Published September 29, 2017 © CC BY

Calliope Noise Sensor

Use the calliope mini to detect a noisy environment. Use the buttons to change the noise level above which calliope mini shows a sad face.

BeginnerShowcase (no instructions)30 minutes2,842

Things used in this project

Hardware components

Calliope mini

Story

Introduction

This is a simple program to detect noisy environments and to provide feedback via the calliope mini.

Calliope Mini starts up and initializes the noise level / threshold to the current mic value. You then can use the Buttons A to decrease the level (which means you need to be quieter) or Button B to increase the threshold. In the forever loop, we check against the threshold and show a sad face for some time in case the threshold was surpassed (which means it was noisier).

Probably a great feedback tool during "quiet time" at school.

A video can be seen here.

Extra Ideas:

Calculate seconds it is noisy vs. not noisy. Turn it into a performance/noise indicator by calculating a noise KPI (noisy time divided by total time). Try to beat it next class.

Which class is the noisiest, which one is the quietest.

Which areas of your classroom/school are noisier and which ones are quieter over the duration of typical a day?

Schematics

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Code

Noise Sensor

let level = 0
let mic = 0
input.onButtonPressed(Button.A, () => {
    level += -5
})
input.onButtonPressed(Button.B, () => {
    level += 5
})
basic.forever(() => {
    mic = pins.analogReadPin(AnalogPin.MIC)
    serial.writeNumber(mic)
    serial.writeLine("")
    if (mic > level) {
        basic.setLedColor(Colors.Red)
        basic.showIcon(IconNames.Sad)
        basic.pause(500)
        basic.clearScreen()
    } else {
        basic.setLedColor(Colors.Green)
    }
})
level = pins.analogReadPin(AnalogPin.MIC)
basic.showNumber(level)

Credits

Sven Haiges

4 projects • 17 followers

Calliope Noise Sensor

Things used in this project

Hardware components

Story

Introduction

Extra Ideas:

Schematics

Full program

Code

Noise Sensor

Credits

Sven Haiges

Comments

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Calliope Noise Sensor

Calliope Noise Sensor

Things used in this project

Hardware components

Story

Introduction

Extra Ideas:

Schematics

Full program

Code

Noise Sensor

Credits

Sven Haiges

Comments

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