goto radioshack. you need a thing they call reverse voltage converter as for people in the US, it's reversing voltage stepping it DOWN not up, lets you plug stuff that runs on 220-240V into 110-220V outlets in the US. The real name for it is a step down converter I don't know why they call it "reverse voltage." They have the opposite too and it's way less expensive, the thing for plugging US stuff in in Europe. But what you need is: sku #273-1411 for $43.99 USD (29.99 GBP) (about 35 EUR). If you got the standard double round continental European plug that's all you need. If you got UK you just buy the UK plug converter, which is cheap and sold next to it in the store. Clear packages so you can match the stuff up before you buy it. Pretty much anything you can think of unless it's super high watt like a space heater will work just fine in that thing.
Yes plug something from the USA in in the UK for example with just an adapter to change the plug and not the volts, you get a blowup. Plug something European or British in in the USA, you get nothing. Maybe possible static electricity damage because you're not sending enough current through it, but more likely, nothing...
