Tagged Questions
3
votes
1answer
93 views
ATX PSU 5VSB + 5V
Is it possible to connect both the 5VSB and 5V pins of an ATX PSU to provide +5V?
I would like to be able to initially boot using the 5VSB, which is always enabled. Once I've completed setup I would ...
3
votes
1answer
213 views
What is the capacity of capacitors in this power supply circuit?
Imagine the following circuit with two capacitors and diodes acting as passive PFC.
My question is what is the capacity of these two capacitors? I mean compared to a circuit with just a single ...
0
votes
1answer
176 views
Atx psu 7v output
What is an easy way to get 7-7.2vdc from an scavenged atx psu? I had thought about using a lm317 but I'm going to need at least 5-7 amps of current, and the 12v-5v split just sounds like a really bad ...
1
vote
1answer
68 views
Embedded PS vs ATX PS, can they used in place of each other?
The embedded power supply in my machine has gotten damaged/weak, It is used for powering only the Embedded Computer/Controller on the Machine. The Embedded Power Supply looks something like this. ...
3
votes
2answers
1k views
Voltage Regulators in Computer Power Supply?
I have a damaged ATX 230WCE power supply unit and wondered if I could find 12V, 5V, and 3.3V Voltage regulators inside. I tried looking in another unknown model psu and only found transistors and ...
0
votes
4answers
6k views
How can I power my 6-pin PCI Express card without using an ATX power supply?
One of my older computers has a 365-watt power supply that, for various reasons, cannot be replaced with a new power supply. I would like to upgrade the graphics card in that computer, but all the ...
2
votes
1answer
267 views
ATX power supply specification question
I read the ATX power supply design guide, and I have a question related to the PWR_OK line specifications.
In "Table 21. PWR_OK Signal Characteristics" I saw the following:
"Logic level high - ...
2
votes
2answers
420 views
ATX power supply max current 12V P8 connector
I'm using a ATX power supply as a unit for my project. The power supply is of the type "be-quiet" straight-power E8 480W with cable management. I cannot figure out how much current can I get from the ...
0
votes
1answer
529 views
Dangers of Old ATX Power Supplies?
I was tearing open an old ATX power supply from one of my old computers today, because it was making a funny high-pitched wining noise.
I noted that several of the components within were starting ...
1
vote
2answers
195 views
Powering a DC to DC power supply that came without an adaptor
I bought a mini ATX DC to DC power supply on eBay to use with a motherboard. Unfortunately I did not notice it came without any kind of adaptor. So what I have is basically two wires, red and black, ...
1
vote
3answers
256 views
Is the flatness of DC output of a typical ATX power supply unit worse than a power adapter?
I converted an ATX power supply unit (Seasonic, 330W) into a standalone power adopter (by adding load, etc.), to which I connect multiple things. When I plugin a computer and a monitor each to a 12VDC ...
1
vote
1answer
389 views
building a variable bench supply using microAtx 24pin atx then using attiny44 as voltmeter
Ideally I should have a bench supply so I don't have to keep buying 9v batteries. I've taken a micro atx psu out of a pc I have. It has a 24 pin ATX connector. I'm not going to take apart the psu ...
1
vote
3answers
283 views
Use PSU as replace for broken source +12Vdc 3.33A?
I need 12Vdc 3.33A source power for Silicon Graphics 1600sw display, I have two ATX computer power supply. Is it possible to use these PSU as replace for broken 12Vdc 3.33A adapter ?
UPDATE: I ...
6
votes
1answer
2k views
How to use an ATX Power Supply for my own experiments?
I've been trying to turn on an ATX power supply I had lying around and I plan to use it for some electronic experiments. Note: I don't want to have to open up the PSU for any reason.
What I've tried ...
1
vote
3answers
7k views
24V 3A from ATX power supply?
I am looking for a cheap way to get +24V DC max 3A from computer power supply. I prefer easy soldering solution like DIP, and standard components that do not need to be purchased over internet. Any ...
5
votes
2answers
412 views
What's all this “rails” nonsense on a computer power supply?
This is in danger of becoming a computer question, but I've always wondered why do computer power supplies have so many 12V "rails". I have a 800W dead supply with four 12V 16A "rails", but ...
4
votes
2answers
954 views
Fixing an ATX PSU
I have an 800W ATX power supply given to me by a friend because it doesn't work any more. It's quite a beast and would set me back a considerable amount new, so I'd like to see if I can fix it.
Well, ...
