🔗 Overview 4 push buttons wired to digital pins with internal pull-up. 4 LEDs wired to digital pins with resistors. When you press a button, its corresponding LED lights up.

Arduino Uno board 3 × LEDs (Red, Green, Blue) 3 × 220Ω resistors 3 × Push buttons Breadboard Jumper wires USB cable for programming the Arduino Circuit Connections Each push button and LED is ...

(Google Translate) The wiring for this project is about as easy as you’d expect: the buttons connect to the digital inputs on the Arduino, and the LEDs on the digital outputs.