100% Brand New and High Quality Material: Electrical Components Color: See Picture Description: Jumper module Product Description Stable version of the module uses a 12V power supply, no delay function. Relay pulls in when dark, disconnects when light. Applications: Light detection and brightness detection. The detection threshold can be adjusted via the potentiometer. When the threshold is reached, the relay activates, controlling various devices. It can be used for automatic street lighting control (on at night, off during the day), car power control, and automation equipment. Module Features: 1. Uses a photoresistor to sense light intensity, with a relay to directly control loads. 2. Sensitivity adjustment: The start relay threshold is set by adjusting the potentiometer. When it gets darker than this threshold, the module's relay activates; when it gets brighter than this threshold, the relay deactivates. 3. 12V power input is designed with a regulator transistor for the relay board, providing stable and reliable sensor operation. 4. Built-in optocoupler isolation drive relay effectively protects the chip, making the product more reliable. 5. Four fixed bolt holes for easy installation. Module Usage Instructions: 1. The photoresistor module is most sensitive to ambient light and is typically used to detect ambient light intensity. 2. When the ambient light is darker than the set threshold, the relay activates. The common terminal and the normally open terminal are connected. When the external ambient light is brighter than the set threshold, the relay deactivates, and the common terminal and the normally closed terminal are connected. 3. The common, normally open, and normally closed ports correspond to a double-throw switch. When the relay coil is energized, the common terminal conducts with the normally open terminal; when the relay is de-energized, the common terminal conducts with the normally closed terminal. Electrical Parameters: Power Supply Voltage: 12VDC Current: >100mA Load: 250V 10A AC or 30V 10A DC (current within this range can be used) Size: See Picture No Retail Package Quantity: 1 pc Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!