[Damian Peckett] has implemented an Apple ][, its 6502 processor, and a cassette port, all on an Arduino Uno. If that wasn’t enough, he also uses a PS/2 keyboard for input and outputs analog VGA.

You won't need to wire up anything yet as the sketch uses the on-board LED ... you to browse through projects that only use an Arduino UNO. Another great resource for finding Arduino projects ...

Apart from understanding the Arduino's code language ... It's similar to the iconic Uno in a lot of ways. For instance, it's based on the same microcontroller, uses almost identical pinout ...

The Arduino can be a bit of a gateway board. You start with an Uno, then a shield, then another. Before you know it, you have an entire collection of shields. This is the problem 1Sheeld wants to ...