Project 4: Programmable Buttons

Click to download the code 1 for this lesson

Click to download the code 2 for this lesson

(1)Project Description:

Buttons can be used to control circuits. In an integrated circuit with a button, the circuit is connected when pressing the button and it is open the other way around. Micro: Bit main board V2 boasts three buttons, two are programmable buttons(marked with A and B), and the one on the other side is a reset button. By pressing the two programmable buttons can input three different signals. We can press button A or B alone or press them together and the LED dot matrix shows A,B and AB respectively. Let’s get started.

(2)Components Needed:

Micro:bit main board V2

Micro USB cable

(3)Test Code 1 :

Link computer with micro:bit board by micro USB cable, and program in MakeCode editor,

Complete Code:

(4)Test Results 1 :

After uploading test code 1 to micro:bit main board V2 , the 5*5 LED dot matrix shows A if button A is pressed, B if button B pressed, and AB if button A and B pressed together.

(5) Test Code 2 :

Complete Program :

(6)Test Results 2:

After uploading test code 2 to micro:bit main board V2, when pressing the button A the LEDs turning red increase while when pressing the button B the LEDs turning red reduce.