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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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2Switches - one light - how?
We have two switches (on top of stairs, one bottom) for a light. (It was set up in 1965, so I don't think there's fancy chipwork.) How was this set up? I'm thinking of replacing one switch with an infrared motion detector switch, but I have had some problems with these IR detectors if the lightwork is too fancy (eg, one LED bulb would never switch off in IR mode, but would manually switch on/off). - = - Vasos-Peter John Panagiotopoulos II, Columbia'81+, Bio$trategist BachMozart ReaganQuayle EvrytanoKastorian http://ourworld.compuserve.com/homepages/vjp2/vasos.htm ---{Nothing herein constitutes advice. Everything fully disclaimed.}--- [Homeland Security means private firearms not lazy obstructive guards] [Fooey on GIU,{MS,X}Windows 4 Bimbos] [Cigar smoke belongs in veg food group] |
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wrote in message ... We have two switches (on top of stairs, one bottom) for a light. (It was set up in 1965, so I don't think there's fancy chipwork.) How was this set up? I'm thinking of replacing one switch with an infrared motion detector switch, but I have had some problems with these IR detectors if the lightwork is too fancy (eg, one LED bulb would never switch off in IR mode, but would manually switch on/off). It's simple, it's just a pair of SPDT switches wired together, been used in just about every multi-floor house since practically the dawn of household electricity. Most split level houses common in the 60's and 70's have a DPDT "4-way" switch on the landing so the entryway light can be controlled from 3 locations and you can chain together as many of those as you want. You can get dimmers, motion detectors and other stuff like that designed for 3 way use though some of it has limitations. |
#4
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In article ,
wrote: We have two switches (on top of stairs, one bottom) for a light. (It was set up in 1965, so I don't think there's fancy chipwork.) How was this set up? I'm thinking of replacing one switch with an infrared motion detector switch, but I have had some problems with these IR detectors if the lightwork is too fancy (eg, one LED bulb would never switch off in IR mode, but would manually switch on/off). L1 L1 0===========0 0===========0============= Line | \ / | C 0================================O C \ / \ / 0===========0 0===========0============= Switch return L2 Optional L2 Intermediate If you wanted to replace a two way switch with an IR operated one it would need to have a Single Pole Double Throw relay etc. Ie, three switch ^ ^ ^ ^ terminals. If you wanted to *add* it to an existing two way switched circuit it would need a Double PDT relay wired as per the intermediate above, or the wiring altered to take a discrete intermediate switch in one of the original positions and the IR one as a two-way at the end of the altered circuit. -- *Taxation WITH representation ain't much fun, either. Dave Plowman London SW To e-mail, change noise into sound. |
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