376
It's Halloween
(lemmy.world)
Finally, i can use this invention!
No you can't. It hasn't been invented yet.
A man can dream, though. A man can dream..
I always wondered why they say "front toward enemy" and not "this side toward enemy". Because some idiot won't know front from back.
I think it's more like "Front. Toward enemy."
“Front? To! Ward, enemy!”
Yet again, punctuation matters.
That's ONE way to tell people that you're a tad introverted and don't appreciate unannounced guests.. 🤷
No power source?
Doorbells are powered. Either it's a hardwired doorbell or there is a battery inside the button. That's enough to set off a charge.
Do they need one? I would have guessed that you just need to short the wires on a real one. But i have no knowledge so idk.
A brief internet search says the signal in the real thing is mechanically generated by pressing the trigger on the hand unit, helpfully called the M57 firing device. So just shorting the wires without external power wouldn't trigger it.
That activates a blasting cap which is installed in the mine when it's placed. I'm pretty sure it just needs one cap to work, but there are two places for them on top - the little upside down tophats where the wires end in the picture. So the one in the image might be wired wrong; both wires would need to go to the same cap on one side.
I don't know if a doorbell has enough juice to activate a blasting cap.
Seems much safer so yeah makes sense. There are doorbells with piezo electric systems so it might work if its the right voltage and if it isnt a complex modulated signal.
this post was submitted on 27 Oct 2024
376 points (97.7% liked)
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