Microcontroller Based Data Acquisition Interface(DAI) tutorial

This tutorial is about to make a data acquisition.To make a DAI you need a hardware part which can measure analog data and sends the digital data to computer. A PC app shows the data.Before starting the tutorial take a look to the result. The figure below shows the hardware where i used pic18f4550 to communicate with PC via usb.Two pots are inserted to make analog values here i named these as voltage and speed.pic18f2550 collects the analog value and sends to PC where a PC app i already made to show the data. The red is for testing purpose,it toggles by a button pressed from the PC app.

pic18f4550 Data Acquisition interface with software

Now see the software where the voltage and speed are shown using label and progress bar. If  you regulate the pot voltage and speed will change according to pot voltage.Software is build using visual studio 2010 c++.

Data Acquisition software with pic18f4550 usb interface

POSSIBILITIES:
By grasping the tutorial you will grow enough ability to make computer based real time monitoring,alarm,home security,control of robot,design of control room and many more.
BEFORE  START:
I highly recommend you to take a look my another post  Pic18f2550 usb device, make your own device!
It will help you to make a usb connection between PC and pic18f4550.
(Remaining part of the tutorial will be updated soon)