Re: AC on DC side of PSU?

I took my multimeter with me to work and tested a normal hp psu from one of the hundreds of computers here.
First I tested with no ground wire, and it was outputting 46 volts at a fairly high 38hz. Then I changed to a grounded outlet, and it completely vanished!

So you guys are right. It's the missing grounding. Maybe this is something I should do something about. If it can make a led glow, it can also break stuff.

Re: AC on DC side of PSU?

Addon - in case it's important, I might want to mention that there is no earth in the socket. It's not the newest house.

Hello. The other day I was testing some led's that I intended to use on a new (hopefully) fashionable lid for my computer case. I tested one of them using a resistor and a power supply. But I hadn't even attached the led when I noticed something odd.

When my powersupply is switched off (but plugged into the wall socket), there's an AC current running between me and the ground wire of the power supply - and between me and the 12v wire I meant to use as well in fact.
I tried this with two different power supplies I had laying about (an antec 380w and a modular 620w corsair)....