SunFounder ESP32 Starter Kit
• In a common cathode RGB LED, all three LEDs share a negative connection (cathode).
• In a common anode RGB LED, the three LEDs share a positive connection (anode).
Note: We use the common cathode one.
RGB LED Pins
An RGB LED has 4 pins: the longest one is GND; the others are Red, Green and Blue. Place the RGB LEDs as shown,
so that the longest lead is second from the left. Then the pin numbers of the RGB LEDs should be Red, GND, Green
and Blue.
You can also use the multimeter to select Diode Test mode, and then connect as shown below to measure the color of
714 Chapter 5. Learn about the Components in Your Kit