|
Rockbox mail archiveSubject: Re: Charge from the USB or notRe: Charge from the USB or not
From: Andrew Jamieson <ajamiesn_at_optusnet.com.au>
Date: Sat, 25 Jan 2003 08:48:48 +1100 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. > > > Received on 2003-01-24 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |