Mini Basic PIR Sensor (BL412)

Runs on 3.3V power - so make sure if you're interfacing with an Arduino or other 5V chip, you power it from the 3V regulator. Digital signal output is 3.3V high/low and you can change the length of time the signal pin stays high by connecting a resistor divider to the second pin, from 2 seconds (0V) up to one hour (3.3V) - see the datasheet 'on time' table for recommended resistor values.

To use, see datasheet page 7 pin-out diagram:

• Connect pin #1 to ground
• Connect pin #2 to ground (on time of 2 seconds)
• Connect pin #3 to 3.3V
• Check signal on pin #4

The snap-on lens is focused to 5 meters away with a 120 degree spread, but should work from about 3 to 8 meters. 

The BL sensor window is 5mm x 3.8mm. We also carry the BS412 PIR sensor which has a smaller sensing element.

Note: PIR sensors and the Raspberry Pi sometimes don't get along - if you're having false trigger reports, make sure the PIR Sensor is far away from the Pi.

Documents:

• Specification Sheet
• Lens Diagram