Latest revision: FemtoduinoUSB r14.2
See the FemtoduinoUSB_r14 folder. It is a 4-layer EAGLE PCB design + schematic.
FemtoduinoUSB ATMEGA328P-MU Arduino Clone. Originally based on the Femtoduino by Fabio Varesano. Modified by Alex Albino to include FTDI USB to serial integration.
The femtoduino, and femtoduinoUSB is released under the following license:
CC-BY-SA 3.0 Unported http://creativecommons.org/licenses/by-sa/3.0/
The USB to UART circuit was completed in part thanks to Jim Paris' super-awesome MicroFTX schematics (http://jim.sh/ftx/), which are released under the following license:
Creative Commons Attribution-ShareAlike 3.0 Unported License http://creativecommons.org/licenses/by-sa/3.0/ The pins on the latest revision are corrected to align perfectly with the original Femtoduino pin positions.