Using only 2 capacitors, 3 resistors, 4 BIG seven-segment Display, 1 xtal, 2 switches ,and 1 Microcontroller PIC, you can build this Digital Led Clock main circuit.
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.
Ok now everyone who need this kit buy over here:
Step 1: Simple Paper Copy Schematic
here is the schematic and part list for the project.
IC - PIC16F628 / PIC16F84A
Step 2: Collect Your Parts:
4x 6" big 7 segment display
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
Solder your all parts on to your vero board matching with this Circuit diagram.
Please do not solder your PIC16F84 on your board.Fix that through 18 pin IC base or Zif socket.
Step 4: Make Your Enclosure
Make a enclosure box for clock.(makes with plastic acrylic sheet + glue)
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.
Step 5: Programe Your PIC16F84
I have attach the HEX (16F84 clock) file for this clock.You have to burn it into your chip well.