Features The power supply part of light control switch has diode protection, filter capacitor, anti-interference capacitor and 7805 voltage regulator chip, which can provide stable voltage and prevent the module from burning out because of the power supply reverse polarity. With a precision adjustable potentiometer to better adjust the sensitivity and delay time. The module is equipped with a high-power relay to control the load up to 10A current. Power indicator and relay pull-in indicator. The delay time can be adjusted to solve the flashing problem of the relay at the critical point of the light. The module comes with a 50cm long photoresistor sensor. Specification: Supply Voltage (Optional):   5V     12V   24V Static Current:                   12mA 15mA 12mA Max Power Consumption: 72mA 45mA 28mA   How to Use: 1. Wiring: First connect the corresponding DC power supply to DC+ and DC-; 2. Plug in the sensor probe and power on (Ensure that the voltage meets the requirements, the polarity cannot be reversed); 3. Delay Adjustment: The time range when plug in the jumper S2 is 1-20 seconds, otherwise the time range is 1-200 seconds. Adjusting the delay potentiometer clockwise will extend delay time. When adjusting the sensitivity, you must adjust the delay time to the shortest delay time of about 1 second (counterclockwise adjust for about 10 circles); 4. Sensor Sensitivity Adjustment: Adjust the sensitivity potentiometer in the light environment. If the sensor probe is covered by hand, the relay will pull in, let hand go and the relay will be disconnected, the module has induction function. Adjusting clockwise will make the induction more sensitive.   Application: The potentiometer can adjust the detection brightness threshold, when the light is darker than the brightness adjusted by the potentiometer, the relay switch is automatically turned on, can be used as light detection alarm, light control delay switch, brightness detection switch, can control various street lights (automatically turn on at night, automatically turn off during the day), auto headlights, stage lighting, LED lighting and traffic light detection switch   Package List: 1 x Photoresistor Relay Module  Package List