Adding serial USB to arduino

Interesting video on adding USB directly to the Amtel controller.  Which is great it you are just using the chip.  The other nice thing is it can be done as a HID based device (think keyboard).

http://hackaday.com/2013/10/23/serial-usb-for-any-avr-microcontroller/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+hackaday%2FLgoM+%28Hack+a+Day%29

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