LED advice

So, i'm a pretty avid fan of our local roller derby team (HKRG BABY!), and i belong to a group of super fans who focus on doing a lot of weird crafting and costuming and other such insantiy for the bouts. so, i'm wanting to make some pretty fancy signs for next year's derby season that will  light up. i've got some plans to use some EL wire/tape and the accompanying equipment but i've also got some other sign plans that would probably be cheaper/easier to make using LEDs instead. so, basic premise is to have a sign that would be able to light up some cut out letters separately and sequentially. i know how to make the sign itself so that's not the issue, what i need is a method to cheaply and easily make the letters light up in sequence. so it's a 3 letter sequence (let's use D O A as an example) that progresses at the normal speed that you would imagine a large group of people chanting a 3 letter call sign to go. so the D would lights up for a second or two, one-two second pause, O lights up for a second or two, one or two second pause, then the A for a second or two, lather rinse repeat. i'm imagining that each group of LEDs for each letter would be wired in series, then each group would be wired to whatever circuit would be needed to make the lights cycle. i'm not sure exactly how many leds will be needed per letter, but maybe between 10-20 of them per segment? i'm going to have several of these types of signs (all 3 syllable chants) so i'd like it to be something that's easy to repeat and not terribly expensive (i'm a derby nut, but there is a line where cost kind of gets stupid)

Topic by crapflinger   |  last reply


Led to battery pack?

Hi, I just bought a led (5mm) Infared and a battery pack but when i try to test the led it dont work? either i am doing it wrong or something i dont know lol....

Topic by JustinM4   |  last reply


LED Wiring question

Forgive me for kind of double-posting this, but I didn't get much response before. I put up a question regarding LED wiring here: https://www.instructables.com/answers/New-to-LED-wiring-could-someone-help-me-make-sure/Could I get someone to help me out? Again, if double posting like this is wrong, feel free to remove this thread. I don't want to cause problems, I just want someone who's smarter than me to help out :)Thanks!

Topic by bFusion   |  last reply


Spread LED light?

I'm having trouble using an LED to light up a vase. I have frosted a vase and was hoping to get a blue led to light it up from putting it in the bottom of the vase and give it a sort of blue glow, however, it is just not working. I can still see a big concentration of light where the LED is and towards the top of a small vase (maybe 8 inches?), there isn't much light. Is there a particular LED feature I should be looking at? Certain type? Certain voltage? etc? I was hoping the sunjar tutorial would shed some light (no pun intended) but it really didn't help much for my project. I was trying to get an effect similar to:http://www.westcoastmall.net/images/GS68.jpg or maybe http://www.vibride.com/images/photoalbum/38/ostrichfeather.jpgany ideas?

Topic by ejkeebler   |  last reply


LED Sea Urchins

These glowing sea urchin shells that the folks at Evil Mad Scientist Laboratories put together look pretty sweet and are really easy to make. It all boils down to this: LED throwie + sea urchin shell = glowing sea thing! Simple and effective. Nice. Quick project: LED-lit sea urchins

Topic by fungus amungus   |  last reply


What type of LEDs are used for grow LED lights?

I've been googleing about the advantage of LED grow lights and how it saves energy and how they last longer. After looking to buy them I realized they were very expensive. However, I also found a few do-it-yourself guides which I thought were pretty neat and straight forward. The only thing I didn't see was if the LEDs they used were special or just any red/blue led lights can be used. Hope to get an answer and save a few bucks but most importantly save energy, Thanks in advance !!

Question by monchito7   |  last reply


DIY LED Growlights from LED Xmas bulb strings

I just got an Aerogarden for Xmas and it is a pretty neat little unit, but it has some annoying and expensive problems. The biggest one is that it uses CF bulbs that are on 16 hours a day, and they say that you need to replace the bulbs every 6 months, because the spectrum of the bulbs change as they age, making the plants grow less well. I did some research and found that the Weed industry has created a solution: LED arrays with a combination of red and blue LEDs (the color frequencies plants thrive on). These arrays are very long lived and use less than 1/2 the power of the CF bulbs in the Aerogarden. The problem is that even the cheap ones (200 LEDs) are $50, and you would need 2 for complete coverage in the Aerogarden. Then I had a brainstorm! LED Xmas Lights. They are already wired, ready to mount on a panel, and you can get Red and Blue strings of 100 on ebay for about $10 incl shipping. I don't know if they are the right Red and Blue, but it is an interesting experiment. Even if it does not work, you are set for Xmas lights for next year.

