![]() ![]() If this pattern is controlled in a specific way by turning on and turning off LEDs, a seven-segment device will display a unique number. These light-emitting diodes are arranged and packed inside a single display with a specific pattern in mind. Let’s start the main part of this tutorial by answering a question: what is a seven-segment display? As its name suggests, a 7-segment device consists of 7 light emitting diodes. One of the popular examples for the use of a seven-segment display is the NASA space shuttle launch countdown display. The seven-segment display has many applications in embedded systems and Arduino based projects. ![]() For example, if you are designing an ac voltmeter or ac current meter using Arduino, you can use a seven-segment display instead of a 16X2 liquid crystal display to display voltage and current values.
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