make a cricket score board with arduino mega 7 segment digits.

Other Hardware LEDs and Multiplexing
1

I am looking for info on how to build a cricket score board using arduino mega, 7 segment digits. I would like to have standard digital clock 4 7 segment, 3 digits for runs x 2 chase and current. 2 digits for wickets and overs. 3 digit for batsman x 2. What hardware and software will i need. your help would be great.

2

You don't need a Mega for that. What you need is shift registers that can sink current thru common anode 7-segment displays to turn the segments on.
I offer board that does just that, up to 12 digits, per board.
The board has a '328P on and is programmed the same as an Uno.

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Put the data you want to display in an array, and send the digits to the shift registers:

digitalWrite (ssPin, LOW);
for (x=0; x<12; x=x+1){
SPI.transfer(fontArray[digitsToDisplay[x]]); // fontArray will translate databits to segments
}
digitalWrite (ssPin, HIGH); // outputs update on this rising edge

The board will easily drive 12V segments (3 LEDs + resistor/segment, or 2 or 3 of those per segment for taller digits) for up to 150mA/segment.
For example, here are 8 digits in 2 different sizes being controlled by the board

3

How many digits in total? What size of digits? Do you need remote control?