Topic by macrumpton   |  last reply


"Blinking Eyes" LED circuit. ?

A timer circuit that'll turn LEDs on and off in an approximation of eyes blinking. Ooooon-off-on-off-oooooon-off-oooooon. So, this coming Halloween, I've got a dozen or twenty of these timers, running pairs of red LEDs, about eye-width apart, that are poked through a piece of cardboard spray painted flat black and set in shadowed areas around the porch. Maybe a couple of sets of them covered with ping-pong ball halves to make the "eyes" bigger.

Question by allen   |  last reply


LED Light Box Help!

Hey, I am very new to crafting things using LED's and stuff, but I want to get in to it, and have set myself a project as I need a lightbox for drawing/tracing for work. I want to make a A3 (29mm7 × 420 mm) sized box, with the aim to keep it as slim as possible. So I know that I need to use LED's because they are small and bright, I have been looking at white ones. I also know that I need some sort of frosted perspex to diffuse the light and keep the coverage of light even. That is important. A switch is necessary too of course! However I know nothing about what I need to connect the LED's together and how I am to power this. I would prefer to power this with power, but don't know how viable this is with LED's. I would just like a bit of advice of what I actually need then I will probably be able to figure the rest out!  Oh also if could keep the cost under £40 that would be perfect because if it was more, I might aswell just buy one from the shop! Cheers! Will 

Topic by Will172 


Good LED Lights for Terrariums?

I'd like to buy cheaply or make a LED light for a terrarium cover, I'd like for it to be something good for the plants, but since the whole thing is supposed to be a display piece, the red/blue plant-lights aren't really going to cut it, I want it to be visually close to white light. (If that means some 'wasted' light in the green part of the spectrum, then so be it.)   Any suggestions? Some white LEDs seem to at least roughly cover the needed spectrum, if in the wrong proportions, but I'm not sure if that'll do it for me. I'd appreciate advice from anyone who's done a project like this.  Thanks!

Question by VRAndy   |  last reply


What Happens to an LED when it is overvolted? Answered

I would just like to know what happens when an LED is overvolted, and whether flickering is a a sign of overvolting. The LED used was a Super Bright White LED connected directly to a 3.6v CR123A Battery.

Question by CheeLee   |  last reply


Halloween blinking eyes LED project

A pair of red LEDs which blink in an approximation of the glowing red eyes of some baleful critter lurking in the shadows behind me as I hand out candy to the kids. I figure to poke the LEDs through a piece of cardboard sprayed with flat black paint. Half a dozen sets of light would make for a pretty scary pack of, well, something. Just the thing for Halloween. I don't have the technical background to do this but it seems like it might be fun and cheap.

Topic by allen   |  last reply


LED lighting capable of reef aquariums?

Using 5m 420nm to 680nm blue and red LED getting enough "light" past 18 inches of water to allow live rock and coral growth. How many LED's are needed? Has anyone else done it? Ridiculous is the price as soon as you put the word hydroponics or aquarium on a item. Like some help building one 36"x 12" that would pentrate 18" of water at what 3000 lumens? Pars? Buying "supplies" here in Kanada is another use of that "R" word.

Question by peninbrant   |  last reply


How to make an LED sign box

Waaay cheaper than having someone do it for you.  The sign in the video is massive but the LED light strips used can fit any size box or sign of any shape.  It's not hard at all and the end result will will make you smile every time you turn it on!

Topic by maxsbl   |  last reply



do i need to use a LED driver or just a wall wort?

I want to make a LED room light, should i get LED drivers or would i be ok with some wall worts of the appropriate power.

Question by JZ Price   |  last reply


How many white leds(super bright white leds) would I need to produce the same brightness as a 60w, 240V spotlight bulb.

I have a standard lamp that uses two separate 60w, 240v filament spotlight bulbs. What I want to do is convert it to using white leds or super bright white leds- one led disc to replace a bulb. What i need to know is: how many leds of this sort I would need to use on one led disk to produce the same amount of light as one of the above bulbs.

