Key Highlights *Supply Voltage 5V Output 3.3V TTL Logic Infrared Sensor with Control Circuit Board The Sensitivity and Holding Time Can be Adjusted Can cover 120° and 7m range Low power consumption 65mA Temperature Range -20°C to 80°C Discription- To ensure the safety and security of our homes or anywhere, it is essential we install alarm systems. Motion sensors are one of the essential components of these systems. We can also employ PIR (Passive Infrared) Sensors for doing the same. HC-SR501 is a low-cost PIR sensor that can detect the presence of humans or animals by sensing the Infrared Radiation coming out of the body. Its sensitivity can be controlled by sensitivity control potentiometer and it also has an onboard signal conditioning circuitry and Fresnel Lens to improve its field of view. It is used in Motion Activated lights in bathrooms, halls, rooms, etc. in alarm applications, etc.