Arduino UNO: DS1302 : Clock keeper; 4-digit 7 segment LED: Display time. 4 buttons: Controlling clock: 1 button to start clock. 1 button to swtich digit. 2 buttons for increment and decrement value. 2 ...

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There are so many nice hacks in [Joekutz]’s retro LED display project that it’s hard to know where to start. There’s his DIY LED display controlled by an Arduino UNO. To have some… ...

The Arduino Uno reads the time from a DS1302 real-time clock (RTC) module. The RTC module is crucial for keeping accurate time, even when the Arduino is powered off.

If the rotation is clockwise the binary count is incremented by one, and this count is shown in LED port as shown in figure. If the rotation is Anti clock wise the binary count is decremented by one ...