use:
Light detection, brightness detection, through the potentiometer can be adjusted to detect the brightness of the valve point, comes with relay, do a variety of brightness detection switch.
Module Features:
1, the use of photosensitive resistance induced light intensity, comes with a relay, direct control of the load
2, with the potentiometer to adjust the sensitivity, by adjusting the potentiometer, set the start relay threshold, when the light is on, the module relay pull, hidden in this threshold, the relay disconnected.
3, the working voltage 12V
4, the output form: directly AC 220V 10A or DC30V 10A load
5, with four fixed bolt holes, easy to install
6, small board PCB size: 5cm x 2.6cm
7, using a wide voltage LM393 comparator

Module instructions:

1, photosensitive resistors are sensitive to ambient light and are generally used to detect the brightness of the ambient light.
2, the module in the ambient light exceeds the set threshold, the relay pull, the common side and normally open end, when the ambient light below the set threshold, the relay is off, the common end and normally closed end;
3, the common, normally open, normally closed three ports is equivalent to a dual control switch, the relay coil has electricity, the common and often open at the beginning, no electricity, the common and normally closed end conduction;

Electrical parameters:
Supply voltage: 12VDC
Current: greater than 100mA
Load: 250V 10A AC or 30V 10A DC