WalkerWiki - wiki.alanwalker.uk

User Tools

Site Tools

Trace:
gpio_led_control

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
Last revisionBoth sides next revision
gpio_led_control [2016/08/09 18:49] – walkeradmingpio_led_control [2017/10/22 16:40] – walkeradmin
Line 8: Line 8:
 \\  \\ 
 \\  \\ 
-**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**
 \\  \\ 
 \\  \\ 
Line 34: Line 34:
     #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,
-    import 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
Line 46: Line 46:
                                # 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)
 \\  \\ 
 \\  \\ 
Line 61: Line 62:
 \\  \\ 
 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.
 +\\ 
 +\\ 
 +You can see it in operation Here: {{:led_video.mp4|950x574|autoplay,loop}}
 +\\ 
 +**Remember:**
 +
 +Pins are 3.3v
 +\\ 
 +16mA MAX
 +\\ 
 +\\ 
 +This guide is comprised of information from a youtube video by **Gaven MacDonald**. Thanks Gaven.
 \\  \\ 
 \\  \\ 
  
gpio_led_control.txt · Last modified: 2023/03/09 22:35 by 127.0.0.1