arduino 7 segment clock with rtc


Please visit my instructable page for the circuit diagram, so let’s get started. You will require these components. We are using an Arduino Uno for controlling the circuit and for 717 display or SSD wit, common anode, pins and three SPD pieces start off by cutting this pair wise. In the length of C Center fill up the coating of the spare wires and cut them in small pieces, bend them to form for small jumper wires, be careful. While doing so, you may get hurt. We will require this to solve the common anode themes of the displacing the plate. After you have finished, making layout lip read, good started turn to medium forward and keep a gap of minimum of five fingers between them. Inserting all the G wise is time to insert year systems inside the SSDs in such a way that the common pins of the displays are in the same book as set of jumper wires and repeat the same with the other. Displays now connect the zero pin of the first display from the left to another roll. You now repeat the same process with the other displays in such a manner that the european of the first display of the left, the right and the fourth display the BAM right. What is number one? The leveling up now, it’s time to copy one. Cue first insert the resistance, as if your resistance is time to connect the thickness of started by connecting the note pinch of, is this repeat the same process with the bottom and the top pins of the displays now extend the BFG.

The first display to the other rules now repeat the same process with the EDC. Dot means I have to load extra wires to the legs of the SPD. Switches for good connection now insert a switch to the upper row today. Small jumper wire connecting one of the legs of the ski with a rope you now in 30. Second key connecting one of this leg to the jumper wire, now insert another example where you, through this kanaka troll and to Vienna, No now insert the third key. Such a manner that one on the leg is connected with the second jumper wire now it’s time to connect our prototype to the Arduino start by connecting the jumper row to the ground, pin or password. The left leg of target goes to the k13. The left leg of the second team goes to the pa2 of the other, and the left leg of t1 goes to the Queen in auto fire. Now, it’s time for coming the segment’s to the Arden pin a goes to pin to Padrino in will go to print 3, pin see two three four pindy to pin five Big E 2p6. We have between 7 pin g 2p neg and the dot pin goes to be nice. Now connecting the energies windows go to, pin 13 entry goes to pin 12 into those who’ve been 11 and then one plus 15 and our circuit is complete. Now plug the Arduino to the computer and upload the code, get my project page for the source code and the circuitry is link, is given below and is absolutely free.

After the code is approved, you can see the displays coming to light along with the blinking dots. First key is voyageurs, while holding it praise the our key or the mini to change it. It’S easy to make and fun to play.


arduino 7 segment clock with rtc Video







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Originally posted 2017-01-02 12:08:45.

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Comment (49)

    1. Sorry Hammad for such an error. actually the Time library i have used was for old version of arduino ide. it was update after arduino ide 1.6.1 version, hence the error.

      here is the link to new updated library, but before you use it delete the Earlier Time folder from libraries folder
      C:\Users\lenovo\Documents\Arduino\libraries and also from
      C:\Program Files (x86)\Arduino\libraries

      now dowload the zip file and add it to arduino,

      To add it go to sketch->Include Library->Add .Zip Library and find the zip file.
      after that go to sketch->Include Library->Time

      And it will work.

  1. sir code not working, all segment lighted only point dot working. the bytes in upload in ur video is different when i upload ur code download. tnx

    1. Code is all right Rajib , it’s the Arduino ide that is messing up. Update it to the latest version to make it work.

    1. Are you placing the buttons on breadboard ..?
      Check the connection may be the button is not connected properly ..

  2. This is urgent!!! Please help me sir. I am making this clock for a school project that is due in 2 days. The spdt switches are not working. I have clearly followed your instructions. But I still can not set the time. There is no problem with the code. Please help me sir I dont know what to do.

    1. Sourish Pardhan,
      1. Have you checked the switches if they are working fine.?
      2. The connection of switches to the board are all okay? sometimes due to the loose connection, they might not get connected to the board.
      3. Are you using a breadboard? then the pins of SPDT are small and won’t reach the board connecting holes. Add extra thin wire as I have added to the switches.

    2. Dear Sir, I am using a breadboard and spdt switches are properly connected. I actually just realised that spdt switches are working fine. However the displays are not properly showing numbers when I am setting the time. Please help me with displays issue.

    3. Sir, the digits always look like an 8. Sometimes when I am pressing the switches, the digits look like a 3 or 6 only. I cannot see any other numbers on displays.

      Could this be due to an issue with the wires or resistors? Do resistors have positive and negative sides?

      Or is this an issue with the LED Displays?

    4. Most probably that because of connections issue. Try to remove all the displays and try to connect one and test . And add one by one and test.

  3. Just a little clarification…will this work if I power the Arduino with a power source, and not have it connected to a computer? Also, just give me a few tips on making it standalone, i.e., without the Arduino board. I guess just the Atmega 328P should do the job?

    1. @MadRajib Lab Thanks…ya I know about that. But was a bit unsure because the program has Serial.begin() function. That won’t need a serial monitor.. right?

  4. bro please solve the coding problem you have :
    Arduino: 1.8.8 (Windows 10), Board: “Arduino/Genuino Uno”

    C:\Users\NILANJAN (DJ NIL)\Downloads\final_clock_arduino_12hr\final_clock_arduino_12hr.ino: In function ‘void loop()’:

    final_clock_arduino_12hr:59:18: error: ‘hour’ was not declared in this scope

    int hr = hour();


    final_clock_arduino_12hr:60:47: error: ‘minute’ was not declared in this scope

    int timp = ( (hr>12)?(hr%12):hr)*100+minute();


    C:\Users\NILANJAN (DJ NIL)\Downloads\final_clock_arduino_12hr\final_clock_arduino_12hr.ino: In function ‘void set_time()’:

    final_clock_arduino_12hr:80:25: error: ‘minute’ was not declared in this scope

    byte minutes = minute();


    final_clock_arduino_12hr:81:21: error: ‘hour’ was not declared in this scope

    byte hours = hour();


    final_clock_arduino_12hr:131:35: error: ‘setTime’ was not declared in this scope



    exit status 1
    ‘hour’ was not declared in this scope

    This report would have more information with
    “Show verbose output during compilation”
    option enabled in File -> Preferences.
    ———————————————————————————–this is the error please solve it and also if processable use rtc to keep clock running when on power failure

  5. Good video bro.
    But I have a question,
    Sir, I am making an arduino digital clock, but I don’t want to keep the USB attached .If I use a 9v battery, where do I attach it?
    Or should I just attach the other side to a power bank??
    Please reply


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