Roomba Serial Interface
The Roomba SCI is a serial interface protocol to let you control your Roomba, but the port on the Roomba doesn't conform to RS232 standards. This board does the conversion.

There are two boards shown here. The first version (larger, encased in lexan), and the second version (smaller, encased in a blue floss box)

For more details, including software, see my blog post.
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