When I started this project I first made several prototypes to test all the features of the LPC1756. The first prototype was to make sure I could power up the LPC1756 and connect using JTAG and SWD.

After the first basic prototype I made a small dev board that breaks out all the pins. (I had a issue where I forgot the pull up on the USB D+ line and the IO pads could be pulled from the dev board quite easily)

The third prototype fixed the USB issue and added via's to all the IO pads