But what if the Arduino Uno was released in 1980 ... Secondly, it’s simpler: No USB-UART (which also means no USB programming), a different pin layout (Arduino shields likely won’t fit ...

The 16u2 is normally used as the Arduino Uno’s USB interface ... loading a Mandelbrot set program from cassette -or in this case an audio file stored on his cell phone, and running it.

The classic UNO is the ideal choice for beginners ... For your Arduino to work as you intended, you'd need to program it, and that's where the Arduino Integrated Development Environment (IDE ...