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Author Topic: Light Senor with Timer Possible for Controlling Landscape Lights?  (Read 11143 times)

systemdm

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Re: Light Senor with Timer Possible for Controlling Landscape Lights?
« Reply #30 on: November 14, 2011, 11:01:57 AM »

I would be interested in seeing this layout......... #:)
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shorty73

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Re: Light Senor with Timer Possible for Controlling Landscape Lights?
« Reply #31 on: November 15, 2011, 01:04:33 AM »

Just wanted to say thanks for the help to everyone, I think I have a workable setup now...   >!
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Backward Engineering

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Re: Light Senor with Timer Possible for Controlling Landscape Lights?
« Reply #32 on: November 19, 2011, 08:21:56 PM »

Light Sensor Project Update

The 6V Solar Panel that I ordered was not available, so I have made a few changes to the design to work with a 5V Solar Panel.
I replaced the MOSFET with a logic level MOSFET that will work with the lower voltage.
This design will fit inside a PACTEC CNM-0000 plastic enclosure. (see attached)

I have also added an alternate design that uses a photo resistive sensor and requires a 3 wire connection.

Both designs should be fully compatible with X10 dimmers.

I have laid out a printed circuit board using ExpressPCB software and ordered 3 boards.  
Each board will have 2 each of the above mentioned designs for a total of 6 each boards on my order.
The boards will not arrive until 11/28/11.

I'm attaching a schematic of each design and will send a copy of the ExpressPCB files to anyone that provides an email address (send me a PM)
However you may wish to wait for my final progress report on the project.  At $65 per order, I don't plan on ordering more boards at this time.

I need to pull the schematics due to some design problems but I will re-post them once the problems are resolved.
« Last Edit: November 26, 2011, 10:22:58 AM by Backward Engineering »
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Backward Engineering

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Re: Light Senor with Timer Possible for Controlling Landscape Lights?
« Reply #33 on: November 20, 2011, 11:55:43 PM »

More background on controlling light loads (CFLs and LED lamps)

I found this very informative white paper on designing triac circuits that explains the importance of the triac's holding current.

I have attached the paper.

Don
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