LEDs don't light up with Uno circuit 11

Hello, the arduino uno circuit 11 is not working and I rechecked it multiple times. The LEDs are not lighting up at all.

Hi @tombari. It will not be possible for us to help you with that problem based on such a vague description. Please provide a detailed explanation of what you mean by this, including:

  • What did you do?
  • What were the results you expected from doing that thing?
  • What were the results you observed that did not match your expectations?

Make sure to include the full and exact text of any error or warning messages you might have encountered.

Please also make sure you clearly explain what you mean by "arduino uno circuit 11". If you are following a tutorial you found somewhere on the Internet then post a link to the tutorial.

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Make a picture, post your code.

I have thousands of circuit diagrams and I have no clue as to which one is 11. Please post the diagram. Be sure to show all power sources on your diagram and all connections as well as links to each of the hardware's technical information.

Your LED polarity is backwards.

From the project:

The wire to GND ist connected from LED to LED.
Symbolically, each LED is connected in this simple way directly to the pin via a resistor:

The LED is connected backward, the longer leg is the anode (positive).

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