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37 Threads found on Atx 12v
I bought a atx computer power supply last year to make a power supply for hobby electronics. And while using it, I got curious of how much -12v rail would push. It said 0.3A, but I tested it with a multimeter anyways, and got around 6~8A. It wasn't stable and after 2~3 seconds, it made some popping sound and shut down. The symptoms are : When you
Connecting power supplies in series is quite common, there should not have any impediment on this at the atx power supply. The only remark is that perhaps you should ensure a minimum load at the 5v. If I'm correct, the 12v control is took from the 5v reference.
I need for my tests some good quality power supply. I have 12v 2amp, 3amp etc. and few boost converters. I recently found my old atx power supply , Odeyssey 400watt atx power supply (dated OCT 2005). I thought may be if I could repair it without much effort it is worth keeping as an additional power supply. ( I have plans to take 5-8 (...)
USB power is a POOR choice for 12v Peltier 92W device even if you boost voltage. USB is clearly for low power devices such as 1W unless special communication and/or USB3 port can get 4.5W However, any old PC atx can supply this from IDE or HDD plug.
The pico PSU is favourite device for fan-less PC. I have collected ebay data to see the volt and AMP needed to make One. Now i grabbed a Buck circuit with flexi voltage conversion via zener selected . This is Ckt-A And for the little -12v line Ckt-b is selected I am sure being a newbie there may be lot mistakes . Doubts
You can look for a 110V input atx supply. These are common with 18A output. Some have a 110V/220V switch. That will not work with DC input.I bought a 12v/18A supply from market for Rs.950 from market recently with an input range of 90-250V. I think it is for Play Station. You can make a simple inverter supply of 250W with iron core. .
500W @12v ~45 A , D3 must be rated for this current, also it will drop .7 V so output on atx will be 12 V - .7 = 11.3V, power in D3 ~ .7 X 45 = 35W, it needs a heatsink. Likewise D1 and D2 dissipate 35 W between them, hence must be heat sinked. I suspect your SSR will drop volts and so that will have to be heat sinked. You must specify a type numb
The molex connectors are rated for 12v only. Dont' know which you mean, but "5.08mm Pitch Disk Drive Power Connectors" are e.g. rated for 250 "Mini-Fit Jr" connectors used with atx power supplies have 600V/6-9A rating (depending on the number of circuits) So problem with this kind of connectors is current, not volta
... I need an atx power source ... what exactly do you mean by this ? Does this mean that you need to convert a 19-60vDC to multiple outputs @ 3.3v, 5v, +12v, -12v ?
The modification in the above circuit effectively redesigns the TL494 circuit to achieve constant I/V operation. I didn't calculate the dimensioning but I presume it can be adjusted to work stable. Beyond the scope of this thread, I wonder if modfication of atx supplies is the best way to make your own supply. I saw this circuit before
atx boards supply the CPU DC/DC converter through a dedicated 12C 4-pin connector. Do your measurements refer to the 12v node current?
only the +5V supply on an atx supply is capable An atx supply according to the atx Power Supply Design Guide has similar current delivery for 12v and 5V rails. This is due to the fact that both CPU core and high performance graphic cards are supplied by 12v. There are two 12v outputs that (...)
Hi all I have the mobo GA-8N-SLI-royal and i would like a help. The problem: I connect the 24 power supply connector, the atx 12v 4 pins connector, and the 12v/5V 4 pins connector. I took off the CPU and all the RAM's, I/O cables etc. The CPU FAN blower in connected. Then i push the power button and the Q23 (MOSFET K3918) starts (...)
You already have 24V in any atx PSU.. Any modifications to PSU will void warranty. Most PSU's need a 10% pre-load of rated current on main supply to keep it stable but if already connected to your PC, just tap into the +12 and -12v pins. If standalone.. dont forget to jumper the POWER On to ground. 75423
Dear All, I want to design a Battery Charger 12v 6-8 A I want to make a switching supply using 350W atx Flyback transformers. My problem is i can't use PC supply as it is please tell me how do i make power supply from PC Supply components.
Hi, i want to add a +14V terminal to an atx(450W). i want to use the resource of the same atx even if that requires an external circuit. it may require some changes in the main transformer section. maybe by changing the transformer and adding additional circuitry. can someone help with schematic. plz let me know the changes required th
can you connect atx/atx 12v output to 5v output of another atx supply or are there gnd problems?Unscrewing PCB off the case makes gnd float (floats anyway when you plug it in the 2 pin wall socket) and possibly each will set its current to Vtotal/Load and regulate just it's own output voltage-i.e what kind of small signal (...)
