Hello Make: readers

Hello and welcome to all the readers of MAKE: blog, who kindly wrote up my site today. Please take a look around, have fun, and if you like to talk ...
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The LED dance floor craze

The original MIT LED dance floor project has inspired some imitators it seems, and there’s good reading to be had on their blogs. Let’s take a look at some of ...
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One-cell LED flasher circuit

Are you looking for a circuit that lets you flash or drive an LED from a single battery? This article from EDN has just what you’re looking for: Simplified white-LED flasher ...
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justDIY: Three Watts of Light

Forum member and moderator JustDIY has posted an informative, illustrated project walkthrough titled Three Watts of Light. Check it out and learn about his experiences working with some 1-Watt ...
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Light bulbs waste power

In an interesting article titled Light bulbs – the neglected power consumer in LEDs Magazine, there’s an intersting point made in passing that I never considered when it comes to ...
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Wired magazine : blue LED backlash

This Wired article is somewhat amusing, but possibly a harbinger of a shift in consumer preference. Bright blue LEDs in products are getting an increasingly negative reaction from consumers, according ...
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Breadboarding for Beginners

Breadboard is the common term for a solderless prototyping board for electronic circuits. Using a breadboard is a good way to try out different circuits wihtout the need to learn ...
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Surface mount LEDs

Surface mount devices (SMD) are more common than ever thanks to miniaturization. LEDs inside disk drives, modems, and small personal electronic devices are more often SMD devices these days. ...
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The myth of the 5 volt LED

A commonly encountered question on message boards and in my email inbox deals with the elusive “5V LED,” and goes something like this: I have a 5V blue LED, can ...
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How is LED brightness related to current?

Another way to ask this question would be “what is the best drive current for my LED?” What I encounter frequently is people using the maximum ratings provided by the ...
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A cheap, current-regulated Luxeon Star driver design

I came up with this idea, tested it and implemented it a while back, but I never got around to writing the article. So here’s the first new circuit article ...
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Why do I need a resistor with an LED?

Why do you need a resistor with an LED? The short answer: to limit the current in the LED to a safe value. The long answer: LEDs are semiconductors, diodes in ...
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