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iPod charge voltage?

I've got an iPod AC adapter with FireWire connector for charging the iPod. Since all interface with computers is now via USB, I'd like to adapt this charger by cobbling together a USB-to-FW cable that connects -- power conductors only -- from a male FW connector to a female USB connector.

My question is whether these two AC adapters (let's say Apple brand, both) output the same voltage. I presume so, but that's enough to get me into trouble.

Any help -- toward this end -- would be warmly received.

Happy Holidays, and Thanks,

--
John English
Reply to
John E.
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Hi!

You should be *extremely* careful if you do this. The voltage provided on the Firewire bus is 48 volts! USB only puts out 5 volts. The difference would likely cause immediate destruction of the USB circuitry or even the whole iPod.

I have an Apple-made Firewire-style charger for an iPod. I believe it puts out 48 volts as well, but I'll have to check.

William

Reply to
William R. Walsh

Why 48 volts? Seems strange to use a non native voltage.

--
*Sleep with a photographer and watch things develop

    Dave Plowman        dave@davenoise.co.uk           London SW
                  To e-mail, change noise into sound.
Reply to
Dave Plowman (News)

On Thu, 21 Dec 2006 10:06:40 +0000, Dave Plowman (News) Has Frothed:

Full spec firewire can deliver 40 volts at 1500mh. Never heard of it being higher than 40.

--
Pierre Salinger Memorial Hook, Line & Sinker, June 2004

COOSN-266-06-25794
Reply to
Meat Plow

Huh?

formatting link

30 volts.
Reply to
JW

I thought the spec is something like 9v-40v.. I'm pretty sure the 1394 ports on my computer are 12v. I made a car charger for my old firewire ipod with a firewire cable and a cigaret lighter plug. I havn't had any problems.

- Mike

Reply to
Michael Kennedy

Well that's three 'specs' so far. ;-)

But why the non native voltage? Only reason I can think of is long cable runs - but then why power such a device off the cable?

Incidentally I've got a FireWire PCI card on my PC and there's no sign of a voltage convertor on it. It does have a 5/12volt input as well as the edge connector, though.

--
*Whatever kind of look you were going for, you missed.

    Dave Plowman        dave@davenoise.co.uk           London SW
                  To e-mail, change noise into sound.
Reply to
Dave Plowman (News)

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