LCDは指定されたピンに接続されており、Arduinoがこれらのピンを介してLCDにデータを送ります。 switchPinは、スイッチが接続されているピン番号6を表します。

This tutorial demonstrates how to control the backlight of a 16x2 LCD display using an Arduino Uno and a button. The provided script allows you to toggle the LCD backlight on and off with a button ...

[Kaushlesh Chandel] prototyped a few projects on his Arduino that use an HD44780 Character LCD. Wanting to keep these projects in one piece, but not sacrifice his Arduino board, so he etched his ow… ...