Arduino UNO LED half brightness when connected to digital GND but not analog

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I am using an Arduino UNO. When lighting an LED with the switch button on a joystick module, I have two situations:



  • If the LED's cathode is connected to GND on the digital pin side of the Uno, the LED only dimly lights up on button press.

  • If the LED's cathode is connected to GND on the analog pin side of the Uno, the LED fully lights up on button press.

The device is receiving power from my laptop, and I am writing a digital HIGH/LOW to the LED pin (on press/release).



Is this a fault in my board, or is there a (perhaps more enlightening) reason why this is happening?






arduino-uno led digital







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    I am using an Arduino UNO. When lighting an LED with the switch button on a joystick module, I have two situations:



    • If the LED's cathode is connected to GND on the digital pin side of the Uno, the LED only dimly lights up on button press.

    • If the LED's cathode is connected to GND on the analog pin side of the Uno, the LED fully lights up on button press.

    The device is receiving power from my laptop, and I am writing a digital HIGH/LOW to the LED pin (on press/release).



    Is this a fault in my board, or is there a (perhaps more enlightening) reason why this is happening?






    arduino-uno led digital







    share|improve this question







    New contributor




    Wharf Rat is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      up vote
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      down vote

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      up vote
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      down vote

      favorite











      I am using an Arduino UNO. When lighting an LED with the switch button on a joystick module, I have two situations:



      • If the LED's cathode is connected to GND on the digital pin side of the Uno, the LED only dimly lights up on button press.

      • If the LED's cathode is connected to GND on the analog pin side of the Uno, the LED fully lights up on button press.

      The device is receiving power from my laptop, and I am writing a digital HIGH/LOW to the LED pin (on press/release).



      Is this a fault in my board, or is there a (perhaps more enlightening) reason why this is happening?






      arduino-uno led digital







      share|improve this question







      New contributor




      Wharf Rat is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      I am using an Arduino UNO. When lighting an LED with the switch button on a joystick module, I have two situations:



      • If the LED's cathode is connected to GND on the digital pin side of the Uno, the LED only dimly lights up on button press.

      • If the LED's cathode is connected to GND on the analog pin side of the Uno, the LED fully lights up on button press.

      The device is receiving power from my laptop, and I am writing a digital HIGH/LOW to the LED pin (on press/release).



      Is this a fault in my board, or is there a (perhaps more enlightening) reason why this is happening?






      arduino-uno led digital




      arduino-uno led digital






      share|improve this question







      New contributor




      Wharf Rat is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question







      New contributor




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      asked 3 hours ago









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      263




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          Despite double checking my cables before asking this question, it seems I had connected the LED's cathode to digital pin 13, and not GND. The issue is now resolved. Takeaway: Triple check your cables :)






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            Despite double checking my cables before asking this question, it seems I had connected the LED's cathode to digital pin 13, and not GND. The issue is now resolved. Takeaway: Triple check your cables :)






            share|improve this answer








            New contributor




            Wharf Rat is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
            Check out our Code of Conduct.





















              up vote
              2
              down vote













              Despite double checking my cables before asking this question, it seems I had connected the LED's cathode to digital pin 13, and not GND. The issue is now resolved. Takeaway: Triple check your cables :)






              share|improve this answer








              New contributor




              Wharf Rat is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
              Check out our Code of Conduct.



















                up vote
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                down vote










                up vote
                2
                down vote









                Despite double checking my cables before asking this question, it seems I had connected the LED's cathode to digital pin 13, and not GND. The issue is now resolved. Takeaway: Triple check your cables :)






                share|improve this answer








                New contributor




                Wharf Rat is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                Check out our Code of Conduct.









                Despite double checking my cables before asking this question, it seems I had connected the LED's cathode to digital pin 13, and not GND. The issue is now resolved. Takeaway: Triple check your cables :)







                share|improve this answer








                New contributor




                Wharf Rat is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                Check out our Code of Conduct.









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                answered 3 hours ago









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