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Built-in project · Raspberry Pi Zero 2 W

Blink an LED with RPi.GPIO on a Raspberry Pi Zero 2 W

RPi.GPIO on a Raspberry Pi Zero 2 W: an LED on GPIO17 blinks twice a second, and the Serial Monitor counts every four blinks. The whole build, a Raspberry Pi Zero 2 W and 2 more parts, runs here in your browser on the Python below; open it in the editor to change the wiring or the code and run it again.

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The parts retail for about $18.15. On Mokxi they're free.

Blink an LED with RPi.GPIO · Raspberry Pi Zero 2 Wlive0.000 s 0.00x
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The circuit itself, running here on the simulator. Press what can be pressed; click anything else to open it in the editor.

The code

The Python exactly as the editor opens it. Change a line there and press Run: the board runs main.py in a Python engine in the page, with gpiozero and RPi.GPIO, and nothing to compile.

main.py · Raspberry Pi Zero 2 W
# Blink an LED with RPi.GPIO on a Raspberry Pi Zero 2 W.
# The Zero's 40-pin header is a Pi 4's, pin for pin: the LED's long leg goes
# to GPIO17 (header pin 11) through a 330 ohm resistor, its short leg to
# ground (pin 9).
import RPi.GPIO as GPIO
import time

LED = 17
GPIO.setmode(GPIO.BCM)
GPIO.setup(LED, GPIO.OUT)

count = 0
try:
    while True:
        GPIO.output(LED, GPIO.HIGH)
        time.sleep(0.25)
        GPIO.output(LED, GPIO.LOW)
        time.sleep(0.25)
        count += 1
        if count % 4 == 0:
            print(count, "blinks")
except KeyboardInterrupt:
    GPIO.cleanup()

Parts list

4 parts, plus the jumper wires. They retail for about $18.15; on Mokxi they're free.

How it is wired

3 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 Zero 2 W pin GND; LED, green pin C
  • Raspberry Pi Zero 2 W pin GPIO17; Resistor, 330 Ω pin 1
  • Resistor, 330 Ω pin 2; LED, green pin A

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