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LEDs - Circuit Board Indicators, Arrays, Light Bars, Bar Graphs

Light Emitting Diode (LED) technology has been around for decades, but its popularity and usage has seen dramatic increases in recent years. LEDs offer many benefits compared to traditional lighting technologies and a new generation of applications. LEDs are being used in increasingly more diverse and intricate projects. These projects range from automotive lighting, to lighting for architectural displays, to commercial and industrial applications.

LEDs are tiny, solid-state devices that typically draw very little power,emitting light when an electrical current passes through them. There are various styles and constructions of LED devices, including circuit board indicators, arrays, light bars, and bar graphs. LEDs can be used to provide a wide range of lighting effects and varying levels of brightness, from a simple indicator light to complex multi-color arrays.

Circuit Board Indicators

Circuit board indicators, or LEDs, are light-emitting diodes mounted on a circuit board or integrated circuit. They are generally very small in size and come in a variety of shapes and sizes, including round, rectangular and square. Circuit board indicators are a great way to add warning indicators, decorative lights, or light up an area such as an instrument panel. They can also be used to indicate when a circuit is active or there is a potential issue with a device. Circuit board indicators can be easily interfaced with microprocessors, making them ideal for digital systems.

LED Arrays

LED arrays are small groups of LEDs in a single package that is used for multiple effects. An LED array can be used for a variety of lighting effects, such as directionals, chasing, twinkling, flashing, or animated effects. The number of LEDs in an array can vary, but typically ranges from three to twelve. Arrays are generally very affordable and easy to install.

Light Bars

Light bars are a combination of an array of lights and a frame. Light bars can be used to light up areas or can be used to create special effects. The frames are typically a box of some type and the circuits are integrated into the frame itself. Light bars can provide a consistent light source or can be used to create effects such as alternating colors or chasing lights.

Bar Graphs

Bar graphs are basically multiple LEDs mounted in a row or column configuration. The bars could indicate levels or graphic patterns. They are mainly used in applications that require the display of varying levels of digital values or charts. The LEDs can be lit in various colors or brightness levels to indicate the various data points.

Working Principle

LEDs are basically semiconductor devices that emit light when an electrical current passes through them. An LED is basically a p-n junction diode with a wide band-gap material that emits light when an electrical current is passed through the device. The amount of light emitted is determined by the current and the material used to create the p-n junction.

The light emitted by an LED is a function of the current and the materials used to create the diode. The current also affects the temperature of the diode and can cause it to reduce in brightness or overheat if the current is too high. The current also affects the color of the light emitted, with a higher current resulting in a brighter light or a different color. The amount of current required to achieve a desired light output will depend on the LED and the materials used to create the diode.