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Light emitting diodes (LEDs) have a wide variety of uses in modern electronics, created using semiconductor technology. They have been used to create circuit board indicator lights, arrays, light bars, and bar graphs – each of which provides a particular visual feedback to help control, monitor, and measure the functionality of electronics.

Circuit Board Indicators

Circuit board indicator lights are LEDs that are used to provide status information about an electronic circuit. They can indicate power, energy consumption, system failure, or other inputs. Indicator lights are typically connected to a circuit to draw power from the same source, saving designers from having to use separate wires for power and indicators.

LED Arrays

LED arrays are comprised of multiple LEDs arranged in a pattern to form a larger light fixture. The light fixtures are most often used for aesthetic purposes, such as providing decorative lighting in homes, but they are also useful for providing visual feedback in the form of indicators or lighting patterns in applications such as in video walls and outdoor displays. Arrays can also be used to create interactive lighting, such as a display that changes its brightness and color when a user interacts with it.

Light Bars

Light bars are made up of multiple LEDs arranged in a row or a curved pattern. They are typically used to provide a visual indication at night, such as traffic lights, signs, and car headlights. Modern light bars are also used in automatic equipment, providing information about parameters such as speed, pressure, or temperature in large scale industrial operations.

Bar Graphs

Bar graphs are created by arranging multiple LEDs in a vertical or horizontal line, then lighting them in a particular pattern to form a bar graph. Bar graphs are most often used as visual feedback for audio systems, providing visual indication of the audio output or changes to the audio waveform. They can also be used to display changes in temperature, power output, or any other parameter.

LEDs are a versatile form of light-emitting technology, used in a variety of applications to visually indicate the status of a system or provide aesthetic lighting. From indicator lights to light bars and bar graphs, they offer a convenient and energy-efficient way to supply visual feedback.

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