This PCB has 16 RGB LEDs arranged in a matrix. Each LED has three anodes (red, green, blue) and one cathode. All current-limiting resistors are included on the board.
Pinout
![](https://i0.wp.com/doctor-pasquale.com/wp-content/uploads/2022/12/4x4-rgb-led-pinout.png?resize=205%2C300&ssl=1)
Hardware
This PCB uses common-cathode RGB LEDs and 220 ohm current-limiting resistors.
Schematic
Click for a larger version.
![](https://i0.wp.com/doctor-pasquale.com/wp-content/uploads/2022/12/4x4-rgb-led-schematic.png?resize=650%2C372&ssl=1)