The mind boggles.
Yes i am working the same project that in the website
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Even in 2007 that article was 20 years behind the times. And the code is all left justified and full of 
s
@Afnan
Do you have a reason to go this way? If you're into having a retro trip or just want to learn about 74-series chips that's OK, but if this is a serious project it's time to get real.
Yes when provide 12v to relay and 5v to other chips that in the circuit diagram
The fan doesn't work
Don't the chips need some control from the PC? Just sayin'
Rob