Arduino seven segment display using individual LEDs

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1

My latest project is seven segment display using individual LEDs displaying the time. I am also using DS1307 (RTC) with battery backup, i am also using the Arduino Micro as the brains. I originally used the UNO on the bread board before using the Micro on perf board. A word of caution if migrating source code from UNO to Micro. SDA is on pin 2 of the Micro and SCL is on pin 3 of the Micro. I found this out the hard way when i was scratching my head wondering why my display was freaking out.
Anyway you can find the project from here: Make your own digital clock - YouTube
You will find the source code and schematic/wiring diagram in the description of the video.

Thanks Lester

ArduinoClock.jpg
ArduinoClock.jpg2016×1512 715 KB

2

Good work.

Suggest you flash the : at 1Hz, let's you know things are work and makes things look dynamic.

For better accuracy use DS3231 RTC better than 7 sec per month, it is software compatible with 1307.

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3

LarryD:
Good work.

Suggest you flash the : at 1Hz, let's you know things are work and makes things look dynamic.

For better accuracy use DS3231 RTC better than 7 sec per month, it is software compatible with 1307.

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Hi, I originally did flash the ":" every sec, however i made the unit for my son for his bedroom and he din't like the flashing at night. I used the DS1307 because thats all i had lying around at the time. I will look at the DS3231 thanks

4

You could use a PWM pin to slowly dim then brighten the :

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5

LarryD:
You could use a PWM pin to slowly dim then brighten the :

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good idea that, i may have a tweak!

6

Software is never finished with. :wink: