This is a complete kit with alle the parts to build this retroshield. It contains the following: The project adds an 1802-processor to an Arduino Mega 2560 and let you run all of the 1802-based software available from the 70s. Based on software and designs by Erturk Kocalar, this Arduino Mega 2560 shield adds a supplemental 1802 processor to play around with. There is a small prototyping area to the left side that you can use to a button, an extra blinking LED because you felt like adding one - the sky is the limit. This item is the PCB only. You can find almost all the components to build this computer in my webshop. This is the project page: https://github.com/tebl/RetroShield1802-PCB https://elecena.pl/product/27512692/retroshield-1802-compleet 2024-12-18 https://elecena.pl/product/27512692/retroshield-1802-compleet 2024-12-28