Psu >> cheap, low running cost power supply

So... Gonna turn my first psu in a low cost power supply for my projects.
Found this beauty, only 250W and has the description of all wires with Amps...
Nice :D

Note 2 things about PC PSUs:

1. Output ground is connected to mains protective earth. This can influence your measurements or circuit (via ground loops). If ypu're not careful, it can also easily short something.

2. Normally, they need a minimum load on some rail for the voltage regulation. That rail is probably the 5 V rail and you should load it with a power resistor drawing a current of maybe half an amp to an amp, otherwise the other output voltages will not be stable. Check their stability under load nonetheless, maybe your PSU is different.

@7400 thanks for the tips.
I have to place the resistir in any (yellow) 5v line? Or a specify one? And what resistor do you recommend?

12 V is yellow, 5 V is red. They are connected internally, so just choose one (not the standby 5 V, though).

It's been a while since I last used an ATX PSU outside of a PC, so I cannot recommend an exact value. Look around what you have at hand and check if e. g. the 12 V output voltage drops under load. If it does, you'll have to use a smaller-value resistor.

@7400 what? No... Yellow is 5v and red is 12v... But I'll confirm, as I'll be testing every exit. Just needed to know what resistencia I should use..

Well... Fuck it. I'll just mount everything in modules to test voltage... I'll have to use one mini breadboard but the fuckers are so cheap I almost didn't use any of the circuit bases I bought

@GyroGearloose: The standard ATX colour scheme says otherwise. Even the label you posted above states 12 V being yellow and 5 V red.

@7400 sorry then... Saw a tutorial for using a psu as power supply and they said red for 12v. Thanks for the warning

Hey man. For what exactly purpose? If you are searching for good PC power supply, 250 watts is very little. I can share a guide for you about how to choose right PSU for your configuration, here is a link - https://inversegeek.com/features/...