Introduction
All objects in the universe emit some level of IR radiation, which release as heat. This motion sensor is designed to detect changes in infrared radiation thereby detecting the presence of a moving human or animal, and then output digital signal. It can be widely used with controllers like Arduino, micro:bit to complete human presence detection.
Specification
- Operating Voltage: 3V-5V
- Operating Current: TBD
- Sensing Distance: 7m
- Sensing Angle: 100°
- Output Delay Time(High level): about 2.3 to 3s
- Interface: PH2.0-3P
- Dimension: 26×22mm/1.02×0.87"
- Signal: digital (0 or 1)
Pinout
| Label | Name | Description |
|---|---|---|
| 1 | GND | Negative |
| 2 | VCC | Positive |
| 3 | SIGNAL | Digital line |
Usage Description
When people enter the detecting zone of the motion sensor, it outputs a switch signal (High Level). The motion sensor can sense the moving objects within 7m in 100° sensing angle. Please kindly note that there would be 2.3 to 3s delay.
Principle
Generally, human beings maintain a constant temperature of 37℃ so they emit infrared rays of specified 10UM wavelength. The built-in IR probe of the motion sensor is able to detect the IR radiation emitted by the human body. The IR radiation will be focused on the pyroelectric part after being collected by a Fresnel lens. Next, the charge balance of the pyroelectric element will be broke when it feels the change of the temperature of the infrared radiation, and then it will release charge to produce electrical signal.
Application
1. Smart Fan
Description: When human movement detected, the fan turns on. Otherwise, the fan stops.
Components:
 |
 |
 |
|---|---|---|
| BOS0013 Motion sensor | BOS0021 Fan Module | BOS0035 Mainboard-IO |
 |
 |
|
| BOS0040 micro:bit BOSON expansion board | MBT0039 micro:bit |
Non-programming
Connection Diagram:
Programming
Connection Diagram:
Flowchart
Mind+ Sample Program:
MakeCode Sample Program:
Video Demo
| Non-programming | Programming |
|---|---|
 |
 |
2. A Gift for Teacher's Day
Description:
Record a greetings for your teacher. When he walks into the classroom and the motion sensor detects the movement, the LED lights up, and the speaker starts playing the recordings.
Components:
 |
 |
 |
|---|---|---|
| BOS0013 Motion Sensor | BOS0017 LED Module | BOS0022 Voice Recorder Module |
 |
 |
 |
| BOS0030 Splitter Module | BOS0035 Mainboard-3IO | MBT0039 micro:bit |
 |
||
| BOS0040 micro:bit BOSON expansion Board |
Tip: micro:bit and micro:bit BOSON expansion board will be used in programming projects.
Non-programming
Connection Diagram:
Programming
Connection Diagram:
Flowchart:
Mind+ Sample Program
MakeCode Sample Program
Video Demo
| Non-programming | Programming |
|---|---|
 |
 |
3. Intelligent Streetlight (Programming)
Description:
At night, when people passing by the streetlight, the sound sensor detects the sound and motion, the LED lights up for 10s.
Components:
 |
 |
 |
|---|---|---|
| BOS0013 Motion Sensor | BOS0004 Ambient Light Sensor | BOS0017 LED Module |
 |
 |
|
| BOS0040 micro:bit | MBT0039 micro:bit |
Connection Diagram:
Tip: Thresholds for the ambient light sensor and sound sensor should be adjusted according to actual environment.
Flowchart
Mind+ Sample Program
MakeCode Sample Program
Video Demo
| Programming |
|---|
 |
FAQ
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