Read more: Battery Brands Ranked From Worst To Best The Arduino Uno Rev3 is the third revision ... On the Rev3, the chip sits in a Dual In-line Package (DIP) socket, making it readily replaceable.

[Sandeep_UNO] may have the project for you. As you can see in the video below (and, yes, it should have the phone rotated and it doesn’t), his Arduino uses a servo motor to dip a bubble wand ...

[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.