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22 posts tagged with LED and electronics. (View popular tags)
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DIY LED Light Panel

I would like to learn more about electronics and circuitry by making a LED light panel. I have questions about how to calculate the number of LEDs I need, soldering, and how to diffuse the light. [more inside]
posted by gagoumot on Aug 2, 2012 - 2 answers

What do I need to assemble a simple LED light?

Can anyone recommend a book or website to help me in making a small led light? [more inside]
posted by InkaLomax on Dec 18, 2011 - 1 answer

High Power LED help.

Electronics help. I'm looking for a good informational/tutorial web site for working with high power LEDs 5 Watts and up. [more inside]
posted by Eekacat on Oct 23, 2011 - 11 answers

How do I run 20ish LEDs with a LED Driver built to run 1 large LED ?

I want to drive 20ish LEDs, should I run them as series or parallel and why ? [more inside]
posted by 70klicks on Jun 20, 2011 - 8 answers

LED lightbulbs are illuminating but not illuminating.

What is going on in LED lightbulbs? I mean the devices, not the industry. [more inside]
posted by chairface on May 11, 2011 - 9 answers

Circuit for headlight LED works, but I don't know why

It's been cold recently (-15C) and I burned out two bulbs in my dutch bike's headlamp in a short time. Since the bulbs are hard to find, I thought this was a good time to replace the bulb with a 1-Watt LED light. What I built works, but I don't quite know why. [more inside]
posted by kamelhoecker on Feb 20, 2011 - 9 answers

Circuit/Battery combos for driving a single 5mm LED

I'd like to use a single 5mm UV LED (3.4Vf, 20-25mA) to charge a daub of glow-in-the-dark paint. It only needs to be lit around 1 minute of every 10 (or 6 seconds of every 60), and only when the (room) lights are out. What battery/circuit would be most economical to operate, and require the least-frequent battery changes? [more inside]
posted by jjjjjjjijjjjjjj on Jan 18, 2011 - 6 answers

Circular LED Displays?

Circular multi-segment LED displays? Who makes them? [more inside]
posted by Marky on Oct 13, 2010 - 2 answers

Electronic Catan

I want to create a customized Settlers of Catan board. For the purposes of this question, it could also be a custom Monopoly board. I want the pieces ( cities / hotels ) to light up when they are placed on the board. I know I would put LED's in each piece, but besides that, I am not sure if or how I could power up the LED's. I am not an electrical engineer, but magnets, watch batteries or inductive charging sound good to me. Help me make an awesome electronic board game!
posted by jasondigitized on Sep 4, 2009 - 8 answers

Table Hockey in the dark?

Table Hockey in the dark? [more inside]
posted by DrAlbin on Aug 5, 2009 - 5 answers

How is this color-changing LED array being driven?

Electronics/LED Folks: I bought a few cheap, poorly-assembled LED color-changing orb-things and I'm pretty sure they're the coolest objects I have ever owned. I cracked 'em open, and damned if I know what is going on in there, but it looks simple/cheap as all hell. Help me figure it out, I'll post a build-log/parts list somewhere, and in short-order we can all be ass-deep in home-made, disarmingly sublime mood-lighting. [more inside]
posted by jjjjjjjijjjjjjj on Nov 18, 2008 - 28 answers

Scrolling LED message sign

Where to buy electronic scrolling LED message sign ... in person? [more inside]
posted by msacheson on Jul 22, 2008 - 4 answers

Where can I find people who like to know 'how stuff works' in socal?

Where around socal can I meet other aspiring electronic do-it-yourselfers? [backyard imagineering] [more inside]
posted by tarthur on Jul 19, 2008 - 6 answers

Simple, small, cheap accelerometer/LED?

I'm looking for a simple, small and cheap way of measuring acceleration. Basically, I want to make a set of LEDs light up if they are accelerated significantly, becoming brighter the faster the acceleration happens. [more inside]
posted by Zarkonnen on Nov 13, 2007 - 13 answers

Need some help designing and building LED light strips for an interactive table

Need some help designing and building LED light strips for an interactive table -- help me select 880nm IR LEDs, understand the circuitry, and figure out how to deal with power. [more inside]
posted by warhol on Mar 3, 2007 - 23 answers

Where can I find a large 6 ft. segmented LCD display?

Where can I find a large (> 6 ft.) segmented LED display? [more inside]
posted by ostranenie on Jul 26, 2006 - 4 answers

How can I drive a LED as a light-emitter and a photo-diode simultaneously?

ElectronicsFilter: How can I drive a LED as a light-emitter *and* a photo-diode simultaneously? [more inside]
posted by stungeye on Feb 15, 2006 - 30 answers

What should I do with these LEDs?

After a trip to BestHongKong, I find myself with 1000 5mm red LEDs. What should I do with them? [more inside]
posted by Neon on Apr 20, 2005 - 10 answers

Trippy Filter: Costume for Burningman

I've got an idea for a costume for Burningman, but I'm going to need a bit of electrical help to figure it out. I want to use A set of LED's like these connected to cheap hobby quality fiber optic cable ala This sort of chintzy stuff. [more inside]
posted by Freen on Mar 10, 2005 - 16 answers

Robot Costume

My little boy wants to be a robot for Halloween, and I'd like to include a 60's style bank of randomly blinking lights on his robot chest. Cardboard and spraypaint I know and can work with; electronics, not so much. Is there a fairly easy and cheap way to do such a thing? [more inside]
posted by crumbly on Oct 26, 2004 - 8 answers

Recommend a book that will help me make simple electronics?

I want to learn how to make simple electronics, like LED controllers that I can hook up to a serial port. Can anyone recommend a book to get started with? [more inside] [more inside]
posted by krunk on Aug 29, 2004 - 13 answers

LEDs via Radio Frequency

Electronics filter: Need to build something that'll light up different LEDs via radio frequency. Must be compact and battery powered. My electronics-fu is pretty good, but I'm not sure it's this good... [mi] [more inside]
posted by SpecialK on Aug 9, 2004 - 16 answers

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