Free Libre Open-Source/-Hardware JTAG/UART Adapter based on the FT2232H chip.

The hardware is licensed under Creative Commons Share Alike By Attribution 3.0 (CC-BY-SA 3.0)

Copyright 2009-2010 Piotr Esden-Tempski

UART connector adapter side:

Pin No.	Name
1	+3.3V
2	TXD
3	RXD
4	GND

The numbering of the connector is from left to right when looking from the edge of the board at the pins of the header.

Hardware design file notes:

All designs up until version 1.0 of Floss-JTAG were designed in Cadsoft EAGLE. To view the files you will need to install EAGLE. Most of the designs are 4-layer; this means that you will need a paid version of the software to edit the inner layers of the board.