Question by mdog93   |  last reply


First U.S City To Be Lit With 100% LEDs

"Ann Arbor is on its way to being the first U.S. city to light up its downtown with 100% LED-based streetlights. The city expects to install more than 1,000 LED streetlights beginning next month. The city anticipates a 3.8-year payback on its initial investment."Read More...Kudos to you, Ann Arbor!

Topic by Weissensteinburg   |  last reply


glass desk piece led mod help

I found a small eagle scout glass desk piece with a black base. I'm gonna buy one and put small LED lights and a battery in the base.  I need a little help with what to do with the circuit. I have some 18650, 18650 holders, copper wire, and some down time. Should I go straight for 3.6/3.7v 18650, or should I use standard 1.5v cells? I want to do purple (my school color). Would it look better to use UV instead of regular purple? Where should I buy a bunch of little led? Online or in store? If I want to sand a pattern on the sides of the glass cube, what's the best way to go about doing that?

Topic by leaf26   |  last reply


Best LED color to mimic incandescent lighting

Dan, Since you seem to be the wizard with LED's around here I figured I would pose this question to you. So I am creating some paper lamps and I'm looking to power them with ultra bright low power LED's, My goal is to make them green laps with the option to use a battery pack with a solar cell. So with that in mind what do you think would be the best selection of LED's for me, I was looking at the Luxeon Star LED's, but was wondering what color I should go with if I want that incandescent look, I was also thinking of creating a single rgb rig to control the color of the lighting for each lamp, your input will help me decide. Thanks in advance, Joshua AM

Topic by JoshuaAM   |  last reply


Katy Perry shows off LED dress

Illuminated clothing has popped up several times here on Instructables. There's the turn signal jacket, EL wire, and Fire Skirt just to name a few. Now the lit up look is getting even more attention with Katy Perry sporting an LED-lit dress made by CuteCircuit. I wonder who will turn up in some bright outfit next? Katy Perry rocks a CuteCircuit (‘wearable technology’) LED dress

Topic by fungus amungus   |  last reply


how do i get a multicolor led to change colors.?

I bought a new multi color led but i cant get it to change colors all at once

Question by gamefreak0723   |  last reply


Pedal Power LED lit night soccer

My school entered into a "pedal power video" competition, the challenge was to make a video showing how to use alternative sources of energy, so my school had a soccer game at night where we lit the field up using pedal power and generators. This was done by attaching a belt to the back wheel of a bike and hooking it up to a treadmill motor working in reverse for power. Enjoy!

Topic by iosman123   |  last reply


Pedal Power LED lit night soccer!

Hello,My school entered into a "pedal power video" competition, the challenge was to make a video showing how to use alternative sources of energy, so my school had a soccer game at night where we lit the field up using pedal power and generators. This was done by attaching a belt to the back wheel of a bike and hooking it up to a treadmill motor working in reverse for power. Enjoy!thanksiosman

Topic by iosman123   |  last reply


How to make Line powered LED strip lights? Answered

I want to make Line powered(250 volts) 35 or more LED strip lights so that i can replace all my flourescent lights in my house.

Question by hemanthpanchal   |  last reply


Gravity Lamp, the LED lamp powered by gravity

A Virginia Tech student designed an LED lamp that is powered by gravity. It is called the Gravia, and it took second place at the Greener Gadgets competition in NYC. Gravity as a renewable energy source? Amazing!From http://pesn.com/2008/02/19/9500471_Gravity_Lamp/Concept illustrations of Gravia depict an acrylic column a little over four feet high. The entire column glows when activated. The electricity is generated by the slow fall of a mass that spins a rotor. The resulting energy powers 10 high-output LEDs that fire into the acrylic lens, creating a diffuse light. The operation is silent and the housing is elegant and cord free – completely independent of electrical infrastructure.The light output will be 600-800 lumens – roughly equal to a 40 watt incandescent bulb. Each drop of the gravity mechanism runs the light over a period of four hours.To "turn on" the lamp, the user moves weights from the bottom to the top of the lamp. An hour-glass like mechanism is turned over and the weights are placed in the mass sled near the top of the lamp. The sled begins its gently glide back down and, within a few seconds, the LEDs come on and light the lamp, Moulton said. “It’s more complicated than flipping a switch but can be an acceptable, even enjoyable routine, like winding a beautiful clock or making good coffee,” he said.Moulton estimates that Gravia’s mechanisms will last more than 200 years, if used eight hours a day, 365 days a year.The winner of the Greener Gadgets competition was the Enerjar.

