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zakruti.com » Knowledge, science, education » GreatScott!
HACKED! : ATX Power Supply with Variable Output Voltage?

HACKED! : ATX Power Supply with Variable Output Voltage?

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Rating: 4.0; Vote: 1
HACKED! : ATX Power Supply with Variable Output Voltage? umloginqualquer: Hi Scott. A few years ago I have done the same modification as you did, and I consider the result a full success. Although the voltage range is limited, it varies enough to make the bench PSU useful for my purposes.
However, I understand why you disencourage your readers to do the same. The risks of dealing with 240vac is immense and you don't want to be responsible for people risking their lives, specially when forgetting to discharge high voltage capacitors is a common error even among professionals. You are right and I agree with your stance, BUT for those who actually have the skills and knowledge and responsibility to safely do this modification, I think it's totally worth it. It's a nice project, easy to do, fun and rewarding to see it working in the end.

Date: 2020-09-05

Comments and reviews: 9


I have a question (which I hope gets an answer on a 3 year old video, I've seen a number of videos converting ATX PC and Server PSU's into bench supplies etc. I have recently done a conversion myself but this was to simply turn a PC PSU into a multi USB charger using the 5V rail to charge 20 devices at a time 1A. What I would like to know is could I convert the 12V rail down to 5V and expand the capacity even more?
I realise I could use a buck converter but is there a better / simpler way?

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You take great pride in your Penmanship. This shows every time you put pen to paper. The same is said with the quality of your projects. Every detail, every component, every finishing touch.
This speaks volumes and it's something that so many have lost. Everything we do is like signing your name, this is the lesson I try to teach my son. I am glad to see you trying to show so many others the value of this very important lesson.

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Video in short:
-Making workbench power supply From ATX PS
- but we want variable voltage
-adding buck/bust converter?
- too much space
-Maybe hacking ATX supply?
-Too complicated and dangerous
- -them use boost and/or buck converter for couple max and extend original housing or make bigger-
-buy Power supply for 50
-PROFIT!
oh wait

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Hello great Scott.
Even if we connected the ATX green (stand by) wire to black (ground) wire it would still not work as there is load in the computer power supply.
How did you get around and about that. Mine is not working and I have cornfimed the color codes for the wire are ok

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yeah. fuc buying. i want to build it myself. :) bonuses: extra learnig + extra practice and manuality in calculations and using tools + the self sh1t about building sh1ts by myself: D. thnx anyway, i trully enjoy videous were i see: dont do that, its not worthit: ) thnx man
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Great GreatScott! Thank you!
Small notation: please never left unconnected side pin of variable resistor (potentiometer. 04: 45 and 05: 55
Short it to central pin always!
It will keep your load (sometimes very expensive) safe of short voltage spikes out of range.

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i have a power supply like that but it has a problem, the problem is that the power supply as soon as I short the green with black wire it start for a second and stops instantly. anyone know what is this problem?
and how to fix?

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Hey Great Scott, the blue wire is rated at - 12V. Therefore you will get a voltage difference between that and the + rated lines up to 24v when paired with the yellow +12v line. I use it all the time for projects.
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wanted an variac for my bench power supply, can you do something about it for an diy version? because i love the way you explain the theories, i have binged almost all of the videos, but nothing helped me out
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