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Because I have not tested all electronic circuits mentioned on this pages, I cannot attest to their accuracy; therefore, I do not provide a warranty of any kind and cannot be held responsible in any manner.
USB to Serial with ATUSB
2. June 2009 - 20:49 — admin
Build your own Benito - an USB to Serial device based on AT90USB162.
The Benito board is a simple USB device with AVRUSB microcontroller AT90USB. Plus improving the TQFP-soldering skills as a bonus. :)
Author says: "This board was designed to allow people with intermediate soldering skills to build their own AT90USB162 based devices. The processor itself is a tqfp and the remaining components are almost exclusively smd 806 parts. While it is not as easy as working with dip components, it is not too difficult to do by hand and the processor is worth it."
Build your own USB to Serial device