From: "Michael A. Terrell"
Subject: Re: 2 Switch, light bulb either/or thing.
Date: Wed, 09 Oct 2002 10:22:48 -0400
Organization: Do I have to? Well, Ok. If you insist!
X-Mailer: Mozilla 4.61 [en]C-CCK-MCD (Win95; U)
References: <email@example.com> <3DA377A2.637ED171@mfi.net>
Loan Nguyen wrote:
> "Michael A. Terrell" wrote in message news:<3DA377A2.637ED171@mfi.net>...
> > Loan Nguyen wrote:
> > >
> > > firstname.lastname@example.org (ThatsWatt) wrote in message news:<email@example.com>...
> > > > Sorry but I canīt think of a better name for this circuit! But anyway,
> > > > for all of you that want to know how the get two independent light
> > > > switches to either turn on or turn off the same light bulb see the
> > > > link below. It is very handy for wiring the light in a stairwell, with
> > > > one switch at the bottom of the stairs and one at the top. Hope you
> > > > like it?!
> > > >
> > > > http://www.thatswatt.com/electron/lightthing.html
> > >
> > > How about 3 switches controll 1 bulb,... or N switches do the same thing ?
> > You mean the infamous "N-Way Switch?"
> Sorry, Nope. I meant N number of switches.
The concept is counting the switches from one end of the circuit, and
back to the first switch to show that all modes work at all locations.
I have seen the old ceramic push button light switches that were three
way, and they haven't been made in decades. Probably prior to WWI or
WWII. Like all trades, ideas get names which may not make a lot of
sense outside that industry, or even the region.
The "three way" definition is from electrical usage meaning using
two switches. With the light off and starting from either switch, then
the other you have an "ON", "OFF", "ON" function. which is their
definition of "Three way"
The "four way" definition is from electrical usage meaning using
three switches. With the light off and starting from any switch, then
any other you have an "ON", "OFF", "ON", "OFF" function.
You can't expect a simple wire jockey to understand the concept of
"N+1" function, without naming each function. Some insist that you
can't have more than a "Four way switch", even with a dozen or more
switches, because that is how the parts are marketed.
Michael A. Terrell