Homemade Easy Digital Clock with RTC | 12Hr/24Hr

For code and schematic please click in the link below

Materials used :-

4 digit 7 segment display
Atmega328p chip
16Mhz crystal
2 x 22pf capacitor
10K resistor
100 Ohm resistor
2 x Push button
5 pin Female header
100uf capacitor
7805 regulator
DS3231/DS1307 RTC

[gartmorn]

A suggestion would be a switch between the setting buttons and ground so that it cannot be reset accidentally. A slide switch would be ideal.

[kucheriya]

How little did I learn in engineering college.... Not a clue what was done here or how any electronics work.

Kudos to you for knowing and making this video.

[paulstubbs]

Nice, although what happened to the displays colon? kind of looks like it was attacked with sandpaper etc, and didn't light up in the end.

[gordongecko]

Why are you used only 4R, one per digit?
It makes not equal light efect. You should use 8, one per segment, plus colon. It's no critical cost. Extra: use SMD.
Decrease clock frequency, it does'nt need such fast speed. 1MHz will be enough.
Remove quartc resonator, caps, use internal RC clock.
Remove big stabilizator. Use li-po 4V2 battery.

[erlingsigurdson]

ATmega pins aren't particularly good at sourcing current. You'd better use 595 as a 7SD driver, or I2C driver IC.

[Dancopymus]

Hello friend! Thank you for sharing your project.
How would it be to replace the two buttons with an IR remote control? Could you share some example? Thanks

[shairobbins]

is it possible to use a 100uf 25v capacitor?

[davidw.]

Cool. Btw you could get an ESP32 for half the cost of the Atmega328 plus DS3231 combined, and have internet time sync ability. The circuit would be simpler too.

[circuitprovedlab]

laibary problem DS3231
i'm added this file. but not work.
maximum function not matching show .

plz all library file give me.

[RicardoAlmeids]

Please share the libraries used, I've already installed several and I can't compile them. Thanks

[akbarhussainsajid]

سپارکنگ لائیٹر بنانا دکھائیں۔دو اشیاء استعمال کریں جو بازار سے سستی مل جائے

[murageshkittur]

No code file in the Drive Plz share arduino code

[edutem]

Si compartes el codigo seria mejor asi lo podemos hacer

[jensschroder]

A 9 volt battery to get 5 volts?
You heat up 4 volts to get 5 volts?
So 45% loss?
Away with the 7805 and take 3x AA, 4.5 volts are enough.
Or 4x NiMH = 4.8 volts.

[r.karthikeyanr.karthikeyan]

What programe feed in ic it is. Not clearly in video

[mayank]

So the atmega328 ic should have
arduino bootloader installed ???

[iceberg]

neat. you have built what i have only dreamt to build, but never actually did. :D
but, i would have dropped the xtal and used internal clock instead.

[silexalger]

Merci pour votre partage. Malheureusement moi j'ai l'erreur à ce niveau ( DS3231 rtc(SDA, SCL); ) Pourtant j'ai installé la librairie Ds3231 et RTC ainsi-que RTCTime et Time

[rohanjose_]

Bro coding is not working. Any suggestions?

[何馬士]

I have this before, but not accurate enough since it uses MCP but not a real RTC chop.