PIR Motion Sensor Module HC-SR501

PIR Sensor Module (Passive Infra-Red ) Sensor is an electronic semiconductor-type sensor that measures infrared (IR) light radiating from objects in its field of view. This module detects and gives a trigger when there is any motion by a heat-radiating object in its range of view. This sensor is passive as it does not emit or radiate any energy for detection. Every object above absolute zero emits heat, this heat signature is in Infrared wavelength which cannot be seen by the naked eye but can be measured by infrared devices. This Sensor is covered with Fresnel Lenses, which create a wide angle of detection and are also used for noise filtering. This PIR includes an adjustable delay before firing (approx 0.5 – 200 seconds), and has adjustable sensitivity.

Specification:

• Working voltage: 5V – 20V
• Power Consumption: 65 mA
• TTL Output: 3.3V
• Lock Time: 0.2 sec
• Trigger Methods:
  • L- Disable Repeat Trigger
  • H- Enable repeat Trigger (Default)
• Sensing range: less than 120 degrees, within 7 meters
• Temperature: – 15 ~ +70
• Dwell time: (Stay-ON time) adjustable between 5-300 Seconds