Linux-Hams archive - May 1998: Re: Watchdog
Re: Watchdog
Duvall, Michael J. (wtqgol@relay.tunkki.fi)
Tue, 5 May 1998 12:56:11 -0400
Bdale Garbee replied:
>: You are right.. almost nothing.. Just the hard disk and CDROM drives.
>
>Nope. They use the +12V supply, almost nothing uses the -12V supply.
Yes.. you are right. I did not read the message that close. I think a lot
of the RS-232 interface chips can actually generate the negative voltage
from the +5.
Mike Duvall
ac4zq