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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

#131
post #127

Earlier quoted context omitted.

Unfortunately there doesn't seem to be an authorised reseller in Australia

Yes there is. macfixit.com.au and mushtato.com.au both stock anker. Unfortunately, because of this Amazon has stopped shipping the brand to AU and the prices here are twice or more that overseas.

Bugger. Off to priceusa.com.au

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

#132

A true isolation transformer has an earthed copper shield wound in between and physically separating the primary from secondary windings, anything less is unsafe. One of the many reasons I detest "double insulated" equipment, as it is impossible to determine if it has been designed for safety or not without ripping it apart and destroying it. This is a real issue in Australia as our regulators do no regulating and mo…

What about ordering things that are also UL/CSA-approved? Lots of electronics sold in the EU have their CE mark, but also list their UL/cUL/CSA approval.

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

#133
post #43

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.

I pretty much only get Anker products now and recommend them to anyone, super high quality and very affordable. Pretty good customer service as well.

Beware: Anker became so successful that now Anker knock-offs are a thing.

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

#134
post #130

A true isolation transformer has an earthed copper shield wound in between and physically separating the primary from secondary windings, anything less is unsafe. One of the many reasons I detest "double insulated" equipment, as it is impossible to determine if it has been designed for safety or not without ripping it apart and destroying it. This is a real issue in Australia as our regulators do no regulating and mo…

If you're worried you can order 2 at the same time and then rip one of them apart. It's an expensive solution but it should give peace of mind.

But would it give peace of mind really? Right in the linked video. It would seem the widget is properly designed, it has a thick separation gap between the two sides on the pcb. It would seem, that you could test 10 of these and they are all fine, and the 11th kills you. Or is that transformer design obviously unsafe?

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

#135

Earlier quoted context omitted.

I bought five anker USB cables after reading about them on HN, and a wall charger, and I was actually really disappointed. All the cables stopped working within three weeks. Monoprice USB cables didn't fare well either, but the OEM cables that came with my Icons, kindle, and S3 have lasted years. Wall charger still works great, but the cables are what I was really interested in because people are always running off w…

What did Anker say when you contacted them? Anker has a warranty.

I'm very lazy and didn't bother. :) Given Anker's reputation, I would be surprised if they wouldn't have replaced them. (In fact I haven't bought new cables either - just been making do with the few cables I have which has been a bit of a pain.)

I just want cables without the hassle of going through warranty and RMA processes. It's possible I just got a bad batch - I can't believe people would be as positive about Anker if my experience was that common - but it did sour me on them. I just want to find a manufacturer where in my experience, the cables I buy are good 100% of the time and last for at least a year so I can buy them in bulk and recommend them to others with confidence. And I haven't found that.

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

#136
Finally a possible explanation [1] as to why Apple chargers (USB and laptop) give you tingles when touching the metal casing of the device they're plugged into.

Would love to know if the mentioned capacitor is indeed the reason and whether it leads to enough efficiency to justify the scare it causes with first time customers.

[1]: https://youtu.be/3Hdn0MuCK_0?t=2m14s

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

#137

Here, Clive looks at an Ikea USB power supply: https://www.youtube.com/watch?v=uRe9w5PKmsE&nohtml5=False Much better made.

The basic issue is that if that thing hurts or kills someone, Ikea's rep is on the line for selling crap products. Over on Amazon, anyone can offer something for sale. And the only real indication you have is the "sold by XYZ, fulfilled by Amazon" line somewhere near the top. The site is amazon.com, the logo and design is all Amazon, but Amazon never had to place an order for the item, nor is on the hook if something…

> Over on Amazon, anyone can offer something for sale.

The practice is called white labeling: http://www.investopedia.com/terms/w/white-label-product.asp

Basically an Amazon seller sources product from China and gets the manufacturer to label the product with their brand name. Quality can be either really good or dodgy.

However, I have seen a lot of this stuff with the CE mark but not the UL mark.

Do the CE underwriters just let anyone stamp their mark on any product with minimal oversight?

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

#138

How do I know what I'm buying is safe? I've sworn by the Nexus chargers in their various incarnations and http://www.amazon.com/Charge-Charging-Station-Micro-USB-Sams... (I have a Tronsmart and an Aukey vertsion)

Nothing is 100%, but the chance should be sharply reduced via certain tests. Supposedly the CE marking in Europe should be a good indicator, but sadly there are various ways that a company can self-certify products. I think the biggest problem is that Amazon allows anyone and anything to use them as an outlet by default. Thus many fly by night resellers can used Amazon's brand as a cover.

All CE certification is self-certification.

The manufacturer/importer is supposed to keep and present on demand a "technical file" detailing compliance to various standards, which is supposed to include particular tests, but there's no real guarantee that they've been done.

On the other hand, this is a major barrier to entry to small-run products, as is WEEE.

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

#139

Earlier quoted context omitted.

If you like AvE, check out This Old Tony. He is more machining focused, but he did do a clever multimeter 4/1 video.

If you are into machining then check out Clickspring, oxtoolco, Abom79, Keith Rucker, Keith Fenner, Shadow HKW, ... If this is not enough then go and visit this list: https://www.reddit.com/r/ArtisanVideos/comments/3v264a/meta_... (But be careful, this is the ultimate rabbit hole)

It's sad in a way that I only find out about these other channels on a HN thread. Youtube really should work on making channel discovery much more effective.

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

#140

Earlier quoted context omitted.

The basic issue is that if that thing hurts or kills someone, Ikea's rep is on the line for selling crap products. Over on Amazon, anyone can offer something for sale. And the only real indication you have is the "sold by XYZ, fulfilled by Amazon" line somewhere near the top. The site is amazon.com, the logo and design is all Amazon, but Amazon never had to place an order for the item, nor is on the hook if something…

> Over on Amazon, anyone can offer something for sale. The practice is called white labeling: http://www.investopedia.com/terms/w/white-label-product.asp Basically an Amazon seller sources product from China and gets the manufacturer to label the product with their brand name. Quality can be either really good or dodgy. However, I have seen a lot of this stuff with the CE mark but not the UL mark. Do the CE underwrit…

There are no CE underwriters and you put the mark on your own products. It's self-certification.

The manufacturer/importer is supposed to be able to produce evidence of compliance on demand, but if it's posted from China, good luck with that. This is why the products are so cheap.

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