Yet Another ATX Test Bench Power Supply

I was inspired to build my own test bench power supply following the excellent tutorial by JumperOne. It was actually very simple to do and I didn’t get electrocuted in the process.

I didn't end up using the +3.3V or -12V outputs since I seldom use those values.
I didn’t end up using the +3.3V or -12V outputs since I seldom use those values.

Now I can save on those batteries when building circuits. I’m also hoping to be able to use the +5V source to power 4 or 5 servos for a robotic arm project I am working on. I have to test the current to make sure it’s not too much or too little for the servos.  Any suggestions are appreciated.

One black wire and one red wire are connected via a power resistor.
One black wire and one red wire are connected via a power resistor.
Often times, people use switches between the black wire and green wire.
Often times, people use switches between the black wire and green wire.
It is important to shrink wrap or tape off unused wires and securely bundle out of the way.
It is important to shrink wrap or tape off unused wires and securely bundle out of the way.
To maximize current, use all of the like-colored wires.  If you are concerned about current draw you can use one or two wires.
To maximize current, use all of the like-colored wires. If you are concerned about current draw you can use one or two wires.

Once the black (ground), red (+5V), and yellow (+12V) wires are bundled, They are soldered to end of the binding posts.

For my next project, I might try building an AC to DC power supply using a transformer and bridge rectifier.  JumperOne has a tutorial on that also!

Happy Building!

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