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Forum My photocell for outdoor lighting does not light up if power went during off the day
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My photocell for outdoor lighting does not light up if power went during off the day

cksimkoza4
cksimkoza4 over 1 year ago

and it comes during the night.what could be the problem

image

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  • DAB
    DAB over 1 year ago +1
    I am not sure about your unit, but on my outside lights, I can "set the state" of mine by turning the power on and off. If I just toggle the switch, the light comes on and stays on. If I turn it off…
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  • kmikemoo
    0 kmikemoo over 1 year ago

     cksimkoza4  The translation to English for me might not be working correctly.  What you have described is what I call "A horrible case of the 'Normals'".  The circuit is responding exactly as it is designed to do.  The system response is triggered / activated by light - not mains power.

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  • kmikemoo
    0 kmikemoo over 1 year ago

     cksimkoza4  The translation to English for me might not be working correctly.  What you have described is what I call "A horrible case of the 'Normals'".  The circuit is responding exactly as it is designed to do.  The system response is triggered / activated by light - not mains power.

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  • JWx
    0 JWx over 1 year ago in reply to kmikemoo

    maybe it is edge triggered - and not getting state change from "light" to "darkness" when powered up during the night (and not powering up outdoor lights as supposed). Maybe some backup battery for the detector would help if power interruptions are frequent?

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  • cksimkoza4
    0 cksimkoza4 over 1 year ago in reply to kmikemoo

    By the way I'm new to electronics, but initially the sensor used to behave normaly such that when its during the day the security lights are off due to the increase in light intensity, and when it becomes dark(night) security lights turn on automatically. It operates like this when there is power from the mains the whole day,  but now when power goes off at night (blackout) and comes back on, the security lights remain turned off, but initially when we justed installed the photocell it used to automatically turn on the security lights even after blackout 

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  • JWx
    0 JWx over 1 year ago in reply to cksimkoza4

    maybe lighting conditions during the night has changed? let's suppose that this sensor has three states "definitely day", "intermediate  state" and "definitely night", and in "intermediate  state" it's behavior depends on previous state. In this case, when some times ago night was darker than now, it correctly interpreted it every time as "definitely night", but now it is fitting into "intermediate  state", which is working correctly when it "sees" difference from day to this "intermediate  state" but not when it powers-up in this state? Maybe there is some sensitivity potentiometer that can be tuned (after remembering current position for easy return if it doesn't work)?

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  • kmikemoo
    0 kmikemoo over 1 year ago in reply to cksimkoza4

    cksimkoza4 Thank you.  I understand much better now.  I do not have a solution.  I do have occupancy sensors that behave similarly when the returning mains power is from my battery inverter.  They only reset when powered by utility power.  This validates JWx's suggestion that it could be an edge triggering issue - at least in my mind.  If you were able to reset the mains power to the circuit after the lights failed to come back on, do they behave correctly?  Power quality is terrible as mains power returns - with everything trying to restart.

    The other crazy idea is if your photosensor has analog potentiometers.  Sometimes these items get oxidized.  Note the position of the pointer.  Turn left, right, left right, and back to the original position.  While simple, I have corrected many sensing problems this way.

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