Simplest Arduino Clock With 7-digit segment display

From time to time, I’m also working on less “web” related project. This time, a wanted to play a bit with Arduino platform. The task was pretty simple – to build a clock. Yes – these days, we don’t have enough time measuring devices like mobiles, microwaves, computers – I wanted to build another one.

It was my first Arduino project so the task wasn’t  as easy as I expected. In the theory, we need only pass time & data from RTC to 7-Segment Display. Simple isn’t it? I found plenty of tutorials, had so many small issues like – digits wasn’t displayed correctly (mixed cables). I could only display one digit at the time in given position or – same digits everywhere (multiplexing). I couldn’t find shift register in my stock, so wanted to use whatever I already had.

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