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Hacking PC ATX Power Supply The power supply is without doubt one of the most underrated PC, but can be very rewarding. In this article I will show you how to simulate a motherboard to run an old ATX power supply.
I've got a used a PC that I decided to throw away, so do not use a power supply pc you want to use.
- Tips
First disconnect the power from the power supply to work in safety.
If the power comes from a very old pc I suggest you vacuum the dust that is ten years into the case. The mixed powder moisture can be very damaging to the circuit, also if you are allergic you risk being sick.
start
The power supply is essentially this:
- with 2 types of connectors, a type that plugs into the motherboard (ATX connector) and a type that connects to devices (HD, CD / DVD etc). the ATX connector wires come in various types of colors, the green wire (or gray in some, but rare cases) is what interests us. In fact you have to solder a switch between this cable and a black wire (GND).
In this photo you can see my solution. Cut the connector and ATX power supply and open the case, I could put a switch and a LED that shows me the power supply work. The LED is - collegado a red (+5 V) and a GND through a 10K resistor, so to limit the current and lengthen the life of this component. Before you cut the ATX connector on board to look for two pairs of wires formed by a cable and a cable more often orange orange finest. Put some 'scotch on couples in order to recognize them later. Cut the cable or ATX cable and soldered together often and the end of the orange pair.
The power supply still will not work because it needs a little load (as one switching), I did my tests with HD, which I later replaced with a fan.
I recommend the fan as a load because it is very useful, for example, when you suck in the welding fumes from soldering.
Now you'd have a tangle of cables in hand and a fan running, but do not be discouraged, you have it almost done.
know that the colors of the cables comply with these types of voltages. + 5V, the typical cable color: red
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+ 12V, typical color cable
:
yellow
- + 3.3V, typical color of cable
:
orange -
- 5 V, the normal color of the cable :
white -
- 12 V, colore tipico del cavo : blu
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+ 5 Vstby , colore tipico del cavo : viola
Ora starà alla vostra fantasia creare un' interfaccia che utilizzerete per connettere questi cavi ai vostri circuiti. Personalmente ho optato per una soluzione "audio", utilizzando un pannello di rca e saldandoci i cavi dell'alimentatore. -
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Non è molto aesthetically beautiful, but the important thing is that it works. If you want to put everything in a wooden box, improving the aesthetic side. Also adding blue LEDs all'interndo of the case, you will create that effect tamarro that there is always good: D. .jpg)
Final Solution & & test Arduino Mega Through the standoff have attacked the panel grilled top RCA adapter.
With +5 V we can nourish our Arduino boards, not a burden more sull'usb pc. The first test I did with the classic sketch Blink and it works.
A PC power supply, it is theoretically capable of powering up to a hundred Arduino boards. .jpg)
Before you throw away a computer check that there are no pieces in useful for your future inventions. I will not be responsible for whatever happens to you or your power supply if you decide to follow this tutorial.
know that the colors of the cables comply with these types of voltages. .jpg)
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Before you throw away a computer check that there are no pieces in useful for your future inventions. 
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