I tried searching/asking around but havent been able to find an answer for this, so here it goes. I have a supply voltage of 125v, and want to use that to power some leds. I know resistors would get too hot for this right? So what could i do to run those leds? Using a standalone battary is an option, but I would prefer not to do that. Thanks.
You wont find any...at least not cheap. You could just get a wallwort that changes it to 2-4 volts for normal leds.
I know I already suggested using a spare power brick. maby this would help - http://www.onsemi.com/site/products/summary/0,4450,NUD4011,00.html?tax=197
Look at this. As well as this. I don't recommend utilizing it without isolation and current limiting.
Thank you all, but I think il just go with a battery as mobius9 suggested. This is for a powerstrip mod, which will be powering my computer and maybe more at lans, so I got no mess-up room