Step 1: Make it
What is it?
Measure how noisy it is around you using the new micro:bit's microphone sensor and a simple bar chart display.
What you'll learn
- How to use the new micro:bit's built-in microphone input sensor to measure how loud sounds are around you
- How to display numerical data from input sensors graphically on the LED display output
How it works
- The new micro:bit's microphone measures sound levels in numbers between 0 and 255. 0 is the quietest and 255 is the loudest sound measurement it can make.
- The code uses a forever loop to keep the microphone measuring sound levels and plotting a bar graph on the LED display.
- The louder the sounds measured, the higher the bar graph gets.
What you need
- new micro:bit with sound (or MakeCode simulator)
- MakeCode or Python editor
- battery pack (optional)
Step 2: Code it
Step 3: Improve it
- Create your own ways of displaying how loud a sound is, for example showing different emojis depending on how loud it is
- Make a visual noise alarm that only flashes when the sound goes over a certain level - you could use this to help keep your classroom peaceful
This content is published under a Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) licence.