DIGITAL CLOCK:

The components mainly used are:

IC7490, -- MOD-2 MOD-5 counter IC.

4511N, --- BCD to Sevensegment Decoder

HD-H103 -- SevenSegment Display

CD4060 -- Ripple Carry Binary Counter

CD4027B -- CMOS Dual J-K Master-Slave FlipFlop

BC548 -- NPN Transistor

Relay

LED :5mm RED,GREEN

Links for datasheets:

IC7490:

www.alldatasheet.com/view.jsp?Searchword=7490

IC4511N:

http://www.alldatasheet.com/datasheet-pdf/pdf/15630/PHILIPS/74HC4511N.html

HD-H103:

http://parts.digikey.com/1/parts/679648-led-7-seg-14-2mm-cc-red-rhd-hdsp-h103.html

CD4060BC:

http://www.alldatasheet.com/datasheet-pdf/pdf/26880/TI/CD4060.html

CD4027:

http://www.alldatasheet.com/datasheet-pdf/pdf/26863/TI/CD4027.html