Wall warts seem to be taking over the world...

[Mike Tomlinson]

En el artículo , Dave Liquorice escribió:

The wheels grind exceedingly slow, but there does seem to be progress being made.

argers/

[harryagain]

Tch. Have you no idea at all? Over five amps of fault current can flow and start a fire before it blows. A fuse can't discriminate betwen what is a fault and what is not. There is no 100% protection of any sort against faults and even 10w can start a fire.

[The Natural Philosopher]

oin what way is that a conradiction to what he said?

Wow. Your penetrating intellect continues to astound. WD40 has nothing on you, does it?

No! Really! even a match can start a fire harry!

I have come to the broad conclusion you are so thick that you cannot conceive of what intelligence is really like.

[Tim Watts]

On Saturday 05 October 2013 02:06 Mike Tomlinson wrote in uk.d-i-y:

It does seem to be converging micro-usb as mentioned in that link. The new Samsung phones seem to be sporting micro-usb-3 which is a weird socket:

But that contains a full micro-usb-regular socket and will charge from a regular lead.

I don't like the micro-usb socket though - in practice is is weak for something that gets knocked and picked up by the cable. I have lost one Samsung charger due to plug disintegration. It's also fiddly to insert as there's not much lead-in.

It is unnecessarily small - it could be a little thicker and a lot wider and still suit any modern slim phone.

The Apple connector (the old one anyone) was better, mechanically.

[Huge]

Yes, but that's c*ck posted by a loon.

[Nightjar]

In the real world we deal with what is probable. A 1.5mm three core PVC flex is rated at 15 amps and will sustain a 50% overload for an hour. A

5 amp cartridge fuse will disconnect the circuit in 5 seconds at the flex continuous current rating and in 0.4 seconds at its one hour overload current. As I said, the flex is not going to overheat.

Colin Bignell

[Apellation Controlee]

My iPhone is fussy about what the USB cable is plugged into. Not every USB socket will charge it.

[Tim Watts]

On Wednesday 09 October 2013 07:15 Apellation Controlee wrote in uk.d-i-y:

As is any device needing lots of amps.

The USB spec says that beyond a nominal current, the device must actively negotiate with the host for more current.

This is of course impractical for a dumb charger, so Apple and others came up with a more passive signalling system taht involves putting a 3 resistor divider between the +ve and -ve supply and connecting DATA+ and DATA- to the intermediate points as a form of simple signalling that the supply could provide 1A.

I have no idea if this evolved into a standard across manufacturers (Samsung certainly do something similar) and how they differentiate a 1A from a 1.5A from a 2A charger (the 2A is starting to show up the choice of 5V as not a particularly great idea).

[Apellation Controlee]

Interesting - thanks.