4 Channels L6470
USB interface (micro USB)
8 MHz oscillator for L6470 and PIC microcontroller (PIC24FJ64GB002)
Header for external SPI interface if using Arduino or different microcontroller board.
Headers for step and direction interface, for microcontroller or parallel port PC interface.
I haven’t worked on this since October 2, 2013 (and it’s now January 21, 2014) so I’m uploading the Eagle  design files for you to use as you see fit. If you actually build this board I would love to see how it comes out!
NOTE: I have NOT tested this board design but I believe it works. I am a professional but that doesn’t mean my work is flawless.