VPL Infotech & Consultant offers USB Experimental Board. VPL Infotech & Consultant designs and manufactures merchandising device programmers, device testers, etc. This USB Experimental Board, VPL-8055 interface board has 5 digital input channels and 8 digital output channels. In addition, there are two analogue inputs and two analogue outputs with 8 bit resolution. The number of inputs/outputs can be further expanded by connecting more [up to a maximum of four] cards to the PC`s USB connectors. All communication routines are contained in a Dynamic Link Library [DLL] 8055D.DLL. One may write custom Windows [98SE, 2000, Me, XP] applications in Delphi, Visual Basic, C++ Builder or any other 32-bit Windows application development tool that supports calls to a DLL..