If the voltage comes from an atx power supply why not use the +12v rail instead? But I think it will still need more current than one +12v rail will give you (due to safety rules that impose a current limit on each rail).
anyone please tell me what should i do for the following: i just need a 100A 12v psu. For light weight and easyness, i'm planning to use atx PSUs. These are SMPS right?? Now I have PSUs for @ 12v, 20A Max. So I can use 5 PSUs tied togather in a buss-bar. So total 12v 100A. Right?? i mean so simple... tie all of the (...)
Hi there... I am going to use my spare atx psu for my mobile rig. I'm running a Motorola gm300 which thakes around 7-8A white TX. Thus as a psu, i used the 12v (PSU is rated for 10A@12v). yellow and black cable. now i also connected the pin 14 and 15 with a toggle switch to bypass the motherboard ON/off. when i power it up and press the (...)
Hi, How do I can get 5,00V x 20A with remote voltage sense terminal and using a PC AT or atx smps? Usually this psu have an output voltage of about 5,10V up to 5,30V! I'll not use +12v, -12v, -5V, 3,3V and remote ps on only power good output
Hi all, anyone have atx power supply circuit with 12v supply? Please help me on this.. Thanks in advace... rgds, aghielan
How do I build a filter inductor with 600uH of indutance and rated 10A using a PC-atx power supply filter inductor core (the rounded one yellow that filters +5V, +12v, -12v, -5V output)? I need know the number of turn and wires gage(I guess a set of three or four to avoid skin effect). This will be used as output filter in a russian (...)
How about using old atx SMPS ? Regards, IanP
I have an atx power supply that has as 10 amp limit on it's +12v line and a 500ma limit on it's -12v line If I use -12v as a 'ground' to get 24 volts what kind of results am I going to get with varrying loads? I know at some point the voltage is going to drop but I can't seem to make sense of it intuativly. Also what are the (...)
Hello. Does anybody have any idea, how to build an 200w atx power supply for PC? I need +3.3v, +5v, +12v, 5VSB output. I found a website which is However some technical data of inductance T1, T,L1,L2,L3,L4and transformer T2,T3,T4,T5,L6 are missing.Can anybody tell me what are the values for those compomen
hi........can anyone help me:cry:. im trying to fix my PC in my car, i need a 12vDC-DC atx powersupply which can produce -12v,+12v,-5V,+5V,+3.3V,Gnd.
I am looking for an schematic of a power supply for atx PC that input is only 12v DC. Thanks.
Here is the schematic of an atx PSU: As you can see there is a feedback path from the +5V and +12v outputs - maybe you could modify your supply and route them to your load instead. Use shielded wires. If the electrical noise level is very high you might need to build a differential sense circuit o
I found this picture somewhere and i would like to know the names of this chips. They are dc-dc switchers. I know only the specifications of the whole circuit: Input voltage: 9-16v Output voltages: 12v 3A 5v 10A 3,3v 10A -5v 1A -12v 1A 5vsb 1A power good 5V This circuit is a car atx power supply
I'm attempting to use my xbox as a car pc and would like to build a 200w dc atx psu which i will then modify to suit xbox. So input of 8v to 16v required and o/ps of 3.3v, 5v , 12v needed. Does anyone have any good places to start learning. I know a good bit already but i want to master this subject and not just copy someone elses work. Any r
Hello I have a atx power supply from a broken PC. I'd like to use it stand alone, but I don't know wich load I need in +5v-gnd or +12v-gnd to get these exact voltajes, otherwise... I get too much high values and I don't want to limit the current using DC-DC regulators. Do you know which resistor value I need to simulate the mainboard loading?
This project was released by mcds To change 12v to +/-30V 250W mdcs used components from old atx power supply especially BUZ11, diodes, transformer, choke and caps Acoustic filter was created on NE5532 After first run we need select working frequency of MN3101 for it we use potentiometer 10k and setup max current 200-300mA (without amplifier TDA
Who has already made a atx power supply from a 12v DC source (from a car sigarette plug)? How do you handle it? Roel
When this PSU started from MOBO it is atx type and can started if the PWR_ON pin is on GND.Without modification not recommend for hobby-works, and before starting apply a car bulb 45/50W to 5V and 12v output as Moss wrote.
Pin Name Color Description 1 PG Orange Power Good, +5 VDC when all voltages has stabilized. 2 +5V Red +5 VDC (or n/c) 3 +12v Yellow +12 VDC 4 -12v Blue -12 VDC 5 GND Black Ground 6 GND Black Ground see i do not know if this is standard but atx ps usese this regards