Subject: Re: 2 Switch, light bulb either/or thing.
References: <firstname.lastname@example.org> <3DA377A2.637ED171@mfi.net> <3DA43BB8.A628E12C@mfi.net>
Organization: The Armory
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From: email@example.com (Richard Steven Walz)
Date: 09 Oct 2002 21:47:15 GMT
In article <3DA43BB8.A628E12C@mfi.net>,
Michael A. Terrell wrote:
>Loan Nguyen wrote:
>> "Michael A. Terrell" wrote in message
>> > Loan Nguyen wrote:
>> > >
>> > > firstname.lastname@example.org (ThatsWatt) wrote in message
>> > > > 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
No, but you only NEED SPDT and DPDT switches to make ANY-way switches!!
-Steve Walz email@example.com ftp://ftp.armory.com/pub/user/rstevew
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