Dave Cheney has posted an Apple-1 Replica build project which utilizes the Arduino platform. The build covers all aspects of the Apple-1 and is small enough to actually be inserted into almost any case. The Mega6502 is basically a two chip Apple-1 computer improving in the same tradition of the great Steve Wozniak (@woz on twitter), reduction of the number of chips required for the computer.
For more information about the Mega6502, check out Dave Cheney’s blog at:
http://dave.cheney.net/2014/12/26/make-your-own-apple-1-replica