153 posts tagged with LED.
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Who did the big band version of Black Dog and where can I find it? [more inside]
posted by crazylegs on Apr 13, 2009 - 1 answer

Any advice, particularly construction/fabrication related, for this lighting oriented site-specific installation?

A couple of friends and I are organising a site-specific installation for the Smart Light Festival (flash w/ sound) to be held in Sydney from May 26 to June 14 this year. While I would appreciate any advice on bringing an installation like this to fruition, I was hoping specifically to get feedback on our plans to pre-fabricate the components (basically if they seem feasible, and if there are cheaper more efficient ways of going about it, how to use less energy, and especially how we could reuse or recycle the materials). [more inside]
posted by carnival of animals on Mar 18, 2009 - 3 answers

How to build a replacement bulb for my projector.

I'm looking to buy a projector off a classifieds site but the only issue is it requires a new bulb upon purchase. Besides the obvious problems that could come of this like having no way to proove that it works. I was wondering how difficult it would be to replace the lamp with some High powered LED's. [more inside]
posted by Chamunks on Mar 9, 2009 - 14 answers

Help me get started with basic electrical engineering!

Help me get started with basic electrical engineering! [more inside]
posted by gchucky on Mar 1, 2009 - 12 answers

Can a grow light save my plants?

I'd like to hang a small screw-in type grow light (not a giant florescent tube) above my plants to help them out. Possible? [more inside]
posted by washburn on Feb 16, 2009 - 10 answers


Where in Los Angeles (or within an hour's driving distance) can I get a whooooooooooole bunch of LR41 batteries on last-minute notice? [more inside]
posted by mykescipark on Dec 30, 2008 - 8 answers

Blinking LED novelties, retail, in Manhattan?

Moderate to large quantities of blinking LED novelties, retail, in Manhattan? [more inside]
posted by ellanea on Dec 19, 2008 - 1 answer

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

How do I make a light-based alarm?

I want to make an unobtrusive, light-based alarm to help me remember to take my pills. What do I need to do? [more inside]
posted by ocherdraco on Nov 11, 2008 - 7 answers

Four Years of Dedicated Service

Powerbook G4 (hardware?) woes, followed by death of battery LEDs. [more inside]
posted by Monstrous Moonshine on Nov 4, 2008 - 4 answers


Should we buy CFL or LED bulbs? [more inside]
posted by drstein on Oct 26, 2008 - 12 answers

WSXGA+ LED, where art thou?

LongshotFilter: Does anyone know if any 15.4" WSXGA+ panels with LED backlights are coming to market soon? [more inside]
posted by knave on Oct 24, 2008 - 3 answers

I want to use my iPhone 3G's headphone jack to power an LED.

How can I use the iPhone 3G's headphone jack to power an LED? [more inside]
posted by buzzbash on Oct 19, 2008 - 8 answers

Why can't I make this work? LED angst inside

Using a AA battery, two pieces of speaker wire and an LED, I am trying to make a simple circuit. I am meeting with complete failure. Help! [more inside]
posted by puckish on Aug 11, 2008 - 15 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

Is there any way to get an l.e.d. readout to stop fading?

I have a GE remote temperature sensor that uses an LED screen for a readout (black numerals against a grey background). REcently, the lines making up the numbers began to disappear. I replaced the batteries, but they still kept disappearing to the point that nothing is visible on the screen at all. Is there a solution to the problem or is this the end of the unit? For some reason, I thought these kind of readouts lasted forever.
posted by quintno on Jul 19, 2008 - 3 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

Best LED flashlights?

Best LED flashlights? [more inside]
posted by Irontom on Jul 9, 2008 - 23 answers

Help me whimsically prank some folks.

Where can I find some small, cheap flashing lights? It doesn't really matter what kind of light they are as long as they flash, a variety of colors would be nice but not necessary, the ability to turn them on and off is nice but not necessary, they shouldn't require a cumbersome power source but they don't need to last much longer than ten minutes, and I need to be able to obtain them by tomorrow (Saturday) in NYC. [more inside]
posted by doift on Jun 20, 2008 - 15 answers

How can I hide the light under a bushel?

I have a motherboard in my PC, with 3 extremely bright blue LED lights. I can't disable them, because they show whether or not there is a problem with the CPU, RAM, etc. Would putting something like Blutack over them damage them? [more inside]
posted by Don-da-lah on May 7, 2008 - 14 answers

LED Assistance

I am trying to buy a LED headlamp on ebay...they range in brightness from 8 to 30+ and the one I want is 8. Is that goint to be bright enough for pitching a tent in the dark? I tried to look up LED levels on the inter-web but all I found was scientific mumbo jumbo, can someone just tell me which one to buy please!? Thanks
posted by madmamasmith on Mar 29, 2008 - 13 answers

Visual Alarm

I need to design/buy a visual alarm for use with a PC. [more inside]
posted by edmz on Mar 29, 2008 - 8 answers

Getting my email LED working with Outlook/GMail

I am trying to get the Email Indicator LED on my Acer Aspire laptop working with GMail and/or Outlook 2007. The easiest way seems to be with some sort of POP emulator/pass-through. [more inside]
posted by d7415 on Mar 5, 2008 - 2 answers

A Light to Charge By?

