In this lesson, we learn how to use LEDs and push buttons in these 10 LED projects. The wiring diagram is shown; the code is fully explained and demonstrated with multiple changes of settings for each project. We read the potentiometer's voltage and display the voltage by turning each LED on to represent the voltage. A simple traffic light project.

This code is part of a video lecture. This is project 4 code. This code will turn the LED on or off with a fading value. So the LED will get brighter slowly and will turn off slowly, fading out.