Light sensor for OFF at dusk and ON at daylight?

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I'm interested in finding a light sensor/110V outlet combination
that turns things off at dusk an on at daylight, instead of the
other way around as most of them do. Can anyone suggest where to
get such a thing, or where else I can ask about it?

Thanks for any help!
David

Re: Light sensor for OFF at dusk and ON at daylight?
I have never heard anyone who wanted that.  I doubt that anyone makes a
standard product for it (at any reasonable price).
The easiest way to get that would be to buy a standard one and put a relay
after it to invert the output.

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Re: Light sensor for OFF at dusk and ON at daylight?
dh@. wrote the following:
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I suppose you would have to rewire the light sensor so it works in reverse.

--

Bill
In Hamptonburgh, NY
In the original Orange County. Est. 1683
To email, remove the double zeroes after @

Re: Light sensor for OFF at dusk and ON at daylight?
On Oct 17, 11:05=A0pm, dh@. wrote:
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You could use two light sensors in a box (with ventilation!).  The
first looks at the world while the second looks at the light on the
first sensor.

Re: Light sensor for OFF at dusk and ON at daylight?

discussion :
8fd119b3-bc27-448d-b6fb-5e45c597aa16@g13g2000yqj.googlegroups.com...
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Just put a 110 volt realy at the place of the lamp connection in a simple
dusk detector and use a N.C. connection on it to feed what ever you want..
if the relay is OFF (when the detector see some light) the currenty pass ..
simple simple simple..


Re: Light sensor for OFF at dusk and ON at daylight?
wrote:

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    That idea worked great. It's probably the way I'll go with it

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    I'm interested in trying that but don't know an easy place to
get the relay, or what an N.C. connection is. I did however get
two light sensors like "Stubby" suggested and it seems to work
pretty well.

Re: Light sensor for OFF at dusk and ON at daylight?
On 10/26/2010 7:38 AM, dh@. wrote:
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parts-express.com has relays for many different voltages. A 120 volt
relay is about $10.00. The N.C. connection is the "normally closed"
connection. It is a closed circuit before the relay is activated. It
opens upon activation. The opposite is the normally open connection
which is the opposite of the normally closed.

The relay is small, does not require much power (none when it is not
activated). It doesn't put out heat, and it is easy to wire into a
circuit. It  does seem like a better choice than the two light suggestion.
--
Jim

Re: Light sensor for OFF at dusk and ON at daylight?
wrote:

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    I might eventually try it, but I've been trying out the two
sensor approach for several days now and it seems to be working
great. I plan to replace the incandescent nightlight I'm using
with an LED light, and may just leave it at that.

Re: Light sensor for OFF at dusk and ON at daylight?


oupdc69uqe1sqgqms7ten06vsqbhqp3o9k@4ax.com...
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110 volt relay are very easy to find..
look there
http://www.radioshack.com/product/index.jsp?productId=2049721&numProdsPerPage=60
you will even see the base for it on the same page..
http://www.radioshack.com/product/index.jsp?productId=2062476&clickid=prod_cs

the schematics of the connection inside the relay is on the top of the
plastic cover.. very easy to work with..



And a N.C. connection is a NORMAL CLOSED connection, so the part of a switch
that normally (without power to the relay) is normal a closed circuit..
(passing current)



 


Re: Light sensor for OFF at dusk and ON at daylight?

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What are you using it for?  Could a timer work instead?.  Just curious, I
might learn something.



Re: Light sensor for OFF at dusk and ON at daylight?
On Sun, 31 Oct 2010 07:20:22 -0500, "Dr.Smith"

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    I'm using it to light a bird cage. I wanted the lights to go
along pretty much with day and night cycles for the area we are
in, and was going to use timers and change the settings every
couple of weeks or whatever, but even if I got that going
smoothly a power failure would mess things up. So the idea of
letting the sun do it since that's what I'm trying to simulate
seemed like the best way to go, and still does.

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