📄️ Light Sensor
LIGHT is a light intensity sensor. The resistance of a photoresistor decreases with increasing incident light intensity.
📄️ PIR - Move Sensor (AS312)
PIR sensor (passive infrared detector) is used to measure infrared (IR) light radiating from objects. The suggested distance is 150 cm (about 5 feet). The sensor has a "cooling time" when it detects motion which is approximately 3000 ms (about 3 sec).
📄️ Single Relay unit
Relay Unit can be used as an electrically operated switch, uses an electromagnet to mechanically operate a switch, where it is necessary to control a large power load circuit by a separate low-power signal, like a digital signal output from a microprocessor. Up to 30V DC and 220V AC.