Computer power supply question

[Mopac76]

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]

Hello,

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

Bertus

 

[Mopac76]

Hello,

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

Bertus

Ok, that's what I was thinking, but wasn't sure. Thanks for your reply.

 

[Kiwi]

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

 

[dave9]

^ 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.

 

[bertus]

Hello,

As @dave9 said, a 24 Volts power adapter will be more easy:
https://www.newark.com/xp-power/ves120ps24/adaptor-ac-dc-24v-5a/dp/98Y4022

Bertus

 

[dave9]

^ I was thinking something less expensive but still major brand like this:
https://www.ebay.com/itm/264846916612