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 Post subject: Super cheap Emotia power supply that anyone can make
PostPosted: Wed Jan 25, 2012 9:48 pm 



Joined: 12 Sep 2009
Posts: 611
The deal with these power supplies is nobody wants to pay 35 or 60 bucks for them on ebay, but still wants to fix their Emotia. Thankfully, there is a solution, costing only about 10 dollars and servicing god knows how many other pieces of equipment you have laying around that need custom power supplies.

An ATX power supply plus an adapter can mean an Emotia power supply for 10 bucks, and if you're willing to spend a bit, you can make adapters for all sorts of things, including those cheap scalers from china that use +5V but come with no power supply, or even a super gun.

http://www.ebay.com/itm/300641437370?ss ... 1439.l2649

I bought a few of these. They were cheap, had nice long cables to tap into, and they exposed all the pins I cared about (+5, -5, +12, -12, +3.3)
BIG NOTE: If you want -5, you'll have to use a rather old ATX power supply. Thankfully they're reasonably easy to come by (Any old computer with a Pentium 2 or Pentium 3 chip). the -5 pin was made optional in 2002, and everyone stopped including it in 2004 when it was removed from the ATX spec. So for the Emotia, you don't need -5, but if you're building a super gun, you might want to make sure you have the pin in question. Check that the wire for the pin is going into your power supplies connector on this page: http://pinouts.ru/Power/atxpower_pinout.shtml

If you buy the object I linked above, this is easy. The colors on that are standard (even though the ones in my Emotia cable were not, so I won't list them)
So:
Ground is all of the black wires.
+12v is the Yellow wire.
-12v is the Blue wire.
+5v is all of the Red wires.
-5v is the White wire (useful for Super Guns)
and +3.3v is the Orange wire (useful for JVS Super Guns, or cheap JVS Power supplies)

Those are the color standards for ATX, now, they MAY BE DIFFERENT ON YOUR CABLES, CHECK THAT THEY ARE IN FACT CORRECT WITH A MULTIMETER I AM NOT RESPONSIBLE FOR YOUR EQUIPMENT DAMAGE.

To make an Emotia power supply, you'll need a cable that fits into the power connector on it, Old XT/AT style Keyboards have this cable, if your emotia didn't come with a power cable. Strip off some of the outer jacket to expose the 5 wires.

http://en.wikipedia.org/wiki/File:DIN-5_Diagram.svg

Left to right, +5v, +12v, GND, -12v, GND. All 5 are required. Figure out which wire is which using the conductivity test on your multimeter. Then, simply match the wire to the functional cable on your adapter. Connect the adapter to your ATX power supply and flip the switch on it to the on position. You should be good to go.


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