Iphone charging...

Hello, my name is Martin
I have a very big problem with a 5v usb boost circuit. When i connect the circuit to the power, the led lights up, but no power... to iphones... everything else works, just not iphones. i already tried shorting the data ports with the 5v pin, AND THAT USED TO WORK, but not now!!!??

PLEASE HELP

I have now tried with adding some resistors to data+ and minus, still nothing

HELP!!!

0 mcb1 over 10 years ago in reply to Robert Peter Oakes

it is tough to think how the circuit could have ben made

I have a photo of the internals of a cheap charger.
They rely on a small piece of foam to stop the phase pin from making contact with the internal circuitry.

I'll dig out the direct link from the investigation ...rather than relay on some reporter.

Mark
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0 Robert Peter Oakes over 10 years ago

apparantly the headphones where plugged into the LAPTOP, not the phone, the phone was plugged into a cheap charger and the laptop was pluged into a wall brick also for charging

it is tough to think how the circuit could have ben made unles she was pligging into the laptop and touching metal on it or the headphones had exposed wiring. and she then also picked up the phone will connected to its charger

none of this would explain the burns on her chest of course

see here for more destails http://www.telegraph.co.uk/news/worldnews/australiaandthepacific/australia/10929662/Woman-in-Australia-killed-by-cheap-phone-charger.html
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0 Problemchild over 10 years ago in reply to mcb1

Hi Mark, if you touch some of the metal work near some of these cheap ar$e chargers you'll feel some AC on there and also most rely on the chip to give what little isolation there is so yeah a nice failure mode must exist even if it's unlikely.
I have even noticed that on some it even prevents the touch screen from working.
That said I'm not sure how the volts got to this Australian woman since the earphones are all plastic ... unless it was the phone Chassis she touched?
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0 Problemchild over 10 years ago in reply to gadget.iom

That sounds so Freudian!!!
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0 Problemchild over 10 years ago in reply to e14 Contributor

Yes it only requires a sniff of power it's only setting a data line after all not shunting any power through it
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0 mcb1 over 10 years ago in reply to gadget.iom

I seem to recall us discussing the woman in Australia who was killed with her 'cheap' charger.
She was charging it and listening to music using her ear buds.

Having seen the inside on some of these, and having had discussions with some people over the lack of understanding about electricity and how to design safe circuits the best advice I can give is

DON'T.

Mark
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0 gadget.iom over 10 years ago in reply to shabaz

"No. No, no, no, no, Jen. No, this needs to go straight back to Big Ben."
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0 shabaz over 10 years ago in reply to gadget.iom

How he said that without bursting into laughter is beyond me : )
He has a suppressed smile at that moment though!
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0 gadget.iom over 10 years ago in reply to shabaz

https://www.youtube.com/watch?v=iDbyYGrswtg
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0 shabaz over 10 years ago in reply to gadget.iom

LOL. Yes, and such a compact product too for the entire state to design.
Can't help another IT crowd recollection!:
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