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Using LED matrix horizontally

The circuit in this Design Idea shows an unconventional way to use a 5×7 LED matrix. Read More...

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Pico-Projector Design with Color LEDs

In this paper we examine some of the challenges in maximizing screen brightness and efficiency and minimizing size to provide practical solutions that are attractive to the mass market. Read More...

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Adding Intelligence to LED Lighting

LEDs hold promise in the world’s race to produce more energy-efficient lighting. A major technological advance over both incandescent and fluorescent lighting, LEDs use less energy, last longer, and allow more control of color and direction of light. Read More...

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Bringing LED Control Into the Digital Age

To use an LED in a lighting fixture, the LED must produce much more light than the typical surface-mount LED most engineers are familiar with. From a design perspective, one of the key ways high-brightness LEDs differ from their low-light counterparts is that they draw more power and, therefore, require a more advanced control system. Read More...

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When LEDs become intelligent – Christmas lights aren’t just for December anymore

Starting with an off-the-the shelf string of individually addressable tricolor LEDs and an Arduino controller, the authors describe the process of creating an ambient information display from hacking to production. Read More...

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As Strong as the Weakest Link: Reliability from the LED System Perspective

This paper, presented at DESIGN West, discusses the reliability of an LED System from a practical point of view. Models are provided for the long-term reliability and lumen maintenance behavior of the LED component. Read More...

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White LEDs Printed on Paper—A Doctoral Thesis—Part IV

In the first part of this segment, ZnO/polymer hybrid LEDs characteristics will be explained. We will then look at CuO and ZnO/CuO nanostructures utilized as sensors and the procedure for sensing devices. Read More...

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The Nuts & Bolts of LEDs—Part IV

This will be a multi-part nuts-and-bolts series covering LEDs that begins with the characteristics of LEDs and moves on to driving LEDs. The two chapters involved are from Power Supplies for LED Driving, by Steve Winder. This segment discusses the topic of current source. Read More...

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The Nuts & Bolts of LEDs—Part III

Here is a multi-part nuts-and-bolts series covering LEDs that begins with the characteristics of LEDs and moves on to driving LEDs. The two chapters involved are from Power Supplies for LED Driving, by Steve Winder. This segment, from Chapter 3, discusses driving LEDs, beginning with voltage sources. Read More...

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White LEDs Printed on Paper—A Doctoral Thesis—Part III

Part III of this paper is an in-depth discussion of materials synthesis. Read More...

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