Arduino - AT24C32 / DS1307 Real Time Clock 7 SEGment Display


Introduction: Arduino - AT24C32 / DS1307 Real Time Clock 7 SEGment Display

About: Hello world! I make simple & Advanced projects for people who want to learn programming and electronics. Most of my Instructables are about arduino and the wide range of sensors you can use with it. I ma...

Hello world! Today i made a real time clock on a 4 digit display. The display i used is not really for clocks but it works, only the 2 dots are not in the right place, but you do not have to change anything in the code. You need a Library for this project. Follow the next step for the Schematic, Code & Parts list.

You need the following library SevSeg.h

check if you are using a common anode or cathode display

You can change this in the code at line 26

int displayType = COMMON_CATHODE; //change that to COMMON_ANODE

Other instructions on how to set time are in the code!

Step 1: Schematic, Code & Parts List.

Wire everything like the schematic and upload the code! Make sure the library is installed.

Parts list:

  • Arduino uno
  • AT24C32 / DS1307 real time clock ( I used the one on the picture above. There is also room for a temperature sensor like the LM35 on it)
  • 4 Digit 7 Segment Display
  • 4x 1 k Resistors. (Optional)
  • Jumper wires set MM/FM/MF

Good luck!

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    10 Discussions

    display7seg.Begin(displayType, numberOfDigits, digit1, digit2, digit3, digit4, segA, segB, segC, segD, segE, segF, segG, segDP);
    Line to fix it

    2 replies

    hi vandenbrande. i've got the same problem. any suggestions?

    I got the following error messages while compiling

    Class SerSeg has no member named 'Begin', 'SetBrightness', 'DisplayString'

    Any comment, thanks

    i got error like

    exit status 1

    no matching function for call to 'SevSeg::begin(int&, int&, int&, int&, int&, int&, int&, int&, int&, int&, int&, int&, int&, int&)'

    2 replies

    yeah ,I have include the correct library i,e #include <SevSeg.h> but same thing happens

    What's the time format 12hrs or 24hrs

    nice brother