[Usmar A. Padow] put together an Arduino Uno, SD card, four line character LCD, and PS/2 keyboard. but he’s also included alternative options to go without an LCD screen by using a computer ...

The 16u2 is normally used as the Arduino Uno’s USB interface ... The well-known fractal is displayed in all its glory on a modern LCD monitor, driven by a microcontroller, emulating a computer ...

“Uno R4 WiFi includes an error-catching mechanism that detects run-time crashes and provides detailed explanations and hints about the code line causing the crash,” according to Arduino – Electronics ...