this post was submitted on 17 Dec 2023
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[–] sarmale@lemmy.zip 22 points 11 months ago (4 children)

If you close the circuit breaker can it still shock from capacitors?

[–] paultimate14@lemmy.world 22 points 11 months ago

Slightly. If you were concerned you could bridge the contacts with an insulated screwdriver or something.

It's probably not something I would be concerned about unless this is a more powerful charger. It's too blurry to see but even the large electrolytic doesn't look big enough to be worried.

[–] Slow@lemmy.today 5 points 11 months ago

I wouldn't experiment with such a malfunction when the unit is plugged in. The best solution is to de-energise the house, if you have experience with the electrical panel, and then manipulate to remove the broken parts from the socket.

[–] Trollception@lemmy.world 1 points 11 months ago

Not if the phone was plugged in. The capacitors would drain almost immediately.

[–] PP_BOY_@lemmy.world -1 points 11 months ago

Or just throw down a big rubber mat to pull then out

[–] RegalPotoo@lemmy.world 21 points 11 months ago (2 children)

And this, among many other reasons, is why you don't buy cheap knock off power supplies

Getting harder every day. People think Amazon if full of fakes. As if Walmart, target, Best buy, [big shop here] doesn't also get shitty merch from the lowest bidder.

[–] 1rre@discuss.tchncs.de 2 points 11 months ago

This, among many other reasons, is why you have switches per-plug rather than having to either risk electrocution or knock all your sockets offline while you unplug this

[–] TheBlue22@lemmy.blahaj.zone 20 points 11 months ago (3 children)

Never knew those lads were so... complicated?

[–] henfredemars@infosec.pub 38 points 11 months ago (1 children)

There's a whole protocol for talking to supported devices so they can negotiate power delivery.

[–] refurbishedrefurbisher@lemmy.sdf.org 13 points 11 months ago* (last edited 11 months ago)

That can be done with a single chip. What's actually complicated here is the switch-mode power supply itself.

It's how you get a 90% efficiency vs a 10% efficiency from linear power supplies (transformer, full bridge rectifier, and a big ass-capacitor, then if you need a stable voltage, a voltage regulator, which makes things even less efficient). The benefit of linear supplies is that it's very easy to produce very clean power for analog electronics, but digital electronics have a lot more wiggle room for noise in the power. Well designed SMPS have both low noise levels and also hogh efficiency. Those are more expensive :P.

There's a field of engineering specific to power electronics. It can get super complicated. I don't understand a lot of it myself.

[–] Psaldorn@lemmy.world 19 points 11 months ago (1 children)

Check out bigclive on YouTube, he takes apart lots of electronics and breaks down the circuits. He investigated lots of cheaper, dodgier stuff too. Like lamps with usb ports that are mains voltage when the lamp is plugged in to recharge. Fun times.

Or electroboom if you want to see what happens when you lack care around those same electronics

[–] spicytuna62@lemmy.world 5 points 11 months ago

I remember his video about people burning wood with microwave transformers. 2-3kV is some lethal shit. Some lady, one of the lucky survivors of an accident, had her hand mutilated as a result of messing with that kind of voltage.

[–] onion@feddit.de 4 points 11 months ago* (last edited 11 months ago)

After looking at RAM, clock speed, program storage space, and a few other components, Heller concluded that today's USB-C chargers are more or less 563 times faster than the Apollo computer.

https://www.popularmechanics.com/technology/a30916315/usb-c-charger-apollo-11-computer/

[–] Aggravationstation@lemmy.world 19 points 11 months ago (1 children)

I record every time I unplug my phone charger for posterity too.

[–] idunnololz@lemmy.world 10 points 11 months ago

Prob fell off the first time so they put it back on and recorded it.

[–] Goo_bubbs@lemmings.world 7 points 11 months ago

This reminds me of my life.

[–] nakal@kbin.social 5 points 11 months ago

It was getting better after the circuit board came off. (also: gifs that end too soon)