Is it safe...?

  X™ 17:07 25 Aug 2006

Would it be safe to wire a 12v light to a PC, using maybe a USB cable or would it burn out the PSU? I've looked over it, a 450W PSU and a 50w or less bulb. What do you think?

  ACOLYTE 17:10 25 Aug 2006

You dont want to know what i think lol,i wouldnt do it but thats me,as for is it safe i dunno,i dunno even if your USB port would power a 12v bulb let alone a 50watt one.

  X™ 17:14 25 Aug 2006

USB gives out 12v I checked, I'll check again on a different one. I could test it on an old PC.

  ACOLYTE 17:17 25 Aug 2006

Well my USB ports give 500mA per port,i dont know what that converts to in volts it may be 12v i have no clue.

  alan2273 17:19 25 Aug 2006

USB might give out 12v but the amperage is miniscule, so if you connect a lamp to it you will probably wreck the USB ports and possibly the motherboard with it.

  coolkid2 17:20 25 Aug 2006

no it doesnt - it gives out 5v

  X™ 17:23 25 Aug 2006

And I might even put it on a HDD/Optical Drive power lead.

  ACOLYTE 17:25 25 Aug 2006

I think you should buy a torch and leave the pc alone,you may end up breaking the whole lot for an experiment.

  alan2273 17:27 25 Aug 2006

I forgot to say that the amperage drawn from a 12v/50w is 4.33amps so no way will it work.

  Stuartli 17:33 25 Aug 2006

Try the tech support link at:

click here

An alternative might be the small light fittings available for laptops that run off a USB port. See:

click here

click here

  Fruit Bat /\0/\ 17:34 25 Aug 2006

Is it safe...?


This thread is now locked and can not be replied to.

Elsewhere on IDG sites

Best phone camera 2017

Stunning new film posters by Hattie Stewart, Joe Cruz & more

iPad Pro 10.5in (2017) review

28 astuces pour profiter au mieux de votre iPhone