Newsgroups: sci.electronics
Path: utzoo!utgpu!watserv1!watdragon!daisy.waterloo.edu!hziemann
From: hziemann@daisy.waterloo.edu (Hans Ziemann)
Subject: light switches in germany
Message-ID: <1991Feb13.035525.3515@watdragon.waterloo.edu>
Keywords: switch germany lighting control query
Sender: daemon@watdragon.waterloo.edu (Owner of Many System Processes)
Organization: University of Waterloo
Date: Wed, 13 Feb 1991 03:55:25 GMT
Lines: 43

I am new to this newsgroup, and have not had time to do any 
reading.  I have a simple question that a few people may be 
able to help me with, if you are in the right geography.

I am taking a power control course right now, and we got to
discussing light switches.  A few years ago, when I was in 
Germany, studying at the Technische Universitaet Braunschweig, 
I noticed that they have light switches that turn 
them selves off after a short time.  

These were used in hallways, garages, and the like.  We have 
tried our darndest to try and propose a simple way of making
this work, but have failed miserably.  I would like to make 
one of these as a course project.

Could someone in Germany or otherwise, who knows how these
switches work, send me a description or even a schematic
(I understand both the north american convention and the 
european convention -- just tell me which one it is).  

Or, if you know of someone who knows how this works, could you
pass allong this request?  

Please send it to me directly, as I have trouble keeping up with
newsgroups.  If you too are interested in this, send me mail, 
and I will let you know once I find out.

Please send it to me at 

	hziemann@daisy.waterloo.edu
	hziemann@daisy.uwaterloo.ca
	or equivalent...

I have canabalized dimmer switches already and think the 
process is somewhat similar.  But, then again...

Any and all help will be greatly appreciated.   Thanks a bunch.

Hans Ziemann
University of Waterloo
Electrical Engineering