Homemade Arduino (Arduiniq ver.3.0)
If you need to use Arduino shield on your projects must use an Arduino Uno or Arduino Mega boards or made your Arduino style development board.
This board use ATmega329P-PU microcontroller with Arduino bootloader, voltage regulator with LM7805 and FTDI connector for upload sketch using USB interface:
Using 3D addon to (Autodesk) Eagle PCB software we can see how looks our Arduino style board (using also MS Paint to write text and draw indications).
Alse, in this picture is presented mode to wire USB interface with DIY Arduino style board.