I try to make a LED light up with the code
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BOARD)
GPIO.setup(16, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
GPIO.setup(18, GPIO.OUT)
while (var==1):
GPIO.output(18,GPIO.LOW)
GPIO.cleanup()
as illustrated in the figure, the pin 18 serves to light up a LED or switch it Down but when I try with sudo python3 this script I see that the LED is lighten just a bit. Only if I connect my transistor base to the ground, I see that the LED is off completely I conclude that pin 18 is between HIGH and LOW, ont completely LOW... why?