I hope I'm not to far off posting this question on this forum. Some
years ago (10) we purchased 4 or 5 simple photovoltaic light switches
( I think they were made by First Alert). We're down to two
functioning now, and I cannot find these or anything near to them
anywhere (that I've looked!). They were simple plug in the wall then
plug your fixutre in and it cycled with day. My wife and I swear
First Alert took these off the market because they worked all to
well. Now all we see is digital timers etc etc. Anybody have any
leads and these simple devices?
Does this have any desirable hysteresis? Their K4123C control cycles 1200
watts of HIDs with a 2-minute period with about 6 footcandles of daylight,
esp if some of the light controlled reflects back into the sensor. I'm
thinking of adding a 1K resistor in series with the white wire and 39K
from there to the red wire to stop the cycling, which wears out the HIDs.
If you don't have your heart set on a photocell, you can also find an
astronomic digital timer to do the job. You set the time and what
part of the country you are in (there are different zones according to
the amount of sunlight during the day). Then forget about it.
I have one and every few years I have to change the battery and reset
the clock, in case it drifts. Other then that, no maintenance or
attention is required. See the link below.
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