The PIR Sensor detects motion by measuring changes in the infrared (heat) levels emitted by surrounding objects. When motion is detected the PIR sensor outputs a high signal on its output pin.

NOTE: The product information found on this page currently pertains to Revision B of this product, which provides many updates and features from Revision A. Some of these include:

• Longer detection range, selectable by onboard jumper
• Wider supply voltage, from 3 to 6 VDC
• Higher output current provides for direct control of an external load
• Mounting holes included for permanent projects
• All parts SMT

Key Features:

• Typically detects a person up to approximately 30 ft away, or up to 15 ft away in reduced sensitivity mode
• Jumper selects normal operation or reduced sensitivity
• Approximately 90 degree field of view
• Onboard LEDs light up the lens for fast visual feedback when movement is detected  
• Mounting holes for 2-56 sized screws provide easy integration in permanent applications  
• 3-pin SIP package perfect for breadboard-friendly projects  
• Easy communication with any microcontroller  
• Small size makes it easy to conceal

Application Ideas:

• Motion-activted nightlight
• Alarm system
• Animated holiday props

Details:

• Source current up to 12 mA @ 3V, 23 mA @ 5V
• Voltage requirements: 3 to 6 VDC
• Current requirements: 130 uA idle, 3 mA active (no load)
• Communication: Single bit high/low output
• Dimensions: 1.41 x 1.0 x 0.8 in (3.6 x 2.5 x 2.0 cm)
• Operating temp range:  32 to 122 °F (0 to 50 °C)

Resource:

• PIR Sensor Rev  Product Guide

Additional Resources:

• PIR Motion Sensor - Propeller C Tutorial (Parallax Learn)
• PIR Triggered Relay Circuits Mini-Project (Parallax Forum)
• KickStart Circuits & Code for BASIC Stamp, Arduino, Propeller Spin (Parallax Learn)

Package Includes:

• 1 x Parallax 555-28027 PIR Sensor with LED Signal