Light Sensor / Controller

[tytower]

I bought a dozen of these units
http://www.ebay.com.au/itm/301101029807?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

I expected them to turn on or off at dark but in testing putting 24 volts on the red and black wires and an led  with resistor to test from red to white  Led Lights in daylight  and when darkened the units relay pulls in about 4 seconds later for only about a tenth of a second  then its back the way it was .

Need to use them to switch on LED spotlights at night .

Anybody know how to use them?

[BradC]

but in testing putting 24 volts on the red and black wires and an led  with resistor to test from red to white  Led Lights in daylight  and when darkened the units relay pulls in about 4 seconds later for only about a tenth of a second  then its back the way it was .

Anybody know how to use them?

Did you read the color code on the label before you wired it up ? Sounds like you are powering it via the led and when the relay pulls in it just drops back out from under-voltage.

[tytower]

If you expand the bottom picture you will see the reason for  confusion printed on the wiring labels . I don't know how it should be wired so I assumed red to be pos black to be neg and white to be the output . . I have a power supply up to 5 amps and the LED is just to test them .

I see your point though and did try different setups without response.

[tytower]

Turned out that the red and white wires are swapped to what we would normally expect . I resoldered them right on the board and all works as expected with the above wiring