RobotDyn - CP2104 USB-TTL UART Serial adapter-microcontroller, 5V/3.3V (USB-A)
[Product Information]
This USB to UART Bridge is a module, base on Silicon Labs CP2104 UART bridge, and it is a good solution for connecting micro-controllers and other digital serial devices to PC
This board uses 5V signal levels by default. For use 3.3V level, pls cut off the bridge for 5V of soldering pads on bottom side of board, and make soldering the pads for 3.3V
For get detail information of IC CP2104 USB-UART bridge, pls folow this link: http://www.silabs.com/products/interface/usb-bridges