How To Build An Arduino Binary Clock For Hours And Minutes

Arduino Binary Clock (hours, minutes and seconds)
Arduino Binary Clock (hours, minutes and seconds) from


Are you interested in building your own digital clock that uses binary code to display the hours and minutes? With the help of an Arduino board and a few electronic components, you can create a unique and functional clock that is sure to impress your friends and family. In this article, we will guide you through the process of building an Arduino binary clock for hours and minutes.

What is a Binary Clock?

A binary clock is a clock that displays the time in binary code, rather than in the traditional decimal system. Each digit in the time is represented by a series of on/off LEDs, with each LED representing a power of two. For example, the hours digit might be represented by four LEDs, with the leftmost LED representing 8, the next LED representing 4, and so on.

Step 1: Gather Your Materials

To build an Arduino binary clock for hours and minutes, you will need the following materials: – An Arduino board (such as the Arduino Uno or Arduino Nano) – A real-time clock module (such as the DS1307 or DS3231) – A 4-digit 7-segment LED display (such as the TM1637) – Jumper wires – Breadboard – Resistors (220 Ohm)

Step 2: Wire the Circuit

The first step in building your Arduino binary clock is to wire the circuit. Begin by connecting the real-time clock module to the Arduino board, following the wiring diagram provided by the manufacturer. Next, connect the 4-digit LED display to the Arduino board, using the appropriate jumper wires and resistors. Finally, connect the power supply to the breadboard, and plug in your Arduino board.

Step 3: Write the Code

Once your circuit is wired and ready to go, it’s time to write the code that will control your binary clock. You can find sample code online, or you can write your own using the Arduino IDE. Be sure to include instructions for reading the time from the real-time clock module, converting the time into binary code, and displaying the binary code on the LED display.

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Step 4: Test Your Clock

With your code uploaded to the Arduino board, it’s time to test your new binary clock. Set the time on the real-time clock module, and watch as the LED display lights up with the binary code for the current time. You may need to make some adjustments to your code or wiring to get everything working correctly, so be patient and don’t be afraid to experiment.

Tips for Building Your Binary Clock

– Start with a simple circuit design, and build up from there as you gain experience. – Test your code frequently to catch any bugs or errors before they become a problem. – Use high-quality components to ensure your clock is reliable and accurate. – Consider adding additional features, such as an alarm or a temperature sensor, to make your clock even more useful.


Building an Arduino binary clock for hours and minutes is a fun and rewarding project that can teach you a lot about electronics and programming. By following the steps outlined in this article, you should be able to create your own unique and functional clock in no time. So what are you waiting for? Grab your Arduino board and get started today!

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