I have a joemeek compressor (for music) and wish to power this using a power supply unit I salvaged from an old PC. (in case you're wondering the Joemeek unit was for an internal PC bay and requires the standard 4pin PC power supply to work).
The problem I am having is that I need to 'jumper' the bit of the power supply that attached to the motherboard but not sure how to do this? CAn anyone please point me in the direction of resources on the internet where I can learn how to do this?
Alternatively? Is it possible to power the joemeek just from, say, a kettle lead? I know the PC power supply carries 2black a yellow and a red wire but not sure how to do this, if at all possible?
Hope to hear from someone either way.
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If I recall correctly, the red is a 12v, blacks are ground, and the yellow is a 5v. You could maybe take a 12v AC to DC converter and a 5v AC to DC converter and make your own but you need to make sure it can handle the amps. You could also try an older PSU that has has it's own power switch prior to motherboard controlling it (AT I think).
According to my motherboard manual, PS-ON# is pin 15 on 24 pin connections. PWR OK is on number 8. Not sure which grounds though.
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I should have said I am a novice with this stuff it sounds way too complicated.
Would this however work...if I were to take out the old PC motherboard and cut around the connector (for the power supply) of the motherboard with a stanlet knife then connect up the power supply to the cut down connector, i.e. discard most of the motherboard, and then lump it all together in a home made shackled together project box?
I know that the power supply does power up ok when I connect to the motherboard so I suppose my question is, can I cut away all the bulk of the motherboard and will it still work?
Use a paper clip (bent 180) to connect the green and black cables on the end of the motherboard plug (WHILE THE PSU IS OFF and un-plugged!). They should be the 2 to the left of the little clip on the clip side (rounded edges).
In computer electronics & wiring, this is the following color codec:
+12v = yellow
+5v = red
+3.3v = orange
ground = black
-12v = blue
-5v = white
+5v (standby) = purple
POK = gray
PC-ON = green
So, to run the power supply without a motherboard present, you link the green (PS-ON) wire to any black (GND). I've used a plastic-jacketed twisty-tie with the ends exposed to test PS's... If you want something more permanent, cut the green and a black from the 20-pin ATX block, expose the ends, and either twist-cap them, or get a wire joiner.
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