1.8 KiB
Button A and button B
~avatar avatar
Buttons are great to build games!
~
This program will show the word ANTEATER on the LED
screen when you press button A.
input.onButtonPressed(Button.A, () => {
basic.showString("ANTEATER");
});
~hint
The showString block can show letters, numbers, and punctuation
on the micro:bit screen.
~
Now try to unscramble these blocks in the editor so that the micro:bit
shows BANANA when you press button B.
input.onButtonPressed(Button.B, () => {
basic.showString("BANANA");
});
~hint
You can find the letter B by clicking the letter A on the
onButtonPressed block.
~
Click Compile to move your program to the BBC micro:bit!
Your turn!
Can you combine these blocks so your program shows your real name
instead of ANTEATER when you press A, but your secret agent
name instead of BANANA when you press B?
Pins
You can also use the pins as buttons. (The pins are the holes in the
metal stripe at the bottom of the micro:bit board.) For example, hold
the GND button with one hand and touch the 0 pin (called
P0) with your other hand to tell the micro:bit you're pressing it.
Unscramble the blocks in the editor to show a heart when you touch
pin P0.
input.onPinPressed(TouchPin.P0, () => {
basic.showLeds(`
. # . # .
# . # . #
# . . . #
. # . # .
. . # . .`);
});
Click Compile to move your program to the BBC micro:bit!
~hint
Try this experiment: find a friend and hold hands. Touch the GND
pin while your friend presses the P0 pin. You should see the
heart! The electric current is going through your bodies and across
your handshake to make it happen!