15. Case 14: Guess the tones

15.1. Introduction

Make a micro:bit device that is able to recognize the tones.


15.2. Quick to Start


Nezha expansion board × 1

micro:bit × 1

Connection Diagram

  • Connect the micro:bit to Nezha expansion board as the picture shows.


15.3. MakeCode Programming

Step 1

Program to show icon in the on start brick and set the variable K as 0.


In forever brick, set the variable j as true and the value of i as a random number among 1~7.


If i=1, programme to play the tone of C; if i=2, set to play the tone of D, and set the following 5 tones accordingly in the same way.


While the variable j is true, set k=k+1 after button A being pressed and display the value of K; while button B being pressed, if k=1, set to display √; if k≠i, set to display ×, and pause for 2000ms, then display the smile face; if k=0, set the variable of j as false.


Full Code: