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Old 07-04-2013, 08:58 PM   #1
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Photocell to turn circuit ON during day


I know, sounds crazy for a first post. I have an outdoor security sensor that uses a solar panel to charge its batteries. Unfortunately the place it needs to be mounted is under some trees and it does not get enough light, so in the middle of the night it dies and triggers a false alarm.

I want to install a 120v landscape light next to it that will come on during the day to charge the batteries. We have confirmed that this works. Thing is, this is at my 80 y/o mother's house and I feel a timer would be too much of a hassle for her. It would need resetting after a power outage, adjusted for shorter or longer days, etc.

I have not been able to find a product suitable for outdoors that would turn on a circuit when it is light out. I'm pretty handy and thought of building something myself, but not sure how to go about it. I think if I got an outdoor junction box of some type and mounted the sensor and some type of relay in it it would work. I just know nothing about relays.

Anyone know of a product that does this, or any detailed recommendations on how to go about building it? By details, I mean links to example components that would get the job done. I did find this one product, but it is a bit pricey and I don't like the way the sensor is opposite the outlets. Also not clear how weather proof it is for long term use.

http://engravingdragon.com/PhotoelectricSwitch.html

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Old 07-04-2013, 09:23 PM   #2
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Photocell to turn circuit ON during day


If you check the specs on some these units you find some with both NC and NO contacts.

http://www.automationdirect.com/adc/...251E_Models%29

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Old 07-05-2013, 12:44 AM   #3
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Photocell to turn circuit ON during day


If you go with the twistlock photocell and order a reversed operation aka tunnel photocell which it means the photosensor will turn the load on during day time then turn it off when it get dark.

There is one model it do come in my mind is Fisher Pierce FP7760-RA

That model number mention reversed action so it will run " backward " of normal photocells.

I really doubt the big box store will ever stock this item but check one of the electrical supply centre and mention that catalog number and they will able find it for ya.

Merci,
Marc
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Old 07-05-2013, 12:50 AM   #4
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Photocell to turn circuit ON during day


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Originally Posted by frenchelectrican View Post
If you go with the twistlock photocell and order a reversed operation aka tunnel photocell which it means the photosensor will turn the load on during day time then turn it off when it get dark.

There is one model it do come in my mind is Fisher Pierce FP7760-RA

That model number mention reversed action so it will run " backward " of normal photocells.

I really doubt the big box store will ever stock this item but check one of the electrical supply centre and mention that catalog number and they will able find it for ya.

Merci,
Marc
HA HA! Well I did not know that myself

Good man Marc....
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Old 07-05-2013, 12:55 AM   #5
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Photocell to turn circuit ON during day


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Originally Posted by HARRY304E View Post
HA HA! Well I did not know that myself

Good man Marc....

Now you know and learn something new all the time.

Merci,
Marc
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Old 07-05-2013, 07:32 AM   #6
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Photocell to turn circuit ON during day


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I feel a timer would be too much of a hassle for her. It would need resetting after a power outage, adjusted for shorter or longer days, etc.
You would have to put it inside, but this timer has a battery backup and it adjusts for length of day:

http://www.amazon.com/Intermatic-DT6...termatic+timer

Can be set to come on at dawn and off at dusk.
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Old 07-05-2013, 08:07 AM   #7
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Photocell to turn circuit ON during day


Why not have the light come on at night and keep the batteries charged? It will also act as a security light

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