Embedded Files
Lesson Overview
Lesson Overview
Students are able to understand the use of built-in sensors, namely temperature and light sensors.
Students are able to produce a bear project that uses a temperature or light sensor to trigger the production of light.
6.3.6 Make a presentation of the results that have been improved.6.4.2 Describe the hardware that will be used with the programming software.6.4.3 Produce a project flowchart that emits light, sound, and movement.6.4.5 Connect hardware for a product that emits light, sound, and movement.
Did you know?
Did you know?
Bears' body temperatures change when they hibernate in winter.
Bears' body temperatures change when they hibernate in winter.
When bears hibernate, their body temperature goes down, and their heart and breathing slow down too.
When bears hibernate, their body temperature goes down, and their heart and breathing slow down too.
Hmm... can micro:bit detect temperature changes like a bear?
Hmm... can micro:bit detect temperature changes like a bear?
micro:bit Built-in Sensors
micro:bit Built-in Sensors
micro:bit has built-in sensors such as temperature sensors and light sensors.
The built-in temperature sensor can detect the temperature around micro:bit.
The temperature detected by the micro:bit temperature sensor is slightly higher than the actual ambient temperature.
Example code using a temperature sensor.
The temperature variable block can be found in the Input block drawer.
The LED on the micro:bit board can also act as a light sensor to detect light around it.
The light sensor value goes from 0 (very dark) to 255 (very bright).
Example code using a light sensor.
Light level blocks are also available in the Input block drawer.
Let's learn how to use micro:bit built-in sensors.
Let's learn how to use micro:bit built-in sensors.
Video 10: Bear in the Dark
Video 10: Bear in the Dark
Watch and follow this video to get to know how to build a bear project that lights up the eyes if it’s dark.
Watch and follow this video to get to know how to build a bear project that lights up the eyes if it’s dark.
Materials needed to follow this video:
micro: bit + USB wire + 2 LEDs +2 alligator clips + 1 100ohm resistor
Computer
Visit makecode.microbit.org
Plastic bottle + colored paper + cardboard
Transcript
Hello world! Welcome back to the microbit series. I am Alina
and today we will create the
last animal in this series, which is the bear!
In the previous video we had made a tame lion with
a touch sensor to trigger the servo motor
using a loop selection control.
For this video, we will use
the light sensor and also the
temperature sensor that are on the
microbit board to switch on the external LED and use
the temperature sensor to display the ambient temperature on the microbit board.
Prepare all the project materials for this: colour paper,
recyclable plastic water bottle, cardboard, 2
LEDs, 1 resistor,
2 crocodile clips and your
microbit board.
We start off by making the bear's body first.
You can construct it using your own creativity
or follow my method. Cut out the shape of the bear from
the cardboard.
Cut the plastic water bottle to be the bear's body.
Like this.
Make a hole in the center of the bear's body.
The size of the hole is made just fine to put in
the microbit board.
Like this.
Make 2 holes for the eyes of the bear. Insert
the LEDs into the holes just now.
Short legs of LEDs are met and clipped to the resistor
and then to GND.
Long legs of both LEDs are clipped to pin 1.
We start off the coding by programming the bear to
display temperature through the LEDs on microbit.
Microbit has an in-built temperature sensor
inside the board. Temperature can be detected and stored
in the variable "Temperature" that can be accessed
by using the block "Temperature" that is in the drawer
"Input".
Use the forever block,
select "show number"
and put "Temperature" into the block
just now.
This will display the temperature through LEDs on the
microbit board.
Now, we want to use the light sensor to control
LEDs of the bear's eyes. The LEDs on the microbit board
can also function as the light sensor to detect
the light intensity around the microbit. The value that is read
by the light sensor is from 0, which is
very dark, to 255, which is very bright.
The value is stored in the variable "light
level"
that is in the drawer "Input".
Use the forever block just now. Put in the block
"If true then, else".
Use the comparison block to display if the light
level is less than 100, switch on the external LEDs.
Programming blocks for the external LED are inside the drawer
"Pins". Click and pull out "digital write pin P0 to
1" to switch on the LEDs.
Don't forget to change P0
to P1.
Else, use "digital
write pin
P0". Change P0
to P1
to 0
to switch off LEDs.
