How to power a strong Electromagnet?
I live in an apartment building near some students and someone egged my window. The egg dried in and now I can't reach it to clean it.
I've see magnetic window cleaners before but they are cheap, weak and not up to task so I'd like to make an electromagnet to help with the scrubbing action.
The windows are double glazed and the neodymium magnets I have are not strong enough.
The only electromagnets I've ever made were the basic science experiment type, coiled copper around bolt with a battery to power.
For this I assume I'll need a large battery or would it be mains powered?