ElectronicsFilter: I would like to construct a box with 4 lights that work on a timer. I know lots about software, and little about hardware, please help steer me in the right direction. [more inside]
posted by sparklemotion
on Aug 24, 2014 -
I have a deck, and it needs a light fixture next to the door. There's no electricity on the deck, and I can't cut through the wall (mounting a fixture to the siding is fine). Do they make battery-powered, wireless, remote-controlled exterior light fixtures? [more inside]
posted by mgar
on Jul 7, 2014 -
This is the appliance in question.
I'm aware that Tokyo's electrical system is 100 volts at 50 Hz, but I'm not sure how that applies to this rope light kit, which is rated for (according to the instructions) 120V, 60Hz, and 100 mA. Does the low current/wattage (12 watts) mean it will work anyway, due to some transformer inside, or is it just not going to be compatible?
posted by Maximian
on Jul 2, 2014 -
I came across this article
and became concerned about my eye health, in light of a new LED monitor that I recently bought and use for about four hours each day at home (at work, I look at an older LCD monitor with a CCFL backlight for eight hours).
Is this something to be concerned about? Also, can some sort of (UV) filter be placed in front of the screen to reduce risks? Currently, I have my LED monitor set to 0% brightness and 25% contrast.
posted by kalsifur
on Jul 2, 2014 -
I need a professional level (able to color calibrate) television/video monitor to use a client monitor. [more inside]
posted by matt_od
on Jun 18, 2014 -
Making a desktop clock out of a 24-hour clock movement, a globe, and an LED. Help me design it within! [more inside]
posted by rebent
on Apr 8, 2014 -
I'm trying to help a friend locate a replacement LED Left Side Head Light Cluster for a 2006 Ford Mondeo Titanium (as seen in CASINO ROYALE). Preferably in the UK but anywhere would do - sadly everywhere I look has nothing available... thank you all in advance!
posted by timpollard
on Apr 3, 2014 -
I am looking for ways to simplify/automate my apartment. Things like automatic lighting, automatic fridge contents lists, everything turning on/playing music when I enter my apartment, and any other household hacks. I don't have android OS. [more inside]
posted by bbqturtle
on Mar 18, 2014 -
I'm remodeling the house and have converted everything to can lights. I have to go buy about 36 PAR30 bulbs and about 12 PAR20 bulbs. Where can I get the best deal? Difficulty: NO EBAY. [more inside]
posted by jeffamaphone
on Mar 17, 2014 -
Can anyone link me to some place I can buy a lightbulb the same brightness and size as a 100 watt incandescent bulb? [more inside]
posted by ayc200
on Nov 2, 2013 -
I want to start messing with LEDs; I have two (similar) projects in mind. I want a strip of multi-colored LEDs to respond to music. And second, inspired in part by this thread
, I'm interested in learning about turning sound-responsive LEDs into a costume. I imagine those two projects are pretty similar, other than needing a portable power supply for the latter, right? So, can anyone help me figure out what I should get to start with? [more inside]
posted by inigo2
on Oct 28, 2013 -
My bathroom has six light bulbs in it and, to my shame, they're incandescents. I'd like to replace them with LEDs so I never have to think about them again. Which LED bulbs are most like your standard 60W incandescents? [more inside]
posted by The corpse in the library
on Oct 10, 2013 -
Winter has come. Because of my schedule and the late sunrise/early sunset, I find my daily run is happening in the dark morning or dark night. [more inside]
posted by atomicstone
on Oct 4, 2013 -
I'm planning a project to put strips of LED lights on my jacket to increase my day-time visibility in heavy LA traffic, which I commute through every day.
So far, I have a general plan, but I'm a little unsure of California laws regarding lights, and I have never actually worked with LEDs before so I'm looking for tips/tricks/suggestions to make it work. [more inside]
posted by brenton
on Aug 16, 2013 -
I want to make a choker/necklace with some sort of glowing red "jewel" in the center for Halloween... [more inside]
posted by JoanArkham
on Aug 5, 2013 -
I bought a number address plaque from Etsy and I love it. However, the wall it is mounted to is blue, and consequently it is pretty difficult to read the sign from the street. I'd love to mount something behind it to solve this problem. [more inside]
posted by cacophony
on Jul 13, 2013 -
I have a large room that I would like to illuminate with LEDs. I'm thinking of putting a ledge around the the walls about 45 cm / 18 inches from the ceiling and laying LED strip lights along it, directed upwards so they bounce off the walls and ceiling (which are painted white). Would this look weird? Would it light the room adequately? I'd make the ledge with a groove in the top surface so that you can't see the LED lights from floor level. [more inside]
posted by Joe in Australia
on Jul 7, 2013 -
Dimmable LED light bulbs seem more economical than halogens. But they're really expensive. Will they quickly come down in price, so I should wait? Or will they come down slowly, so I might as well start saving?
Also, how good is the dimming? I tried dimmable CFL's, but they don't seem to dim past 50%.
posted by musofire
on May 9, 2013 -
When converting from halogen downlights to LEDs, if it's going to be a difficult job either way, is it better to replace MR16 sockets + transformers with GU10 sockets or just to use LEDs that are designed for MR16 set-ups? (Assume that I already know that the specific transformer I have would work with the specific LEDs I would buy). And if I want to convert, where can I buy cheap GU10 sockets with Australian 3 pin plugs wired to them (without buying an entire "LED downlight kit")? [more inside]
posted by lollusc
on Mar 6, 2013 -
We haven't had a proper TV in over a decade. I would like to have something other than my laptop to watch streaming media, DVDs, Netflix, etc. Can you explain how this works in 2013? I imagine we'd buy something like this Samsung LED HDTV
and some kind of speakers. Then what? Do we plug it into a laptop? What exactly is Apple TV and how does it stack up against Roku? This seems like it should be a simple question, but I feel like a caveman emerging from the dark, and am fairly bewildered at all of the options and variations out there. [more inside]
posted by barnone
on Feb 11, 2013 -
While changing a bulb in one of our rooms, replacing a LED with a CFL because of a need for brighter lighting in this work area, it suddenly hit me: Why does an LED light have a bulb? In both incandescent and CFLs, the bulbs trap gas (or vacuum as the case may be.) But why an LED? It doesn't use a gas and it doesn't need to operate in a near-vacuum for efficiency. Closer examination showed that the bulb was plastic and had no lensing effect.
