Learn how to use 7-Segment LED Display using Arduino

Posted on Feb 6, 2014

7-Segment LED Display is a very useful component, but also a very confusing and difficult piece to use for beginners. It won`t be difficult once you get it working for the first time. It basically consists of 7 LEDs, (8 if include decimal point). Just like controlling a single LED, we need to connect each segment LED` to a Arduino digital pin. Here

Learn how to use 7-Segment LED Display using Arduino
Click here to download the full size of the above Circuit.

is the circuit diagram of the LED display: You might notice, there are 2 different type of them, don`t be scared by them, because in the market, the Common Cathode  type is the most popular so you won`t need to care about the other type. Basically, all you need to do is to connect each LED with a pin, and connect the shared Gnd connector to the ground pin. Next you will need to program it, sorequired LEDs are switched on todisplay different number. I have created a class for using the 7 seg LED display, it`s not a complete working class, but gives a few very useful basic functions. Feel free to expand it and add new useful functions, or create your own class.

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