7 Nov
2006
7 Nov
'06
2:25 p.m.
On Tuesday 07 November 2006 14:52, der Mouse wrote:
Yes. You need two SPDTs (which you already have) plus as many DPDTs
as necessary to fill out the desired quota of switches (which means
just one of them, in your case). I've seen it done (at least for
three switches).
You need to cross-wire the DPDT, but that's no biggie (drop me a line
if you don't know the wiring and I'll outline it for you); I think
there even exist DPDTs pre-cross-wired to be total no-brainers for
this application.
Yes, in fact they're called a "4-way" switch at your local hardware or
electrical supply store (because they have 4 terminals).
There's some explanation complete with ASCII art diagrams here:
http://www.homeautomationindex.com/4waywire.html
Pat
--
Purdue University Research Computing --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
7) Three way switch at the other enough of the hall.
It's already on a three-way switch with the bottom of the stairs...
do they make 4-way switches?