Simple circuit able to automatically activate a load (lamps, etc.) when the the brightness in the room drops below a threshold that can be set as desired (adjustable via trimmer). The switch will return to the initial condition as soon as the brightness level reaches the preset level. It has relays with contact output (common, open and closed), status LED for power supply and relay activation.

• Light threshold can be adjusted by potentiometer to set the relay start
• Input: DC 12V
• Load capacity: 10A / AC 250V or DC up to 30V
• RED LED ON: Indicate the Power ON
• BLUE LED ON: Relay is working
• Module output terminal has three ports
• Normally open ( NO )
• Common terminal ( COM )
• Normally closed ( NC )
• Size: 30mm*53mm