Lighting?

I need to find a way to light 20 paper lanterns hung from a gymnasium ceiling. I need to accomplish this without having 20 cords hanging down. I'm a novice. This is for my daughters wedding.

Question by knocky70   |  last reply


Can light collide with light? Answered

If two electromagnetic waves intersect, what happens? Is light 'immaterial' or without density, is light weightless? The photograph below is not related to this question in any way.

Question by nepheron   |  last reply


What is this light? Answered

Can this be done with lasers?   http://www.dailymail.co.uk/news/worldnews/article-1234430/Mystery-spiral-blue-light-display-hovers-Norway.html >

Question by Joseph McCarthy   |  last reply


Led light

I'm struggling understanding what im really needing and could use some guidance... I'm tring to build a underwater fishing light that has 36 3watt green leds.  I'm going to only be powering them when the engine is off and the batteries aren't being charges... it will run off a standard 12volt marine battery... the led specs are ' green (510-530nm):DC Forward Voltage:3.4V~3.8V Forward Current: 700mA'.  what would be the best way to power these leds... im assuming that I need to power in series groups of 3. but with such a wide voltage of 3.4 to 3.8... do I just shoot for the middle? do I use 12v in my calculation or do u use like a 12.5 or 13 like it sometimes checks.... Can I get by powering it with just resistors or do I need a led driver? I have entered my data in some of the calculaters online and it says I need a 2.2 resister but gives warnings... and doesn't say what watt resistor... does it matter... first project ... confussed to say the least thanks

Topic by laltec   |  last reply


Led lights

Hello everyone, i have a question and i think people here on instructables are best suited to help me! So i wanted to connect 21 leds together to make a bigger light. I would connect them in parallel and in series (3 in series 7 rows :P) and i thought i would use a 12v 7Ah battery to power this thing. The problem is i also wanted to use an arduino so they would turn on automatically but it can not output 12v. So is it beter to use the arduino to phisiclly controll a switch to turn the leds on or is it possible to power the arduino and then output 5v to the leds. And if it is will they be dimmer? or will the system draw more current killing my battery faster? Thats my problem and i hope someone here can help me. Thank you in advance.

Topic by thecreatorst   |  last reply


Light Strips? Answered

Instructibles had a contest a while back involving some kind of light up tube thing that wasn't led.  I don't remember what it was though, anybody remember it?

Question by jj.inc   |  last reply


light bulb

Hi, i got a problem with the power supply of a light that i found in an old car. it is a 6V 55W  light, the thing is that i want to make it work with a battery made of several cellphone bateries but i don´t know really whats the  voltage and current that my recicled battery must have in order to turn on the light and survive. thanks for reading, and i hope  anyone can help me.

Topic by kvalero 


Rope Light?

I have a rope light that runs on a battery pack that holds 2 AA batteries. I want to use these lights to outline my grill on my truck. Is there a way to hook this up to the 12V electric system of the truck so I dont have to use batteries all the time?

Question by JeromyR   |  last reply


speed of light?

I want to know the derivation of relative velocity formula used by Albert Einstein to prove that nothing can exceed the speed of light. Is there any simple derivation? please help

Question by deepakmurali   |  last reply


Solar light?

I want to build and install three lights about 10 watt each in my house garden. Powered by solar panel (80w),100ah dry battery. Instead of using energy saver bulbs , i want to use LEDs.one LED of 10w or more which give light equal to one LED. Can any gentleman help me to design this system with 8 hours battery backup. The lights should be turned at dawn.Thanks

Question by Sarfraz ahmad   |  last reply


Circuitry for lighting

Hey all, I have never really done much circuitry to this date, but I was hoping to make a fairly complex lamp that may require a good dose of it. What I'm looking to do is wire four cold cathode tubes (12V, the kind that are used to light computers), as well as two LED lights with arduino based flicker control, and run them off of a wall socket? The pictures are a (very) rough sketch of the setup, as well as a supply list. Is there any way someone could explain what this might require to me in baby terms? All the best, Adrian

Topic by am_rawr   |  last reply


LED light

Hello! First of all I want to say hi to everyone as this is my first post! I hope to learn some interesting things from all of you.  On the topic now. I want to make a USB LED night light for my sister. I wanted to make it USB powered with RGB (or whatever they are called. I'm not too familiar whit all this stuff) LEDs that you can control in computer. Is something like that possible without expensive controllers and what not? Every answer will be appreciated.  Thank you!

Topic by slaps123   |  last reply


Musical Lights

Hey, I recently saw http://www.youtube.com/watch?v=Yd3hzYAJzOo&w; and i want to make that. I read the schematic at http://www.uploderx.net/dphrag/SCHEMATIC1___PAGE1444.jpg (that link doesn't work, use this one: http://www.buildlounge.com/wp-content/uploads/2011/10/xy88F.jpg  for it, but, I'm still quite confused. The parts that are the most problematic to me are the high, low, and mid pass filters. i  don't understand what they are, and how there made. If anyone could help me, thank you.

