Questions about hot wire foam cutter power supply?
I am building a hot wire foam cutter. I do not know what to do about the power though. I have a 12 volt adapter that plugs into an outlet , just like any ordinary adapter. I'm wondering though, if it shorts the adapter, it will blow the fuse, correct? I'm sure that's what would happen but other hot wire cutters, being sold online, have an adapter you plug into the wall as well. I need some clarification about this. And then, there's transformers. What are they and why are they used on hot wire cutters? Help would be appreciated.