The PIR (Passive Infra-Red) Sensor is a pyroelectric device that 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. This logic signal can be read by a microcontroller or used to drive an external load. Dual output modes and a sensible design that performs within stated datasheet specifications are a few reasons over 100,000 units are in use around the world.
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
Features:
- Detect a person up to ~30 ft. away, or up to 15 ft. away in reduced sensitivity mode
- Jumper selects normal opereration or reduced sensitivity
- Source current up to 12 mA @ 3 V, 23 mA @ 5 V
- Onboard LEDs light up the lens for fast visual feedback when movement is detected
- Mounting holes for 2-56 sized screws
- 3-pin SIP header ready for breadboard or through-hole projects
- Small size makes it easy to conceal
- Easy interface to any microcontroller
Application Ideas:
- Motion-activated nightlight
- Alarm systems
- Holiday animated props
Key Specifications:
- Power requirements: 3 to 6 VDC; 130 µA idle, 23 mA active (no load)
- Communication: Single bit high/low output
- Dimensions: 1.41 x 1.0 x 0.8 in (35.8 x 25.4 x 20.3 cm)
- Operating temp range: 32 to 122 °F (0 to 50 °C)
Note: All specifications for this product are approximate and subject to change without notice.
Back view of product.
Downloads & Resources:
555-28027 PIRSensor RevB v2.2 (.pdf)
Example KickStart Circuits & Code (offsite)