Connect microbit to the computer
by
using a USB cable.
Press download on the software and save the programming file
into the microbit.
Observe the microbit board to check the surrounding temperature.
We can see 21
27 degree Celsius.
Cover the microbit board to turn on the light of the bear's eyes.
Tidy up your project and try to arrange the wires and microbit board
so that they are not seen from the front. The bear project is done!
As for the challenge, try to use
the temperature sensor and the
light sensor
to trigger other events instead!
Happy trying!
and today we will create the
last animal in this series, which is the bear!
In the previous video we had made a tame lion with
a touch sensor to trigger the servo motor
using a loop selection control.
For this video, we will use
the light sensor and also the
temperature sensor that are on the
microbit board to switch on the external LED and use
the temperature sensor to display the ambient temperature on the microbit board.
Prepare all the project materials for this: colour paper,
recyclable plastic water bottle, cardboard, 2
LEDs, 1 resistor,
2 crocodile clips and your
microbit board.
We start off by making the bear's body first.
You can construct it using your own creativity
or follow my method. Cut out the shape of the bear from
the cardboard.
Cut the plastic water bottle to be the bear's body.
Like this.
Make a hole in the center of the bear's body.
The size of the hole is made just fine to put in
the microbit board.
Like this.
Make 2 holes for the eyes of the bear. Insert
the LEDs into the holes just now.
Short legs of LEDs are met and clipped to the resistor
and then to GND.
Long legs of both LEDs are clipped to pin 1.
We start off the coding by programming the bear to
display temperature through the LEDs on microbit.
Microbit has an in-built temperature sensor
inside the board. Temperature can be detected and stored
in the variable "Temperature" that can be accessed
by using the block "Temperature" that is in the drawer
"Input".
Use the forever block,
select "show number"
and put "Temperature" into the block
just now.
This will display the temperature through LEDs on the
microbit board.
Now, we want to use the light sensor to control
LEDs of the bear's eyes. The LEDs on the microbit board
can also function as the light sensor to detect
the light intensity around the microbit. The value that is read
by the light sensor is from 0, which is
very dark, to 255, which is very bright.
The value is stored in the variable "light
level"
that is in the drawer "Input".
Use the forever block just now. Put in the block
"If true then, else".
Use the comparison block to display if the light
level is less than 100, switch on the external LEDs.
Programming blocks for the external LED are inside the drawer
"Pins". Click and pull out "digital write pin P0 to
1" to switch on the LEDs.
Don't forget to change P0
to P1.
Else, use "digital
write pin
P0". Change P0
to P1
to 0
to switch off LEDs.
Connect microbit to the computer
by
using a USB cable.
Press download on the software and save the programming file
into the microbit.
Observe the microbit board to check the surrounding temperature.
We can see 21
27 degree Celsius.
Cover the microbit board to turn on the light of the bear's eyes.
Tidy up your project and try to arrange the wires and microbit board
so that they are not seen from the front. The bear project is done!
As for the challenge, try to use
the temperature sensor and the
light sensor
to trigger other events instead!
Happy trying!
After watching this video, it’s your turn to try the assignments and challenges! They are:
After watching this video, it’s your turn to try the assignments and challenges! They are:
Display the ambient temperature on the micro:bit board and turn on the LED on the bear's eye when the micro:bit board is in a dark environment
Modify the temperature and light sensor programs to make different events
👉CLICK HERE👈 to try it on makecode.
Practice in the Video
Practice in the Video
Ways to build code.
End product.
Read the lesson notes below to deepen your understanding.
Read the lesson notes below to deepen your understanding.
Advanced Challenge
Advanced Challenge
Use all the skills you’ve learned to make a final project!
Use all the skills you’ve learned to make a final project!
Project criteria:
Use inputs to trigger the production of light, sound, and movement.
Draw a flow chart for your project.
Example of Student Projects
Example of Student Projects
Cat Project
Cat Project
Moves the hand when its tail is touched.
Plays music when button A is pressed.
Displays light level value when button B is pressed.
Chicken Project
Chicken Project
Moves the body when the eating place is touched.
Lights up the LED eye when the environment is dark.
Plays music when buttons A and B are pressed.
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