The modular design of the RC2014 means that every subsystem uses it’s own PCB.  Click the links below for a detailed breakdown of what each board does, how it works, schematics, and, where appropriate, examples and code

These modules are currently ‘live’ on Tindie if you want to buy them

Backplane Pro

Backplane 8 

Backplane 5

Compact Flash

Pageable ROM

64k RAM

Digital I/O

Digital Input

Digital Output

Pi Zero Serial Terminal

Prototype Module

Universal Micro Keyboard

2 Port Joystick Module

Some of my experimental, older, prototype or other modules can be found here