Motion detection: PIR sensor
Let's detect some motion!
What are we going to do?
In this activity you'll learn how the PIR sensors work. A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors. We'll use it to turn a led on or off.
UNO board
You can use any Arduino UNO original or compatible board
USB cable
Depending on your board, you'll need a microUSB cable or a miniUSB cable
Computer
You need a computer with Arduino IDE software. If you don't have it, follow this link with instructions to download and install it.
PIR sensor brick
A PIR motion sensor brick with SVG connections
LED brick
A monocolor LED brick with integrated resistors and SVG connections
Let's get started
Follow these instructions carefully. You can click on some of the images to zoom in.
Always connect the components BEFORE powering the UNO board or YOU MAY DAMAGE YOUR BOARD OR COMPONENTS.
Instructions
2. Open Arduino IDE
Once you've opened the editor, download and open the code from HERE
3. Change code
If you follow the connections carefully, you won't need to change anything but if you want, you can always personalize it as long as you know what you're doing.
4. Upload to the board
Use the upload button to transfer the program to your board. Once done, you should read Upload completed. That means the transfer was succesful. If it's not succesful, try disconnecting your board and connecting it again and repeating the upload process.
5. Final result
After uploading, everything should be working as planned. Otherwise, double check connections and code.
Congratulations, you've done it! You're on the right path to be a maker! 🙂
Now, what else?
Now is your turn:
- Think about how would you modify the code so the sensor acts differently depending on the motion detection.
- Do you think you're capable of adding a buzzer from the previous activity and make it sound when motion is detected?
Pingback: Encoder and servo – makit
Pingback: Seven segment display – makit
Pingback: Inputs and outputs: button – makit