The ATX PSU was too small. I had to install the 1A load on top of the case.
Today I decided to convert the Bench power supply I made before for PSU of RAMPS 1.4 controller.
I removed the 5A fuse and installed a fuse holder that takes 5A fuse backside of the case.
Raprap Wiki page about power supply recommends intalling 47 ohm resistor between the green wire and ground wire. I didn’t have 47 ohm and was lazy. So I made 50 ohm resistor by connecting two 100 ohm resistors in parallel.
+12V (yellow) and +5V (red)wires.
1A dummy load for +5V rail was made out of two 10W 10 ohm resistors.
The 50 ohm resistor installed on the green wire that is connected to the front power switch.
I soldered one pair of orange wires (+3.3V) which described on the above wiki page.
Checking +12V and +5V
It was producing positive 12.30V and 5.15V.
Five banana posts obstructed the fan so I moved it outside.
Made +12V power cable using 16 AWG and finished the PSU
YF2-4, 16-14 AWG, spade terminal
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