Raspberry PI 4 PWM example

gistfile1.txt

import RPi.GPIO as GPIO
from time import sleep

ledpin = 12                             # PWM pin connected to LED
GPIO.setwarnings(False)                 #disable warnings
GPIO.setmode(GPIO.BOARD)                #set pin numbering system
GPIO.setup(ledpin,GPIO.OUT)
pi_pwm = GPIO.PWM(ledpin,1000)          #create PWM instance with frequency
pi_pwm.start(0)                         #start PWM of required Duty Cycle

pi_pwm.ChangeDutyCycle(1)