Topic by Brennn10   |  last reply


Pedal Power LED lit night soccer!

My school entered into a "pedal power video" competition, the challenge was to make a video showing how to use alternative sources of energy, so my school had a soccer game at night where we lit the field up using pedal power and generators. This was done by attaching a belt to the back wheel of a bike and hooking it up to a treadmill motor working in reverse for power. Enjoy!

Topic by astrozombies138   |  last reply


I want to control LED bright/dim with push buttons. Can help?

Want to dim/ bright LED with two push buttons. PIC 12F675 and 16F628A will helpful to me. Thanks

Question by ashwal   |  last reply


Can you power an LED diode using headphone wiring?

If I were to cut up a pair of headphones for the wiring, would I be able to us them to power an LED diode and connecting one end of the chopped off wiring to the LED and the other to a 9V battery. Would it work? 

Question by ViktorS16   |  last reply


Black & Decker 18 LED Area Light Question? Answered

I have a Black & Decker 18 LED Area Light, it needs six "AA" batteries can i just use a 9v battery?

Question by cheating-master   |  last reply


The solution to the enegy crisis

The answer to all of you energy problems!https://www.instructables.com/id/Get-the-LED-out-Glass-Filled-LED-Lightbulb/No shame!

Topic by LinuxH4x0r   |  last reply


How to illuminate a wall-clock with leds and a light sensor ?

I want to illuminate a wall-clock using a light sensor and leds from a 1.5\3.0\9.0 volt batteries.What components i need for a long lasting but simple circuit ?

Question by arikkru   |  last reply


Is there any way to convert 110 volts ac to 12 volts dc for a high powere led?

I know led's are 12 volt dc but i'm wondering if there would be a small circut that would reduce the voltage and turn to dc also what would be better for a led light bulb one high powered led or a few smaller ones

Question by maxpower49   |  last reply



Do aquarium fish like cold or warm LED light best?

I am making an aquiarium (from an old tv, to be specific), and I wonder if the fish like warm or cold LED light best. The light will be their 'daylight'.

Question by Stanaboy   |  last reply


Are LEDS used in GROW LED LAMPS any different from regular, colored LEDs?

I've seen grow LED lamps for plants and flowers go for $100 to $200 on ebay and they look like simple red and blue LEDs in a lamp unit. These days anyone can do a lamp with LEDs since we have a wide variety of LEDs, drivers and casings at our disposal and at a very affordable price. Even if you add the cost of research and develpment and a healthy profit to remain in business into the cost of the device, I don't think the ratio cost-price of those lamps is fair. Those grow lamps seem to be a scam to me, unless the LEDs/drivers used on them are really more expensive than the widely available in the market. I am more inclined to think they priced their lamps artificially to cater to its intended market: deep-pocket obsessed gardeners, weed grow-op guys, fancy growers, etc. Why is that these lamps are that costly? What is the magic behind them or do they have "NASA" technology on them or what? Thanks for your input

Question by arirang777   |  last reply



What LEDS do I need to make a "Grow Light" for growing plants and vegetables indoors? 110V & 12V. Thanks! Answered

Indoor Grow Light for plants and hydroponic gardening.  I need both 110Volt and 12 Volt schematics for out off grid home. My LED knowledge is very limited so I need the specs on the LEDS.

Question by GrumpyOldGoat   |  last reply


what is the best way to mount Led strips to the underside of a car? if they didnt come with brackets?

I Brought LED strips off of ebay to put on the underside of my car but they didnt come with brackets to put them on, where or what sort of brackets should i get to put them on?

