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Computer Power Supply
Replacement: None. We do not have a direct replacement for this, it has been discontinued. This page is for reference only.
This is a very standard 350W ATX power supply. It's got a 20+4 main power connector, an SATA power connector and four peripheral connectors. This power supply also has overvoltage and overload protection.
The input voltage is 115/230 VAC (@50/60Hz), and a standard PC power cable is included.
Why is SparkFun carrying a computer power supply? Because it works great with our ATX Connector Breakout Board! Pair the two together and you have a cheap, but very useful bench power supply, which can source 3.3V, 5V, and ±12V.
- Connectors:
- Main connector (20+4Pin)
- 12V (P4)
- peripheral
- SATA
- Floppy
- Input current: 12A @ 115V, 6A @ 230V
- Output:
- +3.3V@20A
- +5V@30A
- +12V@15A
- -5V@0.5A
- -12V@1A
- +5VSB@2A
- Low Ripple & Noise
- Overvoltage protection
- Overload protection
- Short circuit protection on all outputs
- Reset table power shut down
- Complies with FCC part 15 subpart J Class B at 115VAC
- 100% burn-in under high ambient temperature (50°C)
- Vacuum-impregnated transformer
- UL, TUV, CB & CE approved
- 5.75 x 5.5 x 3.25" (WxLxH)
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Would the 12 volt output for this power supply work using a easy driver powering a Nema 17 Stepper motor?
"Short circuit protection on all outputs"
"Overvoltage protection"
"Overload protection"
The protection is blowing up the transistors inside? What outputs are protected? My faulty PCB with a ATX power connector wired wrongly caused this PSU to get on fire... cool :S :S
I've buyed this one because of the protection, but it seams to be just another cheap PSU :'(
RIP power supply :'(
Like most PC hardware, it protects the fuses by blowing up transistors.
overload protection huh? well somehow i killed it whilst copper plating. also when i opened it up to look for fried chips, i noticed the fan was unplugged. that would explain why the fan never turned on!
I modded a computer PSU to power my Reprap and for breadboard power. I highly recommend doing so. I would also recommend buying from Sparkfun, I bought a similar unit from a local pc supply store for about twice as much.
FYI, I used this site as a guide, it's less of a tutorial, but has lots of good info. http://web2.murraystate.edu/andy.batts/ps/powersupply.htm
What size screw fits into the 4 holes in the back? Is it 6-32?
I don't know what the actual threading is, but it should work with the hex+Philips screws you can find by the bucketload on, in, or around just about any computer or computer supply store
I've actually ran several atx power supplies for days with now modifications. I grounded the PS-ON to enable the supply and had an old pc case fan running off the +5V bus
as MF said, this is an ATX PSU, and it may be that without a load across +5v/Gnd, it will not want to turn on. In the link, it is mentioned that not all units require this Built-in load. Suggested method is to include a 10ohm heavy-duty ceramic resistor, attached to the frame to sink heat. (suggested reading for such a task: http://www.instructables.com/id/ATX--%3E-Lab-Bench-Power-Supply-Conversion/ )
I am in the process of modifying a power supply that my high school's tech department gave me using the same tutorial. Haven't turned it on yet, but I'm almost there.
If this PSU hasn't been modified you'll have to ground the PS_ON pin (pin no. 16, green cable) so it turns on the power on all the output rails. If you don't do so, only the +5VSB pin will have power.