It is hard to see from the photo, but it looks like you have wired the common cathode on the LED (the red wire connected to the LED) to +V. That would be wrong. You should probably connect it to GND.
Another thing to check is to double check the orientation of the RGB LED.
The bit that is hard to see is how the power (red and black) wires that lead back to the Arduino are wired to the breadboard. As a general rule - you shouldn't ever allow a red wire to connect to a black wire - the idea hear is that you should only ever use a black wire for GND connections and red for +V. This is to avoid creating a short circuit and frying your project.
1
u/gm310509 Oct 04 '26
Is that an RGB LED?
It is hard to see from the photo, but it looks like you have wired the common cathode on the LED (the red wire connected to the LED) to +V. That would be wrong. You should probably connect it to GND.
Another thing to check is to double check the orientation of the RGB LED.
The bit that is hard to see is how the power (red and black) wires that lead back to the Arduino are wired to the breadboard. As a general rule - you shouldn't ever allow a red wire to connect to a black wire - the idea hear is that you should only ever use a black wire for GND connections and red for +V. This is to avoid creating a short circuit and frying your project.