CircuitPython button on a Pico
CircuitPython on a Raspberry Pi Pico: a button on GP14 with the pin’s pull-up lights the board’s LED while it is held and counts each press. The whole build, a Raspberry Pi Pico and 1 more part, runs here in your browser on the firmware below; open it in the editor to change the wiring or the code and run it again.
Teaching? Assign it to your class in one click.
Beginner Runs in your browser. Free, and no account needed.
The parts retail for about $4.10. On Mokxi they're free.
The code
The MicroPython code exactly as the editor opens it. Change a line there and press Run: the board runs it on the official MicroPython firmware, with nothing to compile.
# CircuitPython on a Raspberry Pi Pico: a button lights the LED.
# The button joins GP14 to ground. The pin's own pull-up holds it True, so
# a press reads False.
import board
import digitalio
import time
led = digitalio.DigitalInOut(board.LED)
led.direction = digitalio.Direction.OUTPUT
button = digitalio.DigitalInOut(board.GP14)
button.switch_to_input(pull=digitalio.Pull.UP)
print("Press the button")
presses = 0
was_pressed = False
while True:
pressed = not button.value
led.value = pressed
if pressed and not was_pressed:
presses += 1
print("pressed", presses)
was_pressed = pressed
time.sleep(0.01)
Parts list
2 parts, plus the jumper wires. They retail for about $4.10; on Mokxi they're free.
- 1 × Raspberry Pi Pico
- 1 × Pushbutton
How it is wired
2 connections, pin by pin, read from the circuit itself. Each line is one set of pins joined together, by a jumper wire or a breadboard strip.
- Ground: Raspberry Pi Pico pin GND; Pushbutton pin 2b
- Raspberry Pi Pico pin GP14; Pushbutton pin 1a
Change it and keep it
Open it in the editor, change the circuit or the code, and keep your version in a free account.