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This is a mini passive infrared sensor that it can sense movement of people, animals, or other objects
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This is a mini passive infrared sensor that it can sense movement of people, animals, or other objects. It features high sensitivity and instant reaction, commonly be used in burglar alarms and automatically-activated lighting systems.
The PIR Motion Sensor Series includes several products that will meet your different needs:
Want to know more about how the PIR sensor works with Arduino and Raspberry pi, please click here to view the blog. If you need tutorials for operating the sensor, please click here to view the wiki.
Low quiescent current
Compact layout design
Input voltage: DC 3-6V
Quiescent current: < 55uA
Detecting angle: < 100degree
Detecting distance: approx.7m/23 feet
Level output voltage: 3V/high, 0V/low
Trigger signal: High
Holding time: 20s
Operating temperature: -10-40℃
Dimensions: 28 x 13 x 13mm
To reduce the holding time, replace the timing resistor and capacitor with ones of lower value. The timing capacitor is on the underside of the board (same side as the 8-pin chip) next to the board's output pin and the chip's pin 5, and the timing resistor is also on the underside of the board, next to the board's Vcc pin and the chip's pin 8. The stock values are 1.6 nF for the capacitor and 510 kΩ for the resistor. The minimum value for the resistor is 100 kΩ. A simple way to reduce the hold time is to just remove the timing capacitor, replacing it with nothing. This worked for me but may not be reliable.
To enable retriggering, disconnect pin 7 of the chip from ground and connect it to Vcc.
Hi there, please connect gnd-->gnd, vcc-->5v, out-->digital port of arduino. thanks.
It means that after the sensor detects motion, it will hold its output high for 20 seconds. Also, it is not retriggerable, which means that if there's more motion after the first motion, it won't stay on for longer, but will turn off 20 seconds after the first motion. See my question about modifying it.
were you ever able to get it working? im having the same problem