Led Anode Cathode. Common Cathode and Common Anode RGB LEDs are two different kinds of RGB LEDs whose function is same but working is different. So for identification , led's comes with a unique way to identify its terminals as Anode or Cathode.
When you purchase an LED … longer leg is anode while shorter leg is. The cathode reaction can proceed only when it. Anode and cathode consist of a conducting catalyst support material (most often a The cathode and anode currents must be equal in a corrosion cell.
When you purchase an LED … longer leg is anode while shorter leg is.
How you can determine anode and cathode of LED?
To know the difference between anode and cathode, we first need to understand what they are. Neither the led anode or led cathode for that controller IC are connected to the supply rails. These LEDs come in Common Anode or Common Cathode circuits.