There's a company called Briel Computers that sells replicas of the Apple I, Altair 8800 and more. The Maker Shed sells a 4-bit microcomputer trainer from Japa

There's a company called Briel Computers that sells replicas of the Apple I, Altair 8800 and more. The Maker Shed sells a 4-bit microcomputer trainer from Japan. It has a hexadecimal keypad, 1 7-segment LED display, some other lights and a speaker. You could also go to eBay or a swap meet and buy an old microcomputer. http://www.brielcomputers.com/ http://www.brielcomputers.com/ http://www.makershed.com/ProductDetails.asp?ProductCode=MKGK21 http://www.makershed.com/ProductDetails.asp?ProductCode=MKGK...