A piece of iron ordinarily will be attracted to a magnet, but when you heat the iron to a high enough temperature (called the Curie point), it loses its ability to be magnetized. Heat energy scrambles the iron atoms so they can’t line up and create a magnetic field—this Snack is a simple demonst...
ok...this is the principle of a seismic detector...you see on 2 parallel rails, two counterweights...when they meet...the alarm fires...what the PIR relay is doing is controlling the capacitors...right? ...so, my idea, goes, to capacitors are burn...the alarm is burned...or...you have to invent a counterweight connection...like...putting a 50 kilos weight on one side up the door...and another down on the opposite side