My father in law came by an old siren, the kind use by volunteer fire departments to call people in. He wired this into his workshop alarm system after getting broken into and none of the neighbors paid attention to the alarm. He also wired saws, most of his power tools to come on. I dont know of anyone trying to break in after taht but he showed it to me by setting the thing off while I was in the shop. Imagine lights going out, siren, in the shop, coming on and saw, planers and shapers all around you starting up. No guards on anything. I would have been laughing my ass off if it had happened to someone else except I realized how close I came to sticking my hand in a radial arm saw after he turned the lights on.
Jimmie
Jimmie