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Get up!

初學者 | MakeCode, Python | LED 螢幕, 光感應器, 聲音 | 感應器, 數字和位置值, 迭代, 選擇



Turn your micro:bit into a light-sensitive alarm to help you get up in the morning. You'll learn how to use infinite loops, and selection with comparison logic.



  • The program uses the micro:bit’s LED display as a light sensor.
  • Selection ('if... else') and comparison logic (> 70) are used so that if the light level is above a certain amount, a sun icon appears and it makes a noise; else, it clears the screen.
  • If the light level is greater than (>) 70, a sun appears on the LED display, telling you it’s time to get up.
  • The program uses an infinite loop to keep sensing the light level.
  • You can adjust the threshold at which the sun appears. Use larger numbers to make it less sensitive to light, so the alarm only goes off when it's brighter - or smaller numbers to make it more sensitive to light.


  • micro:bit (or use the simulator in the online editors)
  • MakeCode 或, Python 編輯器
  • battery pack (optional but recommended)



  • Change the alarm sound.
  • Replace the sun icon with motivational messages that can help you to start your day.