Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!utgpu!water!watmath!thfisher
From: thfisher@watmath.UUCP
Newsgroups: comp.sys.cbm
Subject: Re: Commodore 64: How do you control a simple AC relay?
Message-ID: <15408@watmath.waterloo.edu>
Date: Thu, 5-Nov-87 10:32:02 EST
Article-I.D.: watmath.15408
Posted: Thu Nov  5 10:32:02 1987
Date-Received: Sat, 7-Nov-87 15:51:32 EST
References: <2955@bnrmtv.UUCP>
Reply-To: thfisher@watmath.waterloo.edu (Terry Fisher)
Distribution: na
Organization: U. of Waterloo, Ontario
Lines: 29
Keywords: Commodore 64, Hardware, User Port, Relay

In article <2955@bnrmtv.UUCP> geller@bnrmtv.UUCP (Phil Geller) writes:
>I want to use a Commodore 64 to turn an AC device on and off.
>It seems like this is a simple task, that could be accomplished
>with off-the-shelf hardware.  My problem is that I know next to
>nothing about Commodores and the peripherals available for them.
>From reading the manual it seems like I could connect the user port
>to a CIA chip, which would then control a relay.  If at all possible,
>I would much rather go out and buy something that is already designed.
>Does anybody know where I can find this sort of hardware, and an
>approximate cost?

The circuit to turn one AC device on and off is trivial.  It requires a couple
of off-the-shelf chips and a few resistors (plus of course the connector to
fit the computer:-).  I don't remember the circuit off hand, but if you
are interested, I can post a schematic and a simple program to run it.
As for price, you should probably be able to pick up the parts for <$10.

>Phil Geller
>Voice:  (415) 940-2376 
>UUCP:   ...{hplabs | amdahl | ames}!bnrmtv!geller
>mail:   BNR, P.O. Box 7277, Mountain View, CA 94039-7277

Terry Fisher

-- 
watmath!thfisher                              //
                                           \\//-\miga user.
The meek shall inherit the earth because everyone else is leaving.
Disclaimer: Would you claim these ideas? Neither do I.