Question by bjtaylor   |  last reply


New LED lightbulbs shine light in all directions

GE is going to be releasing a new LED lightbulb early next year that shines light in all directions, like a normal bulb, instead of one direction like they do now. The bulb will use 9 watts and shine as much light as a 40-watt incandescent. It will also last for 17 years. The drawback is the cost, which will be $40-$50, but it does provide an efficient lighting option for those who don't like the light from CFLs. No word about the blades on the side, however. GE Unveils New Omnidirection LED Bulb That Will Last 17 Years

Topic by fungus amungus   |  last reply


How to stop a 220V LED , flashing in "OFF" mode ?

I bought a new 220V 50Hz night lamp. It works nicely, execpt that in few places in my house,  when the switch is in OFF mode, the LED is FLASING (!!!) at a rate of every 6 to 10 seconds How can I stop this flashing ? In fact, I can not leave the lamp connected to power. I must plug off the cable from the power when I do not need the light. Please help Regards. Hava.

Question by hava123   |  last reply


Single LED, single battery module for inserting in a small wood sculpture?

I'd like to find a source for a self-contained LED unit with battery and switch for inserting into a carved (turned, actually) mushroom. An AAA battery would almost be too large but would be ok for lack of anything else. Something cheap, with a pushbutton switch on the bottom, that would fit in the stem of the mushroom. Any leads would be appreciated, thanks!

Topic by kenearlg   |  last reply


LED 'screen' that will toggle between two images for cheap? Answered

I'm looking to make a prop soon that is basically a backpack with a small screen on it. Said screen alters between two states: green with a smiley face, or red with a rather angry looking face. I am looking to make it so I can alter said screen between the two states, for as cheap as possible. My first thought was to have three pieces of plexi: one with the smile, one with the angry face, and one blank, putting the blank one in the middle. Then, light the edges of the other two with the corresponding colors. However, I don't know how well that would work, or if there is a better option.  Thanks in advance! 

Question by DoctorWoo   |  last reply


setting default mode or light pattern on commercial rope lights?

I have purchased a commercial LED rope light which has about 8 selectable light pattern by pressing a tack switch in series.  Problem is everytime the rope light is unplugged then switched back on it always defaults to the first pattern.  Is there an easy way of setting a default patter other than the first light pattern?

Question by jojitf   |  last reply


Arduino Sms

Hello,  I'm completely new to Arduino and wondering if anyone could help me.  i'm doing an art piece on communications and interactions around the world.  Each person will have there own led light.  Whenever people contact me from around the world eva text or call (preferably through wifi), I want they're light to flash for a few seconds.  No idea what parts I need and how to achieve this.  Hope this makes sense to anyone and have any advice for me? 

Topic by CiaranM8 


Is there a way to make a whole heap of lightbars in sequence, so you can run lots of a single, powerful supply?

I love QuackMaster Dan's Instructable, but would ideally want to run about a dozen of these around a dance studio - could it be done with a single power supply?

Question by    |  last reply


Anybody Iis knows how to do amood rgb lamp thermo-controlled?

I want to do a light lamp, and configure it to change color with the temperature of the room with smooth transitions. We can setup it to light in blue with 18ºC or less, orange with between 19ºC and 22ºC, and red with 25ºC and more for example. Thanks

Question by Niord   |  last reply


What's the best way to dress up LED Throwies?

I'm interested in decorating my house with LED Throwies, but I can't think of a way to hide the battery/magnet assembly.  Does anyone have any (preferably cheap) ideas on how to add any sort of elegance to the body of Throwies without sacrificing the magnetic quality?

Question by SJBarag   |  last reply


Any suggestions for improvement for this LED Wind Chimes? FEEDBACK!

Hello guys! Here is an LED Glass Bottle Chime that I had put up on Instructables. Do you have any improvements for the model? any ideas? I would love to here what you think of it, do have a look! If you like it please give it a vote, in the glass contest to show your support : ) Here's the link : https://www.instructables.com/id/LED-Glass-Bottle-Chimes/ Share and follow me! Cheers!

Topic by Craftcorner 


LED THROWIES - can AG 13 batteries be used?

Thowie instructions say 3 volt CR2032 batteries - I was told AG 13 would work.  We are using throwies made with soft white LED 's to put in white paper lanterns for a wedding.  We want to "light" the lanterns the day before, so need them to burn well for at least 36 hours.  Any suggestions or help is appreciated!

Question by juspla   |  last reply