This USB Transformer is a USB-Serial adapter, using the CH340 IC. It converts a USB connection into a 5 or 3.3 volt Serial TX and RX that you can connect straight to the Arduino Mini, Arduino Ethernet or other microcontrollers such as the Larduino, allowing them to talk to the computer.In Arduino world, just like the Serial adaptor , this module can be also used for program uploading, it support Arduino Mini, Arduino Pro, Arduino Ethernet, LilyPad, LilyPad Simple, Fio, Larduino Mini or others. Support DTR signal automatic reset and upload.

With the onboard voltage selector (5V or 3V3), this USB Transformer can be suit for most of the microcontroller, and a heat shrinkable tube to ensure this module works stable, A 6-pins jump wire is also provided to help users use this module more convenient in any projects.