MINI USB INTERFACE BOARD. Use your PC to connect to the outside World! Aery Small, universal USB powered & controlled I/O board. Add USB interface to existing equipment. 15 inputs / outputs, including analogue inputs / digital inputs/outputs and PWM outputs. The number of inputs/outputs can be further expanded by connecting two cards to the PC"s USB connectors. All communication routines are contained in a Dynamic Link Library (DLL). You may write custom Windows Applications in Microsoft Visual Basic, Microsoft VC, Borland Delphi, Borland C++ Builder or most other 32-bit Windows application development tool that supports calls to a DLL.