I'm interested in building circuits that can be controlled by the computer and also can give inputs to the computer. please tell me the required hardware, and software and source code in order to program the computer.the ciruit should be able to run in the background.my computer has 2 vacant COM ports, 3 vacant USB ports and 1, 25 pin vacant port and 1, vacant 15 pin port.
Thanx
Thanx
