Rockbox mail archive
Subject: Re: V1R running on USB power possible.
From: Ronald Teune (rtwolf_at_gmx.net)
Can't remember when, why or were, but I read part of the USB spec, 1 or 2
days ago, and it said that the voltage from usb has to be 4.5 V or higher,
and the max current is 500mA. Also, for self-powered hubs it must be at
least 100mA. Well, that's what I remember. So if you have bad luck, it
isnt gonna work at all...
And, if your batteries die in one hour even with charger connected, I
think you should consider buying new batteries (or is this normal? My v1
rec stayed on for about one hour too, without charger)
Anyway, good luck :)
On Thu, 2 Sep 2004 11:49:40 +0100, Stuart Tedford
> I'm getting annoyed with only being able to connect my V1Recorder to my
> via USB for an hour or so before the batteries go flat. It just doesn't
> give me enough time to do the things I want to, even on USB2. (eg,
> defragment, copy loads of files, etc). I have an 80G disk in it.
> So I'm thinking, why can't I connect the USB 5v to the disk via a diode
> something. If I use a shotky diode I could deliver about 4.7 volts to
> disk. I guess the main problem is the batteries which are also connected
> directly to the disk. So maybe 4.7 volts via a diode and totally dead
> batteries would be a problem, but one I could try to avoid by being
> aware of
> Has anyone else tried doing this, or thought about it?
Page was last modified "Jan 10 2012" The Rockbox Crew