you can use common anode or common cathode display, just select the display type. Here is the pinout information:(I have attach the all diagrams of parts and 7 segments)
I'm used 4x 6" big 7 segment display's.
BUY CLOCK Completed DIY BOARD : http://www.ebay.com/itm/270939743809?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649#ht_1013wt_1265
Step 1: Simple paper copy schematic
IC - PIC16F628 / PIC16F84A
Step 2: Collect your parts:
3x 10K Resistors
2x tack switches (micro switches)
4MHz Cristal (XTAL)
If you are planing to protect your IC you should connect the IC through 5V regulator (1x 7805)
Vero baord(I used dot matrix board)
and other 7 Segment driver circuit parts displayed with attach image.
Step 3: Solder your all parts
Please do not solder your PIC16F84 on your board.Fix that through 18 pin IC base or Zif socket.
Step 4: Make your enclosure
and completed circuit board and 7segment board fix on your back plastic acrylic sheet.
and fix the Hour and Mins adjusting button to your enclosure right side panel.