Thumb wheel switch and seven segment set timer in arduino

Hai all,

I have some question how to program arduino with the thumb wheel switch and seven segment display. my application like a timer countdown so the thumb wheel switch will set the timer parameter and the 7 seven display will show the timer in count down. i have one switch to start the time and reset switch to reset back the timer. can anybody help me with this application.

Thanks

Saripdol