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.
![Big 7-segment Digital Clock]()
Step 1: Simple paper copy schematic
IC – PIC16F628 / PIC16F84A
Step 2: Collect your parts:
4x 6″ big 7 segment display
PIC16F84A
3x 10K Resistors
2x tack switches (micro switches)
4MHz Cristal (XTAL)
2x 22PF
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.
![Big 7-segment Digital Clock Schematic]()
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.
For more detail: Big 7-segment Digital Clock
Current Project / Post can also be found using:
- pic 16 controller biasing circuit clock
- pic16f628a digital clock
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