RPi0_pwmBlink.py

# -*- coding: utf-8 -*-
# Python v 3.42
#
# This script will use pulse width modulation (PWM) to blink an LED
#
# Materials
#
# (1) Raspberry Pi Zero
# (1) OSEPP Red LED Module with integrated sensor
# (3) 22 AWG male/female wires
# (1) Adafruit RPi Pinout reference card
#
# Assembly
#
# RPi GPIO 5V  -> OSEPP +
# RPi GPIO GND -> OSEPP -
# RPi GPIO #18 -> OSEPP S
# ....or GPIO #12 or GPIO #13 or GPIO #19
#
# Engineering
#
# https://pypi.org/project/RPi.GPIO/
# https://docs.python.org/3/library/time.html

# ATS
# https://github.com/AnchorageBot

# Libraries
import RPi.GPIO as GPIO
import time

# global constants and variables
delay 0.01

# Setup
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(18, GPIO.OUT)
pwm = GPIO.PWM(18, 50)

# main
pwm.start(0)
try:
  while 1:
      for i in range(0, 100):
          pwm.ChangeDutyCycle(i)
          time.sleep(delay)
      for in in range(100, 0, -1):
          pwm.ChangeDutyCycle(i)
          time.sleep(delay)
except KeyboardInterrupt:
    pwm.stop()
    GPIO.cleanup()