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LEDs, or light-emitting diodes, are small, energy efficient light sources that are used in a wide variety of applications. LEDs are available in a range of colors and sizes, and they can be used to provide illumination or be used as indicators. They are also used as circuit board indicators, arrays, light bars, and bar graphs.

Circuit Board Indicators

LEDs are commonly used as circuit board indicators, and are typically found on the front panel of electronic devices. A circuit board indicator\'s primary purpose is to indicate the status of the device, and help guide the user in understanding the output and functions of the system. LEDs are preferred as they are energy efficient, long lasting, and require minimal space on the circuit board. LEDs are usually connected to a power supply, either directly to the board, or sometimes through a resistor or capacitor. A controller on the board will then control the LED, usually turning it on and off, or changing the output level.

Arrays

LED arrays are systems of multiple, individually addressable LEDs that are connected in a row and are used to create patterns or to display data. An important part of an LED array is the controller, which allows each LED to be independently turned on or off. The controller can also be used to alter the brightness of each LED in the array to create gradients or to respond to signals from other systems. LED arrays are typically found in larger scale applications such as stage lighting or architectural lighting.

Light Bars

Light bars are a type of LED array that is made up of multiple LEDs that are arranged in a row or a pattern. They are typically used as indicators, either to display data or as indicators for various functions and status. Light bars are usually used as an external indicator, placed on the outside of an electronic device to provide quick indication of the active functions. They can be used in a variety of applications, such as warning displays, measuring bars, or as a location indicator.

Bar Graphs

Bar graphs are another type of LED array that are often used to display data in graphical form. Each individual LED can be turned on or off, or can be set to different brightness levels, allowing a string of LEDs to be used to create a graph. Bar graphs can be used to display voltages, temperatures, pressure, or any other data that needs to be monitored. Bar graphs are often found as external indicators on electronic devices, as they are more visually descriptive than light bars or other types of indicators.

LEDs are very versatile and are used in a wide variety of applications, from simple indicators to complex visual displays. Light bars, circuit board indicators and bar graphs are just a few of the types of LEDs that are most commonly used in these applications. LEDs provide an energy-efficient, long lasting, and reliable source of light, and are ideal for a variety of applications.

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