Project: Boolean

Two-Player Game Example Board

This is an assignment for students to come up with a micro:bit program that uses Boolean variables, Boolean operators, and possibly the random function.

Input

Remind the students of all the different inputs available to them through the micro:bit.

micro:bit input list

Project Ideas

Sunscreen Monitor

When you shake the micro:bit, it reports the current temperature in degrees Fahrenheit. Button B measures the light level and if it is above 70 degrees AND very bright, it will display a sun icon. If it is above 70 degrees and less bright, it will display a cloudy symbol. If it is dark, it will display a nighttime icon.

micro:bit Sunscreen Monitor

Sunscreen code

input.onButtonPressed(Button.B, () => {
    if (128 > input.lightLevel() && 0 < input.lightLevel() && input.temperature() > 22) {
        basic.showLeds(`
            . # . # .
            # . . . #
            . . . . .
            . . . . .
            . . . . .
            `)
basic.showLeds(`
            . # # # .
            # . . . #
            . . . . .
            . . . . .
            . . . . .
            `)
basic.showLeds(`
            . # # # .
            # . . . #
            . # . # .
            . . . . .
            . . . . .
            `)
basic.showLeds(`
            . # # # .
            # . . . #
            . # # # .
            . . . . .
            . . . . .
            `)
basic.showLeds(`
            . . . . .
            . # . # .
            . . . . .
            . # # # .
            # . . . #
            `)
    } else {
        basic.showLeds(`
            # . . . .
            . . . . .
            . . . . .
            . . . . .
            . . . . .
            `)
basic.showLeds(`
            . # . . .
            # # . . .
            . . . . .
            . . . . .
            . . . . .
            `)
basic.showLeds(`
            . . # . .
            . . # . .
            # # # . .
            . . . . .
            . . . . .
            `)
basic.showLeds(`
            . . # # .
            . . # . .
            # # # . .
            # . . # .
            . . . . .
            `)
basic.showLeds(`
            . . # # #
            . . # . .
            # # # . .
            # . . # .
            # . . . #
            `)
basic.showLeds(`
            . . . . .
            . # . # .
            . . . . .
            # . . . #
            . # # # .
            `)
    }
})
input.onButtonPressed(Button.A, () => {
    if (input.temperature() < 22 && input.temperature() > 6) {
        basic.showLeds(`
            . . . . .
            . . . . .
            . . # . .
            . . . . .
            . . . . .
            `)
basic.showLeds(`
            . . . . .
            . . # . .
            . # # # .
            . . # . .
            . . . . .
            `)
basic.showLeds(`
            . . . . .
            . . . . .
            . . . . .
            . . . . .
            . . . . .
            `)
basic.showLeds(`
            # # # # #
            # # # # #
            # # # # #
            # # # # #
            # # # # #
            `)
    } else {
        basic.showLeds(`
            . . . . .
            . . . . .
            . . # . .
            . . . . .
            . . . . .
            `)
basic.showLeds(`
            . . . . .
            . . . . .
            . # # # .
            . . . . .
            . . . . .
            `)
basic.showLeds(`
            . . . . .
            . . . . .
            . . . . .
            . . . . .
            . . . . .
            `)
basic.showLeds(`
            # # # # #
            # . . . #
            # . . . #
            # . . . #
            # # # # #
            `)
    }
})
input.onGesture(Gesture.Shake, () => {
    basic.clearScreen()
    basic.showNumber(input.temperature() * 2 + 32)
})

Button A displays an animation to tell you whether or not you should use sunscreen (on sunny or cloudy days but not at night or indoors.)

Make a holder that can hold the micro:bit and a bottle of sunscreen.

This example uses boolean operations because both light level AND temperature must be high in order to trigger the sun icon:

if (128 > input.lightLevel() && 0 < input.lightLevel() && input.temperature() > 22) {}

Two-player game

Create a game in which two players take turns on the same micro:bit. You can use a boolean variable called PlayerATurn to keep track of whose turn it is.

