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How do I restrict a PSU's current output?

38034580
By 38034580
in Power Supplies
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Posted

I am using it to power some 12v electronics with low amps. If they try to draw as much amps as possible, the wires heat. And if wires touch, I want to lower the risk of fire. How do I prevent a PSU from putting out high amps whilist leaving the voltage at 12v? Same for 5v?

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Wiring in a fuse to your voltage rails is your cheapest option.

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Posted

replaceable fuse with its socket is probably the cheapest 

or for the more complicated and "expensive" way is you can get arduino for disconnecting the circuit if the current reach your desired max output and also for monitoring the amp

01110100 01101000 01100001 01110100 00100000 01110111 01100001 01110011 00100000 00110111 00110000 00100000 01101001 01101110 01100011 01101000 00100000 01110000 01101100 01100001 01110011 01101101 01100001 00100000 01110011 01100011 01110010 01100101 01100101 01101110 00100000 01110100 01110110

 

 

 

 

 

 

 

 

 

 

Audio Interface I/O LIST v2

 

 

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26 minutes ago, James Evens said:

That's not how electricity works.

Fuse? no. A fuse is there to prevent catastrophic failure for example this thing  starting a fire and not for current limiting.

A magical device? no. If make a current limiter the voltage will drop so the current limit isn't exceeded. 

 

So the only option is to make sure your 12V load isn't pulling more then it should.

 

true is not for current limiting but its a cheap option to prevent or kill power to a circuit that drawing more than a certain amount of current the fuse is rated at

 

fuse.jfif

01110100 01101000 01100001 01110100 00100000 01110111 01100001 01110011 00100000 00110111 00110000 00100000 01101001 01101110 01100011 01101000 00100000 01110000 01101100 01100001 01110011 01101101 01100001 00100000 01110011 01100011 01110010 01100101 01100101 01101110 00100000 01110100 01110110

 

 

 

 

 

 

 

 

 

 

Audio Interface I/O LIST v2

 

 

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9 hours ago, 38034580 said:

I am using it to power some 12v electronics with low amps. If they try to draw as much amps as possible, the wires heat. And if wires touch, I want to lower the risk of fire. How do I prevent a PSU from putting out high amps whilist leaving the voltage at 12v? Same for 5v?

STOP. Honestly, stop. I've looked at your posts. You are doing things you do not have the skills to do. You are risking injury and fire. Please, stop trying to power things with a standard ATX power supply. Get the correct power adapters, or seek assistance from an electrician, or electrical engineer who knows what they are doing, 

I'm not saying this to be rude, I'm saying it because I don't want something bad happening. 

"Any sufficiently advanced technology is indistinguishable from magic" - Arthur C. Clarke
Just because it may seem like magic, I'm not a wizard, just a nerd. I am fallible. 

Use the quote button or @<username> to reply to people | Mark solved troubleshooting topics as such, selecting the correct answer, and follow them to get replies!
Community Standards | Guides & Tutorials | Troubleshooting Section

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-= Topic moved to Power Supplies =-

Please start posting your topics in the correct section.

 

Also, 

-= Topic Locked =-

I 100% agree with this.

1 hour ago, SlayerOfHellWyrm said:

STOP. Honestly, stop. ...<snip>

I'm not saying this to be rude, I'm saying it because I don't want something bad happening. 

What you are wanting to do with PSU's are not in line with what PSU's are designed for.

 

Further topics with question about how to modify your PSU outside its intended design and use will be Locked or Removed.

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