c/showerthoughts · by xia@lemmy.ca · 136d

If you reverse the polarity of a fire-alarm, you get a fire-starter.

89 points · 17 comments · view on lemmy.world

17 Comments

IcedRaktajino@startrek.website · 29 pts · 136d (2 replies)

If you reverse the polarity of lots of things, you get a fire starter.

xia@lemmy.ca · 13 pts · 136d

...and likewise, many things stop working during a fire, making them rudimentary fire-detectors.

kernelle@lemmy.dbzer0.com · 2 pts · 136d

AC goes brrrrrr

emotional_soup_88@programming.dev · 13 pts · 136d (5 replies)

I'm no electrician, but attaching the hot and neutral wires of an end appliance to the opposite wires of the power supply shouldn't be a problem on a lot of bare bone, electromechanical hardware that don't have logic units. Please correct and enlighten me, if you're more knowledgeable! :D

7eter@feddit.org · 7 pts · 136d (2 replies)

swapping hot and neutral typically isn't a problem - its alternating current anyway. However, most DC Appliances are sensitive to reverse polarity. Ever tried connecting a electrolytic capacitor the wrong way around? On the other hand many customer appliances have some kind of protection against reverse polarity.

emotional_soup_88@programming.dev · 2 pts · 136d (1 reply)

Thanks! You just nudged me down a fascinating rabbit hole: https://www.youtube.com/watch?v=eflB18WmbjM

7eter@feddit.org · 2 pts · 136d

that's great to hear!

TranquilTurbulence@lemmy.zip · 4 pts · 136d (1 reply)

Something as simple as an incandescent light bulb works either way. LED lights are picky about electricity.

call_me_xale@lemmy.zip · 4 pts · 136d

Individual LEDs, yes; the rectifiers in most LED "bulbs" shouldn't care.

TehBamski@lemmy.world · 12 pts · 136d (3 replies)

MANDATORY Fire-Starter watch/listen

jestho@lemmy.zip · 10 pts · 136d (2 replies)

Twisted...