now that we have eablished the load wire connect a multimeter set to VDC to the psu pins to be sure that the voltages listed above are correct, if they aren't write them down on a piece of paper.
Step 3: Mutilating the PSU
Once again sorry for the picture quality
Step 4: Marking and Drilling Holes in the Container
Now see how your container is going to be positioned along with the PSU and drill a hole large enough for the cables to fit through. Once done file it to remove any burs.
If your adding the negative voltage wires in add in extra holes for them, you will also need extra banana plugs.
Step 6: Crimping and Soldering
Step 7: Connecting All the Wires Up
- Start closest to the switch with the three terminals working from left to right
- go to the first negative terminal and connect up two of the black wires
- then move to the next row of three terminals
- so on and so forth.... you get the idea
with this completed you will have a lid half attached and a lot of cables dangling around every where. Feed these cables in to the box in an orderly fassion and ly them in the bottom. Now seperate them agian into colour groups and then place some heat shrink over the wire, pushing it pown. then fold the top of the wire so it forms a sort of oval circle and contacts the rest of the wire, slide the heat shrink over the top and then shrink it inplace. Repeat this with all the loose wires and then ziptie them together just to be safe.
Step 8: Hoooooray Your DONE :P
Go on to the next step if your having problems.
thanks very much for reading my instructable and enjoy your new hacked PSU :P
Step 9: Trouble Shooting
SO have you tried turning it off and on again ?
- The IT CROWD
well have you?
Try using a multimeter to check for voltage between a 12V wire (usually Yellow) and a ground wire (Black)
- check the switch on the rear off the PSU unit, ensure that it is on
- Check the switch on the switch pannel ensure that it is on
- unscrew the top pannel and using a wire bridge short between the two switch terminals (green and black wire)( if this makes it work replace the switch)
- check all of your connections and that they are correct
- What the problem is
- your power supply specs
- how old it is
- any other relevant information (stuff that occured whilst building, anything that may be a possible cause, dropping the PSU or extreme levels of dust.
If you follow these steps i will be more than happy to help :P