The PSU I'm using says it only has +12 and -12 it has yellow brown and black main wires then smaller little ones would the brown be the -12 volts ? it's a older PSU can i still do this and just miss out on the 3.3 and 5
I'm afraid I don't really know, you'd have to look up the specific pinout for the model of PSU you have (or just measure the voltages with a multimeter). If it only has yellow, brown, and black wires, it's not an ATX type supply, so I'm unsure what the colours mean (black is almost definitely ground, but I can't tell you anything past that). If you can figure out which wire corresponds with which voltage, it should be perfectly usable as a 12 V supply. You can also use the -12 V and 12 V lines to make a total of 24 V (note that you probably can't draw much current here, since -12 V lines aren't often designed with high power in mind).
as he said in the video: you could make 24 volts with really low currents or 17 volts or 15 volts. Voltage is the difference in potential between two points meaning that you have to check the distance between the two points: -12 is 12 away from 0 toward the negative direction and 12 or 5 or 3.3 are all toward the positive direction so the distance between -12 and 12 is bigger than between 12 and 0 so you can make higher voltages
It's generally not very efficient to charge a 12v battery with a real 12v power supply. Proper battery chargers, despite saying 12v on the box, are actually around 14v, seeing as you need a bit of an overvoltage to properly charge the cells. It's definitely a better idea to get a proper battery charger rather than using one of these.
I did something very similar. I use mine mostly for electro chemistry. The 3.3v is the most useful output.
I made this and it worked perfectly! Thank you so much for the tutorial!
thanks, you're a life saver!
Thank you, it worked perfectly!
The PSU I'm using says it only has +12 and -12 it has yellow brown and black main wires then smaller little ones would the brown be the -12 volts ? it's a older PSU can i still do this and just miss out on the 3.3 and 5
I'm afraid I don't really know, you'd have to look up the specific pinout for the model of PSU you have (or just measure the voltages with a multimeter). If it only has yellow, brown, and black wires, it's not an ATX type supply, so I'm unsure what the colours mean (black is almost definitely ground, but I can't tell you anything past that).
If you can figure out which wire corresponds with which voltage, it should be perfectly usable as a 12 V supply. You can also use the -12 V and 12 V lines to make a total of 24 V (note that you probably can't draw much current here, since -12 V lines aren't often designed with high power in mind).
i just got the notification for this ya its some knock off weird psu i just use the 12 volt line and it works perfectly !! @@ScrapScience
Great! 👏
Also what could I do with the -12 volts :D
as he said in the video: you could make 24 volts with really low currents or 17 volts or 15 volts.
Voltage is the difference in potential between two points meaning that you have to check the distance between the two points: -12 is 12 away from 0 toward the negative direction and 12 or 5 or 3.3 are all toward the positive direction so the distance between -12 and 12 is bigger than between 12 and 0 so you can make higher voltages
thank you ! i need the amps so i found the -12 to be rather useless i have it tapped off and just use the 12 volts for my projects !
Can i charge my 12 v lead acid battery with this psu
It's generally not very efficient to charge a 12v battery with a real 12v power supply. Proper battery chargers, despite saying 12v on the box, are actually around 14v, seeing as you need a bit of an overvoltage to properly charge the cells. It's definitely a better idea to get a proper battery charger rather than using one of these.
I dont get how you make the 0 volt thing
can someone explain plz
its the negative ofc its going to be 0 volts because the volts from the positive needs to go somewhere
Is this safe?
Provided you don't go poking around inside the PSU itself, and you've got a good understanding of what the wires and voltages mean, then yeah.
@@ScrapScience 12v + saltwater shocked me a couple times