This question is almost answered here.
Because of the question regarding heat sinks (which seem much reduced in modern LED lights, I'm guessing the answer is because they get hot. So I'm guessing that's what it is, though I also think that having a bulb makes it easier to screw into the socket. Taking these points together, I can imagine getting a burn if there was not bulb by brushing up agains an LED stalk that was on until a few seconds ago when you decided to unscrew it.
So...have I answered my own question or is there more behind the bulb?
posted by BillW
on Jan 29, 2013 -
What are your favorite LED christmas lights that are closest to incandescents in warmth and glow? [more inside]
posted by hazel
on Nov 28, 2012 -
How can I continuously run a 3W - or less - LED light with +/- 350 lumens as long as possible (1 year minimum) with a relatively compact battery source? [more inside]
posted by xod
on Nov 14, 2012 -
Can I use a CFL or LED bulb in an outside flood light type fixture that is hooked up to an in-wall Intermatic timer? I was told no but I would like to confirm. If that is the case, I'd love a short explanation in plain English. I tried Googling but I'm still confused. [more inside]
posted by dottiechang
on Nov 10, 2012 -
Looking for a LED light that gives an equivalent brightness and spectrum as a 40W incandescent. Can you help me? [more inside]
posted by sciencegeek
on Aug 25, 2012 -
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 -
I would like to use LED lighting in my apartment and be able to change colors and brightness. how do I go about that? [more inside]
posted by krautland
on Jul 5, 2012 -
A friend's got a Samsung LED TV which has two input jacks (appears to be the "3.5mm" type) for Component signal - 1 socket for video (red, green, blue) and 1 for audio (red, white). Problem is: where do I find these cable adapters so we can connect (5) component cables into these (2) input jacks? [more inside]
posted by gttommy
on May 20, 2012 -
I'm doing a craft project and would like to install two red LEDs that are powered by a battery pack with an on/off switch. I would love your opinion-advice on what to buy and where to buy it. [more inside]
posted by komara
on Jan 25, 2012 -
Where can I buy 50W equivalent LED lights that work outdoors, operate at 120V, and are of the standard base type? I simply cannot find a bulb that meets all three criteria! [more inside]
posted by The Hyacinth Girl
on Dec 18, 2011 -
What is the best direction to go in for LED accent lighting/throwies on a budget that demands maximum bang for the buck? [more inside]
posted by RolandOfEld
on Dec 17, 2011 -
Help me find or make a shade of some kind for my recessed kitchen LED lights. [more inside]
posted by kindall
on Dec 1, 2011 -
Concerned about "backlight bleed" on Samsung 40" I just bought, can you help me out? [more inside]
posted by ascetic
on Nov 26, 2011 -
I'm looking for a physical countdown clock that counts down to an arbitrary time. Ideally, it would be similar to the one that Robert Khoo has in the Penny Arcade TV Show. I believe this
is the clock in question and that underneath the "New Year" is a whiteboard. If I could find one just like this, that would be great, otherwise any digital countdown clock would work fine.
posted by mge
on Oct 26, 2011 -
School me on light bulbs! My lamp and overhead light bulbs just died, and I'd like to use the opportunity to rethink the type I'm using. I'm totally ignorant in this area, so I'll give as many details as possible, inside the fold.... [more inside]
posted by UniversityNomad
on Oct 25, 2011 -
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 -
I would like to buy a home entertainment system. I would like to listen to music, watch television, movies, and play videogames. I would like to have Netflix. I would like to stream media from my network or the cloud. I want great sound but I am not an audiophile, although I am not averse to spending a lot on speakers. I do not want to spend more than 8 hours doing research. I will spend up to $2500-$3000. How do I attack this problem? Can you recommend specific TV's, receivers, speakers, or stuff like a Roku box? Can you recommend sites that provide easy to understand, objective reviews of equipment like TelevisionInfo
? I do not want to hit the forums if I don't have to. Can you recommend specific configurations of equipment or point me to sites that supply this information. I feel like if I don't get pointed in the right direction, I am going to over analyze this and spend far too much time that I don't have. I just want a rocking home entertainment solution for my family that I won't want to upgrade a week later.
posted by jasondigitized
on Sep 9, 2011 -
I'm setting up my "off the grid" solar lighting system in my home, and I'd like to connect the battery to some LED lights. It's a 12 volt DC battery - Do my lights have to be 12 volt also? If they're LED bulbs, they'll have a transformer inside; will that allow me to use them, or do I have to have a voltage converter or something? I've got some edison-style LED bulbs around the house for 85-265 volts.
Thanks in advance for any help. pictures and web links that can explain things simply are helpful. (An earlier, relavent post:
posted by eggrollover
on Jul 5, 2011 -
I would like to buy a 32 inch LED TV. What brand do you recommend?
posted by Tziv
on Jul 5, 2011 -
How to calculate the cost of LED lighting. Or... renting my apartment, LED lights, energy conservation and fiscal sense. Please help me! [more inside]
posted by gen
on May 9, 2011 -