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From: dansimon@REMOVExmission.com (Daniel Simon)
Subject: Re: 365 Day Programmable Time Switch
Date: Thu, 12 Sep 2002 16:29:49 GMT
Organization: XMission http://www.xmission.com/
NNTP-Posting-Date: Thu, 12 Sep 2002 16:27:35 +0000 (UTC)
X-Newsreader: Forte Free Agent 1.1/32.230
On Wed, 11 Sep 2002 16:28:32 GMT,
dansimon@REMOVExmission.com (Daniel Simon) wrote:
>On Sun, 1 Sep 2002 09:48:43 +0100, "Mike Meakin"
>>I am looking for a low cost programmable time switch that allows up to four
>>on/off times per day to be set on a single relay output. The hardware should
>>be cheap (£25 ish). Programming should be via a PC (Windows) allowing a nice
>>user interface. I can find all-singing and dancing timers with LCD displays
>>and multiple outputs (Grasslin) or I can find timers with complicated self
>>contained programming methods. Found some 'irrigation controllers' but these
>>are dedicated for this task.
>>All I want to do is switch lights on and off at different times on different
>>days with exclusions for holidays etc. All it needs is a PIC + EEPROM plus
>>Real Time Clock and some fancy software for squirting data into the EEPROM.
>>Could do it myself I suppose but someone MUST have done this ! Failing that
>>does anyone fancy a nice VB programming job - I'll do the hardware ? I
>>won't be selling millions but this could be a useful bit of kit ?
>I have a box that does very much what you describe. It is an
>X10 CM11A pc interface for controlling devices attatched to
>houshold wiring. It can be set up by pc using a serial port
>and then disconnected. It plugs in to the wall and sends
>signals thru the houshold wiring to cheap little modules
>also plugged or wired to the household wiring.
>It has a real time battery protected clock and seems to have
>enough memory to handle quite a few events. IIRC it only
>has a 7 day cycle, not yearly. My box is for US wiring, you
>would have to find a UK equivalent.
>If you did a PIC +EEPROM it would be trivial to include the
>real time clock functionality in the PIC if you used a 32768
>hz watch crystal. If you used a 16F87x you might have enough
>runtime writable flash available to hold your schedule and
>dispense with the EEPROM.
It appears that the UK version of what I have is called a
CM12. Take a look at
Looks like the "Take Control" kit would give you the CM12 as
well as an appliance switch module and a dimmable lamp
module for a bit more than you wanted to spend. But it could
be the base of an elaborate expandable system if you wanted
to go that way.
I fired up the ActiveHome control software and discovered
that my module can indeed be set to control events on
particular calendar days.
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