Some things only live on the diagram, like a timer or a connection to an Arduino. But some things live on both like switches, LEDs, graphs, and so on. You can connect all the little boxes together ...

For this experiment it is necessary to download and install the “Arduino I2C LCD” library. First of all, rename the existing “LiquidCrystal” library folder in your Arduino libraries folder as a backup ...

The chips on the Arduino Uno cost around $4 USD and can be removed with a IC puller, then you can connect the Arduino’s RX/TX to the IC’s TX/RX, and then connect the reset pins as RST->RST ...