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USB power supply puts 220 Mains power out on USB jack

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Re: USB power supply puts 220 Mains power out on USB jack

#101

Post by yitchelle »

jklp wrote: post #66

Not sure if HN knows about Mehdi Sadaghdar's (aka ElectroBOOM's) YouTube channel, which is somewhat similar - but takes a more lighthearted view on electronics. E.g. Compare Big Clive's mention of a full bridge rectifier in the video vs Mehdi's YouTube video of the same thing :) https://youtu.be/sI5Ftm1-jik

I love this guy. His skids are like slap stick for the makers.

However, on the serious side, I wish that he would publish a complementary video showing the real story of what he is doing.

My kids would watch his videos, and then run off the find the bits to do exactly what he did. Hmm..Luckily I was there to let them know of the real consequences.

Re: USB power supply puts 220 Mains power out on USB jack

#102

Post by Symbiote »

marshray wrote: post #96
13of40 wrote: post #93

Earlier quoted context omitted.

I don't get it. They made transformers like that for about 80 years in America, but if a Chinese person does it, it's crazy and dangerous? It looked like she was doing a pretty good job.

Nobody said anything about America or China. The listed uploader on the video even suggests it's from India. So quit yer trolling. The transformers made 80 years ago were indeed dangerous. Generally they used paper insulation soaked in fire retardant chemicals. There are a couple of observations I make about this video: 1. She's working amazingly fast and clearly with great skill. However, there's very very little ti…

(She speaks Mandarin, briefly, so this is very likely China.)

It's amazing though! Working that fast.

It's also just what the client ordered, if they wanted better quality they'd have to pay for it.

Re: USB power supply puts 220 Mains power out on USB jack

#104

Post by djsumdog »

voltagex_ wrote: post #85
femto wrote: post #77

Earlier quoted context omitted.

I can answer from an Australian perspective. Here's how it's supposed to work: Suppliers register and prove that their products comply with Australian standards, and are awarded a compliance number. That number is the consumer's indicator that a product is safe. Any interested party can check that the certification is genuine by looking up the compliance number in an online database. Here's how it works in practise:…

I wonder what the hell's gone wrong in that department to not have a replacement after all that time.

You should read up on Myki

Re: USB power supply puts 220 Mains power out on USB jack

#105

Post by InclinedPlane »

dom96 wrote: post #57

Aren't there legal tests that any appliance which plugs into the mains must pass? I'm surprised this kind of thing is possible, but I guess not performing such tests cuts costs.

There's so much forgery of UL and other certification marks and so little enforcement or punishment for doing so that you can't rely on them.

Re: USB power supply puts 220 Mains power out on USB jack

#106

Post by ktRolster »

marshray wrote: post #51

If you are wondering "How could an isolation transformer ever get past QC with abraded or nicked insulation?", you might find this video interesting: https://www.youtube.com/watch?v=HEJn74Z3wHk

I think that video has been sped up somewhat....

Re: USB power supply puts 220 Mains power out on USB jack

#107

Post by voltagex_ »

djsumdog wrote: post #104
voltagex_ wrote: post #85

Earlier quoted context omitted.

I wonder what the hell's gone wrong in that department to not have a replacement after all that time.

You should read up on Myki

Public transport payment system != product safety system.

Re: USB power supply puts 220 Mains power out on USB jack

#110

Post by voltagex_ »

stordoff wrote: post #80
yoodenvranx wrote: post #10

Earlier quoted context omitted.

I play Ingress a lot (a GPS based mobile game where you run around a lot in the real world so most players use external batteries) and at least 60-70% of the whole community uses Anker products. I personally know at a dozen people who use Anker wall plugs and all of them (including me, 1 wallplug and 2 battery packs) are very happy.

Does anyone know if the RAVPower products are any good? I have a few (4-port USB charger, 6-port USB charger, and a battery pack) and have been impressed with their performance (they are the only chargers I have found that my Vita will recognise, for example), but can't find any teardowns etc. discussing build quality.

I have this funny feeling that Tronsmart, RAVPower, Aukey and Anker are using the same factory for these - very similar specs and features for all of these chargers. If I had the cash to get 5x ~$50 devices tested by someone like Clive, I'd definitely do it. I do worry about the internals of the device being swapped out silently by the manufacturers, though.
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