Étape 1 : Fais-le
Qu'est-ce que c'est ?
Code your own electronic metronome that makes regular beats which you can slow down and speed up as you practice music.
Introduction
Guide de codage
Ce que vous apprendrez
- How to adjust the tempo of musical notes played by the micro:bit
- How to use input buttons and audio outputs to make a useful electronic device
Comment ça marche
- At the start of the program, it sets the tempo to 100 bpm - beats per minute. This is a standard way of measuring the tempo, or speed, of music.
- A forever loop keeps the micro:bit playing a short note and then resting for one beat.
- Vous pouvez entendre le son en connectant un casque à la broche 0 et GND ou sur le haut-parleur intégré du nouveau micro:bit.
- Appuyez sur le bouton A pour ralentir le tempo de 5 bpm.
- Appuyez sur le bouton B pour l'accélérer de 5 bpm.
- Pressing button A and B together shows the current tempo on the LED display output.
Ce dont vous aurez besoin
- Un micro:bit
- MakeCode ou éditeur Python
- un boîtier de piles (optionnel)
Étape 2 : Programme-le
Étape 3 : Améliore-le
- You may notice that it plays its rhythm slightly slower than an electronic instrument with the same BPM setting - this is because each loop takes one and one sixteenth of a beat, instead of just one beat.
- You could try and make it more accurate by adding up fractions of a beat to make one whole beat: 1/2 + 1/4 + 1/8 + 1/16 makes 15/16 to add on the 1/16th of a beat that you’re playing the tone for.
- 'Forever' blocks also add a bit of a delay, so using a ‘while true’ loop inside it will speed up your code and make it more accurate.
- The code video at the top of this page shows you how to do this.
