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!

Check out our website! http://www.arduinosensors.nl

<p>What's the time format 12hrs or 24hrs</p>
<p>nice brother </p>
<p>Follow me for more!</p>

About This Instructable




Bio: 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 ... More »
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