Introduction: Big 6 Digits Seven Segment Digital Clock

Picture of Big 6 Digits Seven Segment Digital Clock

This is a my second Digital Clock project.Which is having 5.5" height 6 digits seven segments.

Working with PIC16F876A microcontroller 
Power : 12V DC / Ampere : 1.2A Max 
Time Display : Hours / Minutes / Seconds  

Length : 24 inch
Height :  7inch

I will add a fully completed clock picture with aluminium frame which I made. :-)


Step 1: Find a Parts for Schematic Diagram

Picture of Find a Parts for Schematic Diagram

Check the attached circuit diagram for part list.

Common anode 7Segments - 6Pcs
PIC16F876A - 1
ULN2803 for Segment outputs driver stage.

2SA1680 and 2SC2785 for Segment Common Anode outputs.

check the pin outs for 7 Segment and finished circuit board.

Step 2: Aluminium Frame & Segments Fixing

Picture of Aluminium Frame & Segments Fixing

Aluminum Frame made by Aluminium Box bars.

Step 3: Working Clock


Chite (author)2017-07-10

can i have the hex code please

Fajar Hutomo Ardiansyah (author)2016-12-03

Please.. give me for source code/file hex.. can you send ., my email :

TahsinA2 (author)2016-10-14

Please send me hex file and complete code


PrateekA19 (author)2016-09-15


pls send the completed code to

agus_naviyanto (author)2016-03-12

Plz send me hex file and complete code


chathurad1 (author)2016-03-04

plz send hex file

rasel01733 (author)2016-02-09

Would you please give me the complete code for 6 digit clock and circuit??

rana_jee773 (author)2015-11-21

pls provide me the .hex file

nodoubtman (author)2013-02-04

what is the use of uln2803 can't you light up each segment with simple resistor? what's the difference with uln2803?? thanks a bunch!

slwthr (author)nodoubtman2014-01-07

why not you can use each transistor with resistor to drive segments. But the PCB will be more complex.

amnamrza901 (author)2013-09-01

kindly send me hex file on kindly i loved this project i want to make it for once

sislam7 (author)2013-02-01

Please provide me the hex file .

detehadi (author)2012-09-30

hi plz mail me the he code i hav to try its nice thanks

Ashu1107 (author)2012-09-29

plz can i hv hex file and a code written in notepad for this digital clock
it will be great if i will provided the code for atmega16.


Email id:

hilomike (author)2012-08-27

Nice job! I'm interested in building your project to keep track of our triathlon times. How can I add tenths of a second to this?

alsatel06 (author)2012-05-20

plez code hex de set horloge

goranvladimirov (author)2012-05-12

superr clock for my home plz send me hex file and circuits diagram I m very thankful to u. my email address


smorad (author)2012-05-02

Hye.. currently i'm doing digital alarm clock with 5 time set. but it seem really complicated for the circuit. i need to use many decoder, latch and buffer. i dont know how to make it simple. before this i'm using Easy68k but now i want to try using PIC. can anyone help about the schematic first.. here is some document that can make u understand what i mean..

chiren1 (author)2012-03-23

where is the hex file

solangi01 (author)2012-03-13

I like this clock I make for my home plz send me hex file and complete and clear circuits diagram I m very thankful to u. my email address

slwthr (author)solangi012012-03-13

Here!!Check my other clock without Seconds!

boodah (author)2011-12-02

Do you have a modified setup for just hours and minutes without the seconds panels?

slwthr (author)boodah2012-03-13

Here!!Check my other clock without Seconds!

krish69 (author)2011-11-22

where is the hex file??

prash_thil (author)2011-09-21

nice one user:slwthr
but i recommend a clean desk atleast when taking the picture :P
scan the diagrams will ya :P

possible to read though!
i made it and worked fine! no faults at all

itsjustdoc (author)prash_thil2011-10-21

Bah! Clean desks! Who needs 'em?!

aasif.faiz (author)prash_thil2011-09-27

Haha PP Desilva , i'd cut one of my ears off if u actually made it :P, BTW Nice Instructable Harith

slwthr (author)prash_thil2011-09-21

hahah...I will make it as a sexy table as soon as possible :D

shifna iqbal (author)2011-09-20

waoo...dis s unblvbl haryy...awsm...keep it up boy...:)

prash_thil (author)shifna iqbal2011-09-21

haryy?? O.o

slwthr (author)prash_thil2011-09-21

any problem u gay!! :P

prash_thil (author)slwthr2011-09-27

mama thota kiyanne naha!!!
lol they've got a be nice policy!

aasif.faiz (author)prash_thil2011-09-27

Haha Harith u just found out u should see this guy at school runnin around huggin guys :P

slwthr (author)shifna iqbal2011-09-21

hey thanx a lot shif! :-)

About This Instructable




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