Light timer/dimmer?
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Posted by Calab on July 4, 2008, 11:51 pm
Please log in for more thread options I have a need to control a light fixture in my home. At a certain time I need the light to come on and later on the light should go out. The problem is that I need it to change states slowly. Load could be anything between 100 and 600 watts. It would be nice to find something that fits in a 1 gang electrical box, but I haven't been able to find anything. I also have the need for something similar, controlling about a dozen LEDs, for the lighting in a fish tank. Does anyone have any idea how I can do these? | |||||||||||||||||||
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Posted by DaveM on July 5, 2008, 1:11 am
Please log in for more thread options The very last circuit (Varying brightness AC lamp) on the page at http://ourworld.compuserve.com/homepages/Bill_Bowden/page4.htm looks to be straightforward and easy to build. No expensive or exotic parts; give it a look. If you'd rather have a kit, look at the slow dimmer kit at http://youdoitelectronics.com/Kits/id1226.htm, kit #K8029 (SLOW ON-OFF DIMMER). Oopsss.. that one will only handle 200 watts. You could probably replace the triac in the kit with a higher current type... and you might have to put it on a heatsink for the higher power loads. You can probably find that kit at a number of other web vendors.. just Google for Velleman K8029. Looks like the PC board might fit inside a box... but you need to measure to be sure. The dimmers above are the slow dimmer portion only, they will not control the times your lights turn & off. For that, I recommend that you look at an appliance timer from your local home improvement or tool center. Something like the timer at http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=95205. That should get you going in short order. -- Dave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) Experience: What you get when you don't get what you want | |||||||||||||||||||
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Posted by Dave Platt on July 5, 2008, 2:08 am
Please log in for more thread options >I have a need to control a light fixture in my home. At a certain time I
>need the light to come on and later on the light should go out. The problem >is that I need it to change states slowly. Load could be anything between >100 and 600 watts. I believe that some of the professional-grade X10 light-dimmer control circuits have this basic capability, and there are probably some variations that can handle up to 600 watts. -- Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! | |||||||||||||||||||
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Posted by Rich Webb on July 5, 2008, 10:24 am
Please log in for more thread options On Fri, 4 Jul 2008 23:08:58 -0700, dplatt@radagast.org (Dave Platt)
wrote: >>I have a need to control a light fixture in my home. At a certain time I
>>need the light to come on and later on the light should go out. The problem >>is that I need it to change states slowly. Load could be anything between >>100 and 600 watts. >
>I believe that some of the professional-grade X10 light-dimmer control >circuits have this basic capability, and there are probably some >variations that can handle up to 600 watts. FWIW, the "regular" X10 controllers can dim from 100% to 0% but they don't want to go the other way; a lamp that's off can only be set to a dimmed brightness by first turning it on (=100%) and then dimming it. Once it's on, of course, the dimming setting can be adjusted up and down; just can't go directly from off to, say, 10%. Note that the controllers I'm running are pretty old and the newer ones (or other models) may not have this limitation. -- Rich Webb Norfolk, VA | |||||||||||||||||||
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Posted by BobW on July 5, 2008, 1:39 pm
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>
> I have a need to control a light fixture in my home. At a certain time I > need the light to come on and later on the light should go out. The > problem > is that I need it to change states slowly. Load could be anything between > 100 and 600 watts. > > It would be nice to find something that fits in a 1 gang electrical box, > but > I haven't been able to find anything. > > > I also have the need for something similar, controlling about a dozen > LEDs, > for the lighting in a fish tank. > > > Does anyone have any idea how I can do these? > I used to be an X10 fan, but now it's Zwave, for me. It's very cool technology. The Home Settings line from Intermatic stuff will do exactly what you want it to (timing, soft on, soft off). http://www.homesettings.com/ Bob -- == NOTE: I automatically delete all Google Group posts due to uncontrolled SPAM == | |||||||||||||||||||
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> I have a need to control a light fixture in my home. At a certain time I
> need the light to come on and later on the light should go out. The problem
> is that I need it to change states slowly. Load could be anything between
> 100 and 600 watts.
>
> It would be nice to find something that fits in a 1 gang electrical box, but
> I haven't been able to find anything.
>
>
> I also have the need for something similar, controlling about a dozen LEDs,
> for the lighting in a fish tank.
>
>
> Does anyone have any idea how I can do these?
>
>