glowing pendulum block activity

Construct a pendulum that glows using acceleration.

Welcome! This activity will teach how to construct a pendulum that glows using acceleration. Let's get started!

Create a forever loop that will constantly display the appropriate brightness on the LED display.

basic.forever(() => {
    
})

Now let's measure the acceleration on the y axis and store that value in a variable. The acceleration(y) function will provide the value.

basic.forever(() => {
    let acceleration = input.acceleration(Dimension.Y);
});

Since the micro:bit will be swinging back and forth, the acceleration will only be positive half of the time. Thus, to always get a positive value, we want to take the absolute value of the acceleration.

let acceleration = 0;
basic.forever(() => {
    acceleration = input.acceleration(Dimension.Y);
    acceleration = Math.abs(acceleration)
});

The function acceleration(y) returns a number between 0 and 1024. We want to use this value for the brightness of the micro:bit, but the set brightness() only accepts a value between 0 and 256. Thus, we need to divide the acceleration by 4 to ensure we will be in the appropriate range.

basic.forever(() => {
    let acceleration = input.acceleration(Dimension.Y);
    acceleration = Math.abs(acceleration);
    acceleration = acceleration / 4;
});

Now let's use our acceleration value to set the brightness on the micro:bit.

basic.forever(() => {
    let acceleration = input.acceleration(Dimension.Y);
    acceleration = Math.abs(acceleration);
    acceleration = acceleration / 4;
    led.setBrightness(acceleration)
});

Let's show what the brightness of the micro:bit is by turning all the LEDs on!


basic.forever(() => {
    let acceleration = input.acceleration(Dimension.Y);
    acceleration = Math.abs(acceleration);
    acceleration = acceleration / 4;
    led.setBrightness(acceleration)
    basic.showLeds(`
        # # # # #
        # # # # #
        # # # # #
        # # # # #
        # # # # #
        `)
});

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Excellent, you're ready to continue with the challenges!

2.2 KiB Raw Blame History

glowing pendulum block activity

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2.2 KiB

Raw Blame History