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

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 on Jul 19, 2008 - 3 answers

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

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

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 on Jun 20, 2008 - 15 answers

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 on May 7, 2008 - 14 answers

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 on Mar 29, 2008 - 13 answers

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

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 on Mar 5, 2008 - 2 answers

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

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

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 on Dec 5, 2007 - 10 answers

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 on Nov 13, 2007 - 13 answers

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 on Oct 5, 2007 - 15 answers

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

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

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 on Mar 3, 2007 - 23 answers

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

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

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 on Dec 3, 2006 - 9 answers

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 on Nov 25, 2006 - 15 answers

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

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

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 on Aug 2, 2006 - 6 answers

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

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

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

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 on Jun 8, 2006 - 17 answers

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 on Jun 8, 2006 - 11 answers

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

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

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

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

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

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 on Mar 10, 2005 - 16 answers

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? [+]
posted on Oct 26, 2004 - 9 answers

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]
posted on Aug 29, 2004 - 14 answers

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]
posted on Aug 9, 2004 - 17 answers