From: "Devon H. O'Dell" <devon.odell@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] serial reboot boxes
Date: Sun, 8 Jan 2006 21:16:34 -0800 [thread overview]
Message-ID: <9ab217670601082116kecc9b49r@mail.gmail.com> (raw)
In-Reply-To: <43C1EE47.6070402@lanl.gov>
2006/1/8, Ronald G Minnich <rminnich@lanl.gov>:
> But: you can get reed relays from radio shack. Wire the contacts of the
> reed relay across RST. Drive the relay coil from one of 8 parallel ports
> of a PC. Voila, 8 remote resets. I did use these relays once for a
> remote doorbell, and I can tell you that you could even use the remote
> doorbell + reed relay combo for reset ... that would be amusing. Ring
> the doorbell, reset the rack of machines. The doorbells have multiple
> selectable channels. Fun.
You could use a parallel port to control more than 1 device. With
output and ground, you could use a microcontroller (or probably some
gates, but my EE skills suck) to determine which pins are set and have
an 8 bit mask to control up to 255 devices, I think.
--Devon
> If you have more time than money, this will work. We have more money
> than time, so we use ICE and similar stuff.
>
> ron
Ha. I'd go for a balance between the two :S
--Devon
next prev parent reply other threads:[~2006-01-09 5:16 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-08 18:34 Russ Cox
2006-01-08 18:53 ` erik quanstrom
2006-01-08 22:37 ` Skip Tavakkolian
2006-01-08 21:48 ` erik quanstrom
2006-01-08 21:13 ` Ronald G Minnich
2006-01-08 22:12 ` Steve Simon
2006-01-08 22:23 ` William Josephson
2006-01-09 0:08 ` David Leimbach
2006-01-09 3:20 ` jmk
2006-01-09 5:01 ` Ronald G Minnich
2006-01-09 5:16 ` Devon H. O'Dell [this message]
2006-01-09 5:27 ` jmk
2006-01-09 5:51 ` Skip Tavakkolian
2006-01-09 6:08 ` Martin C. Atkins
2006-01-09 12:38 ` Derek Fawcus
2006-01-09 12:44 ` Derek Fawcus
2006-01-09 15:47 ` Martin Harriss
2006-01-09 8:26 Fco. J. Ballesteros
2006-01-09 8:46 ` Steve Simon
2006-01-09 11:09 ` Skip Tavakkolian
2006-01-09 10:12 ` Charles Forsyth
2006-01-09 15:27 ` Ronald G Minnich
2006-01-09 15:32 ` William Josephson
2006-01-09 15:36 ` Ronald G Minnich
2006-01-09 9:28 ` Skip Tavakkolian
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