Experimenters version ready

I promised some time ago that I would produce an experimenters version of the version 6 prototype. I have recently got a batch of these boards and done some tinkering. The pads are the same as the version 6 prototype so this is easy to make using the same solder stencil. The main difference is the line of headers along the right. These headers expose various pins from the microcontroller for additional IO options. Below is a diagram of the pcb and schematic.

If you want one of these instead of a normal version 6 prototype please contact me. I will make you up a custom version and share the code.