How do I light the inside of a box? Cheaply. Efficiently. Blue-LEDly. AC 120ly. [more inside]
posted by notyou on Feb 10, 2008 - 7 answers

Go towards the light Carol Anne!

Is Al right? Am I really saving the environment by switching to CF bulbs? [more inside]
posted by Pollomacho on Dec 22, 2007 - 46 answers

Need a place to purchase around 50 LEDs in San Francisco

I need to purchase 30 to 50 orange or red LEDs by this Friday. Where can I get them as cheaply as possible in/around San Francisco? [more inside]
posted by agenais on Dec 5, 2007 - 10 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

Looking for certain kind of RS232 LED sign.

I'm looking for a small-ish (under 12") LED/message board sign that I can drive from a computer (RS232) that would allow me to change the messages in real-time. All the ones I've found either run off 12v or are battery powered. Bonus points if it can beep on command, too. [more inside]
posted by prggr on Oct 5, 2007 - 15 answers

LED T shirts!

LED Shirts! NYC? [more inside]
posted by modernsquid on Aug 15, 2007 - 0 answers

Where can I get a battery-powered LED clock?

Where can I get a battery-powered LED clock? [more inside]
posted by ManInSuit on Aug 6, 2007 - 14 answers

Need info on Chauvet stage fixtures

LDs, stage techs, pro musicians: what has been your experience with Chauvet lighting? Despite the goofy packaging, they have a couple of pretty innovative fixtures that I'm considering for a permanent install. [more inside]
posted by milquetoast on Jun 21, 2007 - 0 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

Will dimmer switches dim LEDs?

If I replace halogen bulbs with LED clusters, will my dimmer switches still work? [more inside]
posted by twine42 on Feb 20, 2007 - 8 answers

Flashlight up my sleeve?

Help me find a wristwatch with a built-in LED flashlight. [more inside]
posted by ostranenie on Dec 17, 2006 - 4 answers

What does this do?

Does anyone know what this is? I found it on the ground in a casino. It is just under 1" long and .5" in diameter. It is powered by a single G3-A CNB Micro Cell battery. The battery is usually used in laser pointers and probably LED device. This thing does not emit any light, but the battery might be dead. The only moving part is the clip. More photos here, here, and here.
posted by HSWilson on Dec 3, 2006 - 9 answers

Where's my future-car?

It seems that taillights have evolved rather radically from their humble origins, now featuring LED configurations spanning cars' entire back ends. Why hasn't this kind of innovation been seen with headlights? [more inside]
posted by limeonaire on Nov 25, 2006 - 15 answers

LED replacement for bike light bulb

Replacing a halogen bike light bulb with LED [more inside]
posted by primer_dimer on Oct 23, 2006 - 8 answers

How to invisibly provide power to an LED?

How could I have LED's on a pane of glass light up with no visible contacts like This amazing table? [more inside]
posted by Ookseer on Sep 2, 2006 - 28 answers

Lighted LED color display base WANTED

Help! Trying to locate an LED display color light base to light up a hand blown glass globe (to sit on top of the lighted base); attached find a link (http://www.ccl-light.com/docs/indoor/undercab/ledlight/ql-07c/index.html) for EXACTLY what i'm looking for, but they have a $100 minimum order and they won't let me just buy 1, and I can't locate anything similar anyplace else. I do want colored LED lights. Ideas?
posted by america4 on Aug 2, 2006 - 6 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

where are the LED shop lights?

Why can't I find LED shop lights? [more inside]
posted by Steve3 on Jul 1, 2006 - 15 answers

Green LED info wanted -- pure green, not yellow-green.

Tell me about the development of green LEDs. [more inside]
posted by Rash on Jun 13, 2006 - 21 answers

mini DV recording: blinking red light

Is there any way to disable the red blinking light (card access indicator) when I am recording with my Canon Elura 100? [more inside]
posted by foraneagle2 on Jun 8, 2006 - 17 answers

Evenly light an irregular shape from behind?

I have an irregularly shaped metal object that I want to light up from behind. I want to the lighting behind it to be very even. [more inside]
posted by dmd on Jun 8, 2006 - 11 answers

LED Array and Sign Howto?

How do I make an computer-controlled (and PIC-controlled) LED matrix? [more inside]
posted by yellowbkpk on Mar 25, 2006 - 8 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

Bluetooth keyboard with status LEDs?

Are there any Bluetooth keyboards with on-keyboard status lights like caps lock, num lock, and scroll lock? [more inside]
posted by adamwolf on Dec 18, 2005 - 8 answers

Manufacturers of display signs

Looking for manufacturer, patent info of electronic display signs. [more inside]
posted by miniape on Sep 22, 2005 - 6 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

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