SunFounder ESP32 Starter Kit
LEDs are very common electronic devices that can be used to decorate your room during the festival, and you can also
use them as indicators for various things, such as whether the power to your home appliances is on or off. They come
in dozens of different shapes and sizes, and the most common are LEDs with through hole LEDs, which generally have
long leads and can be plugged into a breadboard.
The full name of LED is light-emitting diode, so it has the characteristics of a diode, where current flows in one
direction, from the anode (positive) to the cathode (negative).
Here are the electrical symbols for LEDs.
Various sizes and colors
708 Chapter 5. Learn about the Components in Your Kit
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