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Computer power supply question

Mopac76

Oct 29, 2021
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Oct 29, 2021
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I want to power two 24v 50watt halogen lamps from a computer ATX power supply that I have rewired to provide 24volts output. The power supply shows that the +12v circuit is rated at 20amps and the -12v circuit is 1amp. What is the maximum load across the 24v that I can use?
 

bertus

Moderator
Nov 8, 2019
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Nov 8, 2019
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Hello,

As the -12 Volts is only 1 Amp, you can have a max load of 1 Amp, so 24 Watts.

Bertus
 

Kiwi

Jan 28, 2013
432
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Jan 28, 2013
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432
You could try a DC voltage step up module from Aliexpress to boost the +12v to the required 24v for the bulbs.
 

dave9

Mar 5, 2017
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Mar 5, 2017
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1,180
^ Or just get a mains voltage to 24VDC adapter and do without the computer PSU instead of a second regulated stage which probably drops efficiency and adds bulk.
 
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