Date: Tue, 28 Sep 2004 08:13:14 +0800 From: Raymond <[EMAIL PROTECTED]> Subject: Re: [LIB] External power for a USB 2 card necessary?
From what I gather, those cards will work without external power BUT will only work in low power mode (so they'll run cardreaders, flashdrives, webcams, digicams, mice/keyboards, etc.). However, they won't power an (unpowered) external hard drive, battery charger or the like, presumably because the PCMCIA port can't be relied on to supply the current (500mA x 2 plus whatever the card itself draws). This has certainly been the case with the 2 USB2.0 and 2 Firewire cards I've tried (that is, the firewire works in 'unpowered' mode as well but not high power when it needs an extra 12v supply).
Of course, you could always do the trick I did and tap 5v off the motherboard (remember, my L100 has an extra PS/2 port added to the side ;-P ) ... see www.raybot.net for instructions :-)
Cheers!
- Raymond
At 10:16 AM 27/09/2004 -0700, you wrote:
Date: Mon, 27 Sep 2004 01:46:04 -0700 (PDT) From: Matt Hanson <[EMAIL PROTECTED]> Subject: External power for a USB 2 card necessary?
Just picked up a USB 2 cardbus PC card for my L100, and opened the box to find it's got an adapter to feed power from a PS/2 socket.
I'm a bit tired, and not feeling up to a Google search. Anyone have a USB 2 card that gets power directly via the PCMCIA port? I'm really prefer not to have to depend on the EPR to power the darned thing. Are there USB 2 PC cards that get powered from the PCMCIA socket?
Matt
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