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Multiple switches on the same light?

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AdventureD

Joined: 13 Jan 2021
Posts: 16

Posted: Wed Mar 03, 2021 10:14 am Post subject: Multiple switches on the same light?

Is there anything wrong with (i) wiring a Map Light to a switch with that name on the panel so that the light it can simply be turned on and off, AND (ii) wiring the same light to a dimmer circuit that controls some additional lights so that they can all be dimmed at once?  If only the Map Light switch were turned on, the Map Light would just come on.  If only the dimmer were turned on, the Map Light would get brighter and dimmer with adjustments to the pot.  If both were turned on, what happens?  I would assume the dimmer would just be ineffective.



I want to be able to turn the light on and off--full power, without dimming--and be able to separately dim it with others.  Can I do it the way I described?



Thanks!

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user9253

Joined: 28 Mar 2008
Posts: 1927
Location: Riley TWP Michigan

Posted: Wed Mar 03, 2021 4:29 pm Post subject: Re: Multiple switches on the same light?

I think that you could accomplish your goal by using a diode to prevent the 

full-bright circuit from interfering with the dimmer circuit.  I can not be more 

specific without knowing exactly how the circuits are wired.

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Joe Gores

AdventureD

Joined: 13 Jan 2021
Posts: 16

Posted: Thu Mar 04, 2021 6:36 am Post subject: Re: Multiple switches on the same light?

The attachment shows what I was thinking.



1. Both switches off -- no lights on.

2. Map Light switch on, POT off -- Map Light on full bright.

3. Map Light swtich off, POT on -- POT controls brightness of both lights

4. Both switches on -- POT gets no juice, Map Light on full bright.



Thoughts?

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Dimable light circuit.pdf

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user9253

Joined: 28 Mar 2008
Posts: 1927
Location: Riley TWP Michigan

Posted: Thu Mar 04, 2021 8:55 am Post subject: Re: Multiple switches on the same light?

Jeff had a good idea. Below is a schematic of his suggestion.

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MAP LIGHT.jpg

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Joe Gores

jluckey(at)pacbell.net
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Posted: Thu Mar 04, 2021 9:12 am Post subject: Multiple switches on the same light?

Joe, thanks for drawing that up!

Picture worth 1000 words 

-Jeff

                  

                                                                    On Thursday, March 4, 2021, 09:08:18 AM PST, user9253 <fransew(at)gmail.com> wrote:                 

                 



                 



                 --> AeroElectric-List message posted by: "user9253" <fransew(at)gmail.com (fransew(at)gmail.com)>



Jeff had a good idea.  Below is a schematic of his suggestion.



--------



Joe Gores



Read this topic online here:



http://forums.matronics.com/viewtopic.php?p=500859#500859



Attachments: 



http://forums.matronics.com//files/map_light_114.jpg



http://www.matron===================



http://wiki.matronics.co======================

ht========

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AdventureD

Joined: 13 Jan 2021
Posts: 16

Posted: Thu Mar 04, 2021 9:52 am Post subject: Re: Multiple switches on the same light?

The problem is my Map Light rocker (already in the panel) is a two position DPDT switch.  I should have mentioned that.  I think my diagram works given that fact.

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user9253

Joined: 28 Mar 2008
Posts: 1927
Location: Riley TWP Michigan

Posted: Thu Mar 04, 2021 3:27 pm Post subject: Re: Multiple switches on the same light?

If you use the 2 position switch, move the other light from switch terminal 5 to 

terminal 4.  The other light will always be controlled by the dimmer regardless 

of the switch position.  The map light will either be full bright or controlled by 

the dimmer but never off.

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Joe Gores

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