I've designed an Arduino compatible board that can be easily build with throught hole components. It uses an modyfied version of avr-cdc.
- Can run at 5V or 3,3V (selectable with a switch).
- jumper for driving it competely over USB.
- uses avr-cdc for USB to TTL (modified version that gives you autoreset).
- uses an attiny2313 (avr-cdc) and an atmega328p (optiboot).
- runs with 19200 baud.
It is currently work in progress, but i would like to get some constructive feedbacks from you :-)
You can find the current state of the project on my Blog:http://www.cmdrkeen.net/2012/09/11/building-the-keenduino-ghettoino-rev-2/
I'm happy to see some comments :-)