Board Game: Use boolean variables and random values as part of a board game (or improve your Board Game from the Variables lesson). Make the board and pieces and a holder for the micro:bit. Try modding a current board game.

Two player game project Board Game with Arrows

Board game arrow code

let player1Turn = false
let spin = 0
let delay = 0
input.onGesture(Gesture.Shake, () => {
    if (player1Turn == true && Math.randomRange(0, 4) < 3) {
        basic.clearScreen()
        delay = 0
        while (delay < 500) {
            basic.showLeds(`
                . . # . .
                . # # . .
                # # # # .
                . # # . .
                . . # . .
                `)
            delay += 50
            basic.pause(delay)
            basic.showLeds(`
                . . # . .
                . # # # .
                # # # # #
                . . # . .
                . . . . .
                `)
            delay += 50
            basic.pause(delay)
            basic.showLeds(`
                . . # . .
                . . # # .
                . # # # #
                . . # # .
                . . # . .
                `)
            delay += 50
            basic.pause(delay)
            basic.showLeds(`
                . . . . .
                . . # . .
                # # # # #
                . # # # .
                . . # . .
                `)
            basic.pause(delay)
            delay += 50
            player1Turn = false
        }
    } else if (player1Turn) {
        basic.showString("Crash!")
        player1Turn = false
    } else if (Math.randomRange(0, 4) < 3) {
        basic.clearScreen()
        delay = 0
        while (delay < 500) {
            basic.showLeds(`
                . . # . .
                . # # . #
                # # # # #
                . # # . #
                . . # . .
                `)
            delay += 50
            basic.pause(delay)
            basic.showLeds(`
                . . # . .
                . # # # .
                # # # # #
                . . # . .
                . # # # .
                `)
            delay += 50
            basic.pause(delay)
            basic.showLeds(`
                . . # . .
                # . # # .
                # # # # #
                # . # # .
                . . # . .
                `)
            delay += 50
            basic.pause(delay)
            basic.showLeds(`
                . # # # .
                . . # . .
                # # # # #
                . # # # .
                . . # . .
                `)
            basic.pause(delay)
            delay += 50
            player1Turn = true
        }
    } else {
        basic.showString("Crash!")
        player1Turn = true
    }
})
basic.forever(() => {

})
delay = 0
spin = 0
player1Turn = true

This is an example of a board game in which the micro:bit displays an arrow pointing in a random direction. The paper legend indicates different actions the player must take.

Here is a portion of the board game’s code. A boolean variable is used to determine whose turn it is. If player1Turn is false, then it’s player 2’s turn. A random number is generated to show the arrow seventy-five percent of the time (for values of 0, 1, or 2).

let player1Turn = false;
input.onGesture(Gesture.Shake, () => {
    if (player1Turn == true && Math.randomRange(0, 4) < 3) {

    }
})

Reflection

Have students write a reflection of about 150–300 words, addressing the following points:

  • How did you incorporate boolean variables into your micro:bit program?
  • How did you incorporate boolean operators into your micro:bit program?
  • Describe something in your project that you are proud of.
  • If you had more time to work on this project, describe what you might add or change.

Assessment

Competency scores: 4, 3, 2, 1

Boolean

4 = More than 2 Boolean variables are implemented in a meaningful way.
3 = At least 2 Boolean variables are implemented in a meaningful way.
2 = At least 1 Boolean variable is implemented in a meaningful way.
1 = No Boolean variables are implemented.

micro:bit program

4 = micro:bit program:
* Uses Booleans in a way that is integral to the program.
* Compiles and runs as intended
* Meaningful comments in code
3 = micro:bit program lacks 1 of the required element.
2 = micro:bit program lacks 2 of the required elements.
1 = micro:bit program lacks all of the required elements.

Collaboration reflection

4 = Reflection piece addresses all prompts.
3 = Reflection piece lacks 1 of the required elements.
2 = Reflection piece lacks 2 of the required elements.
1 = Reflection piece lacks 3 of the required elements.