What Are 7 Segments in Embedded Systems?

What are 7 Segments in Embedded Systems?

7 segments, otherwise known as seven-segment displays, are a common type of display used in embedded systems. These displays are composed of seven segments of LEDs (light-emitting diodes) arranged in a rectangular pattern. Each segment has two connections, which can be activated separately to create different numbers and characters. 7 segment displays can be used in many embedded applications, such as digital clocks and LCD displays.

The main advantage of 7 segment displays is that they are simple to use and understand. They can be used to display numeric digits with ease; simply controlling the appropriate sequence of segments will form the desired number. Additionally, they are compact and consume relatively low amounts of power, making them ideal for battery-operated devices.

In addition to displaying numeric digits, 7 segment displays can also be used for alphanumeric characters such as letters and symbols. By activating the appropriate combination of segments, any character can be represented. Although 7 segment displays are typically limited to only displaying one character or digit at a time, they can also be used to display multiple characters simultaneously by cascading multiple displays.

7 segment displays are low-cost, reliable, and simple to use, making them a popular choice for many embedded systems. They are used in a wide variety of applications, ranging from digital watches and thermometers, to medical devices and gaming consoles.

Each of the seven segments of the display can be individually controlled, and by turning on or off the appropriate segments, any digit from 0 to 9 or an alphabet can be displayed.

The seven segments are usually labeled from "a" to "g" and each segment is assigned a particular number, as shown below:

 

In order to control the 7-segment display, we need to use appropriate interfacing techniques like shift registers, latches, or microcontroller GPIO pins to turn on and off each segment.

The 7-segment display is commonly used in embedded systems to display numerical values, such as in digital clocks, temperature displays, or in calculators. It is also used in some industrial applications where numerical data needs to be displayed in a simple and easy-to-read format.