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From: rpw3@redwood.UUCP (Rob Warnock)
Newsgroups: net.wanted.sources
Subject: Re: Non-standard device driver needed
Message-ID: <139@redwood.UUCP>
Date: Thu, 24-Jan-85 21:18:38 EST
Article-I.D.: redwood.139
Posted: Thu Jan 24 21:18:38 1985
Date-Received: Mon, 28-Jan-85 07:40:15 EST
References: <572@oddjob.UChicago.UUCP>
Organization: [Consultant], Foster City, CA
Lines: 39

[I couldn't resist...]

+---------------
| 	Does anyone out there have a device driver for a Mr. Coffee to
| 	run on a VAX 11/780 running 4.2BSD?
| 		Paul Schinder | 	Astronomy and Astrophysics Center
| 		University of Chicago |	uucp: ..!ihnp4!oddjob!paul
+---------------

YES! ;-}   I assume it's to get the coffee started before you come
in at 2 or 3 in the morning to make those late night "observations"?
Well, the following may help... ;-}

Buy a Radio Shack #63-888 Micronta Electronic Programmable Timer.
It has a digital clock with on/off presets, and uses a hefty relay
(you know, MECHANICAL contacts?) to switch the load (up to 1875 watts).
Besides the automatic on/off, there is a manual on/off pushbutton.
It comes with a schematic, and you can easily (:-) wire the manual
pushbutton (with appropriate resistor and diode protection) to the
data terminal ready (DTR) output of one of your TTY ports. Use the
TIOCSDTR/TIOCCDTR ioctls to toggle DTR. (Some kernels have been
locally extended to let you read Carrier Detect (CD), which if wired
to the relay coil would confirm whether you had just turned the Mr.
Coffee on, or maybe off). If desired, you can cut the timer out
entirely, and connect DTR to the relay drive transistor Q4 for
positive control. Make sure the polarity is such that if the VAX
crash/reboots when you are not around, the Mr. Coffee ends up OFF,
rather than ON. ;-}

Combined with a music-playing program (see previous article on the
uses of DTR wired to a speaker), you can really "wake up and smell
the coffee". ;-}


Rob ("Is it April 1st yet?") Warnock

UUCP:	{ihnp4,ucbvax!dual}!fortune!redwood!rpw3
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