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Parallax 555-28027 Manual
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Parallax 555-28027 Manual

Pir sensor kickstart
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Parallax PIR Sensor KickStart (#555-28027)
What It Can Do
Detects motion of humans or animals from as far away as 30 feet
•
Silent operation for alarms, motion activated nightlights, holiday props
•
Automatically resets after period of inactivity
•
Passive infrared (PIR) sensors detect motion by comparing the amount of infrared radiation that
reaches a pair of detectors. When the two detectors "see" different values, the sensor indicates it
as movement of an object, such as a person or an animal. PIR sensors are often used in driveway
security systems, which turn on a light (but only at night) when someone approaches the house.
The Parallax PIR Motion Sensor has a simple on/off output: when on, the sensor is detecting
movement. When movement stops the output turns off (after a short delay). The output of the
sensor can be directly connected to a microcontroller, and operates much like a switch. You can
use the on/off condition to directly read the current status of the PIR sensor.
A selectable jumper on the sensor lets you set working distance:
L (for Long) position, the effective sensor distance is up to 30 feet. This increases the sensitivity
•
of the sensor, which may also cause more false triggers.
S (for Short) position, the sensor distance is up to 15 feet.
•
Copyright © Parallax Inc.
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Summary of Contents for Parallax 555-28027

  • Page 1 (but only at night) when someone approaches the house. The Parallax PIR Motion Sensor has a simple on/off output: when on, the sensor is detecting movement. When movement stops the output turns off (after a short delay). The output of the sensor can be directly connected to a microcontroller, and operates much like a switch.

  • Page 2: Parts List

    This KickStart is for Rev B of the PIR Motion Sensor. Earlier versions of the sensor operate in a slightly different manner. Check the Parallax website for information on using earlier versions of the sensor.

  • Page 3: Basic Wiring

    The sensor will remain triggered as long as there is continuous movement in front of it. Once motion stops, the sensor resets itself after approximately 10 seconds. BASIC Stamp HomeWork Board Copyright © Parallax Inc. Page 3 of 6...
  • Page 4 Note: When this program is run, the BASIC Stamp Debug Terminal will automatically open. Propeller BOE and Propeller QuickStart Propeller BOE Wiring Diagram Propeller QuickStart Wiring Diagram pst : "Parallax Serial Terminal" ' Use Serial Terminal object _clkmode = xtal1 + pll16x ' Set clock mode...
  • Page 5 + cnt) ' Small delay Note: This program uses the Parallax Serial Terminal object library, which is included with the Propeller Tool software download. Note: To view the results of the demonstration, after uploading is complete run the Parallax Serial Terminal from the Run menu, or press F12.
  • Page 6 For More Information View the PIR Motion Sensor (#555-28027) product page for full documentation. • PIR Mini Sensor (#28033) offers similar functionality as the PIR Sensor (Rev B), built in a • smaller module. Wide Angle PIR Sensor (#28032) provides a larger 180˚ field of view •...