Diy Seven Segment Display Clock

in this tutorial, I am going to show you how to build a seven-segment clock

Step 1: COMPONENTS

• 4* common anode seven segment displays https://amzn.to/3aDfwtP
• Arduino UNO https://amzn.to/2VXJOlO
• 3 push buttons https://amzn.to/2KxexB8
• Ds1307 rtc module https://amzn.to/2zmkG0p
• Common PCB https://amzn.to/3cPaNXP
• 2*leds https://amzn.to/2VSgkWB

Step 2: Cicuit Diagram

As the name indicates seven segment displays has 7 segments. each segment is a single led and all the 7 LEDs connected together with a common pin that may be a common positive or a common negative and arranged in a specific style.

A typical 7 segment display has 10 pins arranged in top and bottom each of middle pins are common pins

And others are to control corresponding seven segments

Step 3: Setting the Displays

we have 4 displays that is totals of 4*8=32 pins to control this our Arduino doesn't have 32 pins so how to do this. yes, multiplexing...
so we connect all segments together that is segment A of 4 displays together, segment B of all displays together and soo on ... now we have 7 common segment pins and 4 common anode pins that is total 11 pins yes our Arduino has 11 pins .by using multiplexing lets control 4 displays with 11 pins instead of 32

Step 4: Connections

I connected everything according to the circuit

connect one end of 3 push buttons together and connect to A0, A1, A2

RTCmodule works on i2c communication so connect

SDA TO A4

SCL TO A5

GND TO GND

VCC TO 5V

Step 5: Testing on Breadboard

I connected everything according to the schematics and everything work perfectly

Step 6: CODE

DOWNLOAD

download upload

Step 7: REPLACING THE ARDUINO UNO WITH HOMEMADE ARDUINO

to save some space I removed the Arduino and repaced with my homemade Arduino

watch this video to know how I made my Arduino board

Step 8: Making the Case

i used 3mm foam sheet to build the case

Step 9: Happy Making

if you have any doubt about this project please comment below

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