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Rockbox mail archive

Subject: Re: Charge from the USB or not
From: Andrew Jamieson (ajamiesn_at_optusnet.com.au)
Date: 2003-01-24


wow. That didnt work. But you get the idea.

A
----- Original Message -----
From: "Andrew Jamieson" <ajamiesn_at_optusnet.com.au>
To: <rockbox_at_cool.haxx.se>
Sent: Saturday, January 25, 2003 8:42 AM
Subject: Re: Charge from the USB or not

> I will do the schematics for my USB charger this weekend .... I've been a
> bit slack. You don't have to worry about the USB connection: you can
either
> not connect the USB plug, or (as I did) provide a switch on the 5V line
> (Vbus) into the Archos. Without Vbus, the USB section of the Archos will
> not be 'switched on', so you can leave the USB plug connected at all
times.
> Illustratively (if you'll forgive my ASCII circuit);
>
>
> ___________________
> | Archos Power Port
> |
> |
> |
Vbus ----------------------|Charger|-------|Switch|-----------
> |
> PC |
    ------------------------------------------------------------
> | Archos USB Port
> USB |
    ------------------------------------------------------------
> |
> |
> GND ------------------------------------------------------------ |
>
> I'm quite happy with my charger, I never use my plug pack anymore - my
> Archos just stays connected to my PC at home or work.
>
> A
>
> ----- Original Message -----
> From: "Joaquim Carvalho" <jdc_at_x64.com>
> To: <rockbox_at_cool.haxx.se>
> Sent: Saturday, January 25, 2003 2:26 AM
> Subject: Charge from the USB or not
>
>
> > I no longer think it's a good idea to mod the archos for
> > usb charging since it is locked in USB mode when the plug
> > is connected, but a simple Schotky diode to power the
> > device from USB might a good idea.
> >
> > USB voltage is 5V, less the diode dropout at 300mA we have
> > around 4.8V which is around the nominal voltage for 4 NI-MH
> > batteries - not all current would come from USB but some
> > some battery power would be saved...
> >
> > It might enable us to go to a friend's house for a few hours
> > MP3 up/download without running out of batteries.
> >
>



Page was last modified "Jan 10 2012" The Rockbox Crew
aaa