The LED segments of the display require current-limiting resistors when powered from a 5 V logic pin. The value of the resistor is typically between 330 and 470 ohms. And, driver transistors are ...

Arduino code /* sketch 1 turn on a LED when the button is pressed turn it off when the button is not pressed (or released) */ int pinButton = 8; //the pin where we connect the button int LED = 2; ...