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PIR Sensor (Rev B)

555-28027: PARALLAX INC. View Larger Image
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Jameco Part no. 2082927
Manufacturer PARALLAX INC.
Manufacturer no. 555-28027
Catalog 151 , page 154
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PIR Sensor (Rev B)

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. Click over to the KickStart Guide to see how to use the PIR sensor, complete with wiring diagrams and sample code for the BASIC Stamp, Propeller, and Arduino.

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


Detection range up to 15 ft away on short setting, up to 30 ft away on long setting
  • Jumper selects short or long settings
  • Directly drive a load
  • 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; 12 mA @ 3 V, 23 mA @ 5 V
  • 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)

Downloads & Resources:

KickStart Guide complete with wiring diagrams and sample code
555-28027 PIR Sensor RevB v2.1 (.pdf)

Note: All specifications for this product are approximate and subject to change without notice.

Parallax 555-28027 PIR Sensor back view
Back view of sensor

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