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From: ted@blia.UUCP
Newsgroups: sci.electronics
Subject: Re: Question about multi-switched lights
Message-ID: <1899@blia.BLI.COM>
Date: Thu, 26-Mar-87 12:05:13 EST
Article-I.D.: blia.1899
Posted: Thu Mar 26 12:05:13 1987
Date-Received: Sat, 28-Mar-87 04:45:18 EST
References: <1922@ihlpl.ATT.COM> <562@puff.WISC.EDU> <3972@fritz.UUCP> <18008@ucbvax.BERKELEY.EDU>
Organization: Britton Lee, Los Gatos, CA
Lines: 32



You can get n switches in the circuit without using bigger than double pole
switches. The end two switches are SPDT wired just as you figured out.
The rest of the switches are DPDT wired into the two wires running between
the end switches so that operating the middle switch cross connects the wires.

             o------+
 ----------o        +---------------
	    \       |
	     o--+   |
                |   |
	     o--+   |
                |   |
 ----------o    +-------------------
	    \       |
	     o------+

This gives the desired result of any switch switching the circuit.

-- 
===============================================================================
            Ted Marshall
            Britton Lee, Inc.
p-mail:     14600 Winchester Blvd, Los Gatos, Ca 95030
voice:      (408)378-7000
uucp:       ...!ucbvax!mtxinu!blia!ted
ARPA:       mtxinu!blia!ted@Berkeley.EDU
disclaimer: These opinions are my own and may not reflect those of my employer;
            I leave them alone and they leave me alone.
fortune for today:
Things are more like they used to be than they are now.