OSEPP FTDI Breakout Board (Arduino Compatible) Pinout compatible with Arduino boards such as OSEPP brand Form factor is breadboard friendly Selectable common-collector voltage (VCC) of 3.3 or 5 V The pinout is designed to work with Arduino and compatible boards that do not have a built-in USB-to-serial converter, such as the Pro and Pro Mini. The pin VCC can be easily configured to be 3.3 or 5 V by placement of a jumper.