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LEDs are an essential component to any electronic circuit, both for their resistance to harsh environments and for their ability to generate light in a wide range of colors.The emergence of LED technology has pushed microcontrollers and other semiconductor components to the forefront of technology. LEDs are used in many applications, including for circuit board indicators, arrays, light bars, and bar graphs.

Circuit Board Indicators

LEDs are one of the most common circuit board indicators, being readily available and comparatively inexpensive. LEDs differ from other kinds of light sources like incandescent bulbs because they do not require an external power source, as they can be powered directly from the circuit board. LEDs are also highly efficient, meaning less power is required to operate them and they can remain on for long periods of time. LEDs are widely used as circuit board indicators and come in many colors and brightness levels. For example, a red LED might indicate a system error, while a green one might be used to show a successful operation.

Arrays

LED arrays are used to create shapes and designs on a display, using multiple LEDs in combinations. The LEDs in an array may be used to display text, shapes, images and other patterns. Arrays of LEDs can also be used to create illuminated signs, such as neon signs, using a combination of different colors. LEDs offer an advantage over other kinds of light sources in sign displays, as the shapes can be curved without much difficulty.

Light Bars and Bar Graphs

LED light bars and bar graphs are becoming increasingly popular as user interfaces. Light bars are usually composed of multiple LEDs in a linear configuration, while bar graphs usually consist of LEDs placed in a row or column with each LED representing a bar. Light bars and bar graphs can be used to indicate progress, as in progress bars or to indicate a comparison between two or more values, such as with bar charts. Light bars can also be used to indicate whether a system is on or off.

Summary

LEDs have become indispensable components of modern circuits, being used in a wide variety of applications. LEDs are commonly used for circuit board indicators, arrays, light bars, and bar graphs. LEDs offer a number of advantages over other light sources, such as low power requirements and a wide range of colors, as well as the flexibility to create curved shapes. As more applications move towards digital interfaces, the use of LED technology is sure to continue to increase.

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