AVR ZX Spectrum V2_0 support-pack, revision2:
https://dl.dropboxusercontent.com/u/12408899/V2_0%20Support%20revision%202.zipinside:
- soft for all controllers, some models ZX Spectrum;
- PCB project in PCAD2006;
- game-test-demo pack for device working control;
- circuit diagram, assembly rrawing, user manual (but in russian, with pictures);
- photos of assembled board, process of in-keyboard building.