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 be used to drive an external load. A jumper allows you to set the sensor for single or continuous trigger output. The detection range is up to 20 feet.
Differences between Rev. A & Rev. B There is a Revision B of this sensor available which has some different features. The differences between the two versions is outlined below.
Rev. B also has LEDs under the lens that can light when motion is detected. Both versions use the same Fresnel lens, and you can run the same programs on them.
- Rev. A jumper setting controls trigger mode; Rev. B jumper setting controls distance.
- Rev. A requires a transistor or MOSFET to drive an external load; Rev. B can drive an external load directly.
- Rev. A power input range is 3.3V to 5V; Rev. B power input range is 3V to 6V with higher output current.
- Rev. A has through-hole components; Rev. B has surface-mount components plus mounting holes (making it slightly longer).
- Rev. A's header pins are straight, perpendicular to the PCB; Rev. B's header pins are 90°, parallel to the PCB.
Passive Infra-Red Sensor Module Features
- Detection range up to 20 feet away
- Jumper selects single or continuous trigger output mode
- 3-pin SIP header ready for breadboard or through-hole project
- Small size makes it easy to conceal
- Compatible with BASIC Stamp, Propeller, and many other microcontrollers
- Power Requirements: 3.3V to 5V DC; >3 mA (may vary)
- Communication: Single bit high/low output
- Operating temperature: 32 to 122 °F (0 to 50 °C)
- Dimensions: 1.27 × 0.96 × 1.0 in (32.2 × 24.3 × 25.4 mm)
Download PIR Sensor Rev. A User Manual