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.
- 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
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