Hi Robert, Small assembled circuit boards are available that connect to USB ports and provide digital and/or analog I/O.
I bought one to play with thru electrokits.com (USB Experiment Interface Board K8055) that comes with a well documented DLL to access it and demo software source in Delphi plus others. With the above info it was easy to write my Delphi app to read and write to the board even tho the demo did it all. FYI this board has 5 digital inputs, 8 digital outputs, 2 analog inputs, 2 analog outputs, and more. Amplification of the analog input is changeable. This board may not meet your needs but there must be others out there that will. If you want more info, let me know Regards Dick _______________________________________________ Delphi mailing list -> [email protected] http://www.elists.org/mailman/listinfo/delphi
