Description
The PIR motion sensor works by constantly comparing the level of infrared radiation (IR) of the surrounding area. This allows the sensor to detect motion, and these sensors are commonly used for home automation — such as automated lighting systems — and for security systems.
This particular PIR motion sensor module uses an LHI778 Passive Infrared Sensor and a BISS0001 IC to control how motion is detected. The module features adjustable sensitivity that allows for a motion detection range from 3 meters to 7 meters, plus time delay adjustment and trigger selection that allow for fine tuning within your application.
This product can work on its own in conjunction with a relay module, even without a microcontroller. However, if you want to add more functionality than just turning on a device, you will need an Arduino.
Pins and Controls
Time Delay Adjust: Sets how long the output remains high after detecting motion, 5 seconds to 5 minutes
Sensitivity Adjust: Sets the detection range, 3 meters to 7 meters
Trigger Selection Jumper: Set for single or repeatable triggers
Ground Pin: Ground input
Output Pin: Low when no motion is detected, high when motion is detected. High is 3.3V
Power Pin: 5 to 20 VDC supply input
Specifications
Voltage: 5V – 20V
Power consumption: 65mA
TTL output: 3.3V, 0V
Delay time: Adjustable
Lock time: 0.2 sec
Trigger methods: L — disable repeat trigger, H — enable repeat trigger
Sensing range: Less than 120 degrees, within 7 meters
Temperature: −15°C to +70°C
Dimensions: 32 × 24 mm, distance between screws 28 mm, M2
Lens diameter: 23 mm
