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gpio_led_control

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gpio_led_control [2016/08/09 17:48] – walkeradmingpio_led_control [2017/10/22 15:40] (current) – walkeradmin
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-**Please be aware, the GPIO pins are 3.3v Logic, and are restricted to 16mA**+**Please be aware, the GPIO pins are 3.3v Logic, and are restricted to 16mA - exceeding 16 mA will damage your Pi**
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     #import modules     #import modules
     import RPi.GPIO as GPIO    # This imports the GPIO libarary that allows the use of the GPIO pins,     import RPi.GPIO as GPIO    # This imports the GPIO libarary that allows the use of the GPIO pins,
-    imporot time               # This imports the time libarary (for delays among other things)+    import time                # This imports the time libarary (for delays among other things)
                                # These libraries are built in to Raspbian.                                # These libraries are built in to Raspbian.
          
          
-    GPIO.setmode(GPIO.BOARD)   # This sets the GPIO pin numbering. Our LED is connected to Pin 12,+    GPIO.setmode (GPIO.BOARD)  # This sets the GPIO pin numbering. Our LED is connected to Pin 12,
                                # so we can reference it by using BOARD as pin 12. However there is                                # so we can reference it by using BOARD as pin 12. However there is
                                # another option (BCM) where we can reference a pin by it's name, pin                                # another option (BCM) where we can reference a pin by it's name, pin
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                                # read in a voltage (but only in terms of a 0 or a 1))                                # read in a voltage (but only in terms of a 0 or a 1))
          
-    GPIO.output(12, GPIO.LOW)  # sets the GPIO Pin 12 to low (so 0v)+    GPIO.output(12, 0)         # sets the GPIO Pin 12 to low (so 0v)
          
-    time.sleep(3)+    time.sleep(1)              # waits one second (settling time)
          
-    GPIO.output(12, GPIO.HIGH) # sets the GPIO Pin 12 to hight (so 3.3v)+    GPIO.output(12, 1)         # sets the GPIO Pin 12 to high (so 3.3v) LED will turn on
          
 +    time.sleep(3)              # waits 3 seconds, so LED will be on for 3 seconds
          
-    GPIO.cleanup()             # Resets all the GPIO pins to their default state+    GPIO.cleanup()             # Resets all the GPIO pins to their default state (LED will go off)
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 The LED should come on for 3 seconds, then go off. The program will then end. The LED should come on for 3 seconds, then go off. The program will then end.
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 +\\ 
 +You can see it in operation Here: {{:led_video.mp4|950x574|autoplay,loop}}
 +\\ 
 +**Remember:**
 +
 +Pins are 3.3v
 +\\ 
 +16mA MAX
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 +\\ 
 +This guide is comprised of information from a youtube video by **Gaven MacDonald**. Thanks Gaven.
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gpio_led_control.1470764901.txt.gz · Last modified: (external edit)