Questions tagged [atx]
ATX is the standard for PC power supplies. It has +3.3 V, +5 V, and +12 V. They share a common ground. It has a PS_ON# signal which needs to be grounded to turn it on. Don't open power supplies that run on line voltage (AC). They have dangerous voltages and currents inside
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Maximum capacitance on 12 V ATX PSU
I'm designing a fan controller for a PC. It will be controlling 6 fans. I want to start initially with 100 µF tantalum capacitor for each fan. Can 600 µF capacitance on the 12 V line (4-pin, 5.08 mm ...
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DIY 12V computer UPS
I am considering making a 12V UPS for an ATX computer. I would like to know if my concept is sound, (at least halfway so :) )
It's insane that commercial UPS rectify+step-down mains to charge a 12V/...
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Detect if PC power is on/off then turn a TV on/off using an Arduino
I'm building an arcade cabinet using an old PC and an old(ish) Bush LCD TV as the monitor. The TV is connected to the PC graphics card via HDMI and all is good. However, the problem is that I want the ...
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ATX PSU load sharing and failover design
I'm trying to arrive at a solution for lower cost ATX power supply which will supply about 250W, has two separate inputs each capable of supplying the full load in case of failure/disconnection but ...
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Is it safe to keep PS_ON grounded?
I want to disable the 'soft power off' feature of an ATX power supply. So I think of connecting PS_ON and GND with a tweezer and keep it. But when the motherboard wants to shut down and sends high ...
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Switching ATX PSU with a NPN transistor controlled by a 12V signal
I searched everywhere but I can't find a circuit to turn on a PSU with a 12V signal.
I know that PS_ON has an internal pullup but its value may change by vendor.
So I don't know if I can use this ...
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Detect power/run status of PC in hardware
This may well be a daft question and/or a failure to google effectively (and apologies if this would be a better fit on SuperUser or somewhere else?) but is it possible, in low-level hardware, to ...
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Connecting PSUs in parallel
It's certainly have been asked here but answers seems mixed. So for my project I need to power an ATX motherboard with extra 3.3V rail (there's a separate connector on MB for this). I will be using ...
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Can I plug a Raspberry Pi Pico (5 Vdc) to an ATX 2.4?
I have a Corsair SF450 (ATX 2.4) not connected to any PC motherboard; however, I believe it's providing a 5 VDC supply to the mini-USB, by the ATX pin 6 or 4 for (+) (https://en.wikipedia.org/wiki/ATX#...
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ATX power supply - switching PS_ON
I need to control two computer power supplies so they turn on and off at the same time. Since the primary power supply doesn't use a standard ATX motherboard connector, I can't just splice the PS_ON ...
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Where can I get +5VSB from a motherboard?
I have a computer I'm using as a server, I would want it to turn on on its own when power is cut off, and I figured the easiest way is to connect a micro, maybe an attiny85, that will short the power ...
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Power switch for 8Pin ATX Connectors
What would be the best way to make a power switch for the 8-pin ATX Power Connectors? Can I just join all the yellow (12V) wires together and then use a high current switch to toggle them ON/OFF? Also ...
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Driving 5V logic output to 3V3 logic input and an LED simultaneously
Background: I'm attempting to control an ATX power supply. I want to read its 5V power good signal and send it to a 3V3 Raspberry Pi Pico GPIO input, and simultaneously power an indicator LED.
I think ...
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Step-down converter in an ATX PSU, why?
I was recently looking at a 500W PSU schematic, and found out they used step-down converters on 12v and 5v output. Schematic is attached(pls see hi-res at https://ibb.co/nbDRJPq)
The D2 diode charges ...
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Playstation 2 - power supply 12 V pins
I have a 110 V Playstation 2 which I've been using for more than 10 years with the help of a 220 V to 110 V step-down adapter. The problem is that the step-down adapter has gone bust and the ones ...
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