USB INTERFACE FOR THE PC
The following circuit is an interface for the PC using a USB interface. The microcontroller is a PIC16C745 and all the details on how to program it is given on the website of Microchip. The circuit can accept 2 analog inputs and have diagnostics interpreted by the PC program. It can also measure 4 digital inputs, deliver 8 digital outputs and also deliver 2 DAC outputs. For more information check the data sheet of the PIC16C745 and the associated programs given by microchip.