July 26th, 2005, 08:47 AM
2 way electrical circuit
I want to fix another switch to the light in the bedroom for my mom so that she can switch off the light from her bed. I need a circuit which will work as follows:
switch on the wall => switch next to her => light
ON => ON => OFF
ON => OFF => ON
OFF => ON => ON
OFF => OFF => OFF
In other words, the light should switch on only if one of them is switched on and not both.
July 26th, 2005, 08:53 AM
Greetings: I would either suggest this.......
Clap On.............Clap off.......................!!!!!
Just kidding man.
I would think a remote control lighting system, there are many of them. You could more than likely figure out a less expensive way to install one.
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July 26th, 2005, 09:14 AM
I don't know the english word.. it's called a 'hotel schakelaar' in dutch and a 'interrupteur va-et-vient' in french..
here's how it works..
http://www.zowerkt.nl/inenomhuis/ele...schakelaar.htm (DUTCH !!)
I think the image speaks for itself..
ASCII stupid question, get a stupid ANSI.
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July 26th, 2005, 09:19 AM
Originally posted here
I don't know the english word.. it's called a 'hotel schakelaar'
Jinx as long as you accept that my 'hotel schakelaar' is bigger than yours I am ok with myself.
Get some good religion from Bad Religion.
July 26th, 2005, 11:23 AM
<sigh>... i wish i could .
heh, but not in this lifetime.
Thanks. Just what I was looking for. Looks like a little more work than I thought, but I think I can do it.
July 26th, 2005, 02:32 PM
why not the normal 2-way switch?
basicly a pair of single pole double throw switches
scroll down to "Two Way Lighting".. there is the basic system..
Now you could make a control circuit from the basic building blocks.. the pattern here looks XOR
0 + 0 = 0
1 + 0 = 1
0 + 1 = 1
1 + 1 = 0
a single exclusive or-gate .. you can use a simple logic pack IC or build it out of transistors.. not that complex..
but the 2 spdt switches looks more reliable..
[Edit] JinXey has the original circuit.. I just didnt read the contents of his links untill now....
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July 27th, 2005, 02:23 AM
In the US, we use three-way switches to do what you are asking.
July 27th, 2005, 03:40 AM
Okay, here's our points:
A-, B-, A+, B+, Lightbulb.
I think this should work... I have this light switch system all over my house.
Go from A-, to lightbulb, to B+, and run the other wire from B+ to Lightbulb, then B-.
Blah, that could be wrong, it's getting late, I'm sleepy... your local home depot fokes would without a doubt be able to tell you for sure.
July 27th, 2005, 12:53 PM
what you need is two single-pole-double-throw switched, and then connect them agains each other...let me try to make an ascii diagram. or PM for further details :P
/ ---------------------------- \
\ ---------------------------- /
basicaly, switches A and B are identical, they have one leg where the power comes in, and two states, either 1 or 2, so, it will either send power down path 1 or 2 depending of how the switch is set, this means that both switches A and B can control the light because they simply need to have the same setting (1->1 or 2->2), to turn the ligh of, simply flip a switch, and it will become 1->2 or 2->1 which will break the circuit.
This is atleast how we normaly did it.
EDIT: ASCII art sucked something cronic!! used \x0160 rather than \x0032 to fix it (I hope)
EDIT2: **** it, pm me if you want circuit diagrams...
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July 27th, 2005, 01:19 PM
Undies has it right. It's the classic 'staircase' scenario - one switch at the top of the stairs, one at the bottom. Both on == on, both off == on, one off one on == off.
If I had my old BEE notes I'd post the diagram - it's not too difficult to wire.
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