> For the complete documentation index, see [llms.txt](https://learn.arduinosa.co.za/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://learn.arduinosa.co.za/sensor-kits/37-in-1-sensor-kit/smd-rgb.md).

# SMD RGB

![](/files/-MS2NAou6yMYrE50NBhL)

RGB-LED with an SMD housing and no series resistor. The PCB printing is incorrect, it shows the green and red connections switched. The LED has a common cathode (the ‘-‘ pin). A suitable resistor value would be 220 ohms.