Topic by schumi23   |  last reply


Light Cannons Answered

Hey-o,so heres the deal, im a remixer and im designing props for my future shows and thought how cool would it be to have 'Gaster Blasters' fly up on drones when i get to my Megalovania remix?for those of you who do not know what I am talking about Gaster Blasters are a weapon of sans from the popular game Undertale. they look like monster skulls and shoot lasers out of their mouths while im not trying to make lasers, i am trying to create a beam of light :) i plan on atttaching this device to a drone or perhaps just using a omnidimensional wire system to supend it.Any suggestions would be greatly appreciated! thanks~NoPawse Queen of Remixes Prince of Snailcheck me out on youtube, Twitter, and Soundcloudand dont forget to make requests using the links! I make them for FREE!~

Question by NoPawse123   |  last reply


mini light?

In order to make a mini flashlight, do I need a toggle switch or will it work if hooked up correctly with out?  I ask because I hooked mine up correctly with out a toggle switch and it does not work, I have a high brightness 3mm led and it only get a short 2 second amber orage glow charge before going out.  please help. matt 

Question by hollywood4l 


leds.strip lights?

22 inch long strip surrounding an exhaust tip.want  an led every inch.my main prob is i dont know how physically big is an led.5 mm?3mm?dime? pencil eraser?that odd looking mole on my....,well you know. how big are the darn things?also,do i put a resistor every 2 or 3 bulbs according to volts and ohms and such or one really badass resistor at the begining.next ,the resistor drops voltage for the following leds in line.if the led in front is getting proper watts or voltage,then the one after that is getting less and so on,isnt it?i dont know help? 

Question by frankentrike   |  last reply



How many led lights can I power with 5v 2000mAh power bank?

I'm a guy who tries everything. Not an engineer or electrician but I would like to make a DIY camera light using LED strip and one or 2 5V powerbanks. Please advice on how to go about it.

Question by ShingaiG   |  last reply


what can we do with ballasts and starters?

I have ballasts and starters of an old flourescent bulb for i was able make it work after i used circuits from busted CFL's now is there some way we use this in another purpose

Question by jovenhatsjr   |  last reply


can a outdoor lighting be converted to led lighting?

I have a low voltage outdoor lighting and its not bright enough i want to convert it to use leds can it be done

Question by dvdpr   |  last reply


LED Light Strips to light Art Booth?

I would like to create lighting for my art booth using LED lighting strips. I have already worked with these and really like them, but never in the size I would need to light my booth. Everything I have done, was powered but 8 AA batteries. Example of a lite booth, with conventional track lighting. http://jwallacephoto.com/blog/wp-content/uploads/2008/08/2008-04-booth-paseo.jpg My idea is to light my 10x10 booth with 3 10' lengths of aluminum angle iron http://assets.overclock.net.s3.amazonaws.com/9/91/913173c2_vbattach89423.jpeg and put two 10' strips on each of the 2 inner surfaces (inside the L shape). So I would have a total of 60' of LED strips. I need to illuminate 3 of the 4 walls. My first question, would this be too bright? If so, would a single row on each piece of angle iron do the job? Second question is connecting it together and powering it. My only option is to run it off batteries, because not all events have easy access to power and the ones that do, charge a hefty fee. I need something light weight to carry, I don't want to go with a car battery, but feel with this many lights, I might have to. Considering they need to be run for at least 8 hours. But, I really want each 10' section to be self powered and contained. So that I can hang it from inside the tent and not have to run wires all over the place to power the 3 sections. In a perfect world, each one would self powered with a single battery box attached to it at one end and at the other would be a short wires to connect the top and bottom strip inside the V grove to make it all one piece. Making it a 20' length in one 10' section. Anyways, it's late and I think I am starting to ramble. Any help is greatly appreciated.

Question by TheU 


Christmas lights question? Answered

Is there anyway to set up 2 strands of christmas lights so that when one is on the other is off and then they switch every couple of seconds.?

Question by kevman0044   |  last reply


What is Light's solution?

I saw Light's solution in a chemical supply magazine, but I have no idea as to what it is or what it's used for. I've googled it and wikipedia'd it, but I found nothing.

Question by mad_scientist   |  last reply


Led Christmas Lights

I have an idea but have no idea if it would even work. I would like to make a led string that can be two different colors. The idea is that I put the lights up in October and they are purple and orange for Halloween and then as Christmas approaches I can change them to green and white. That way I can put lights up one time and do it when it is still warm out and my neighbors wont think I'm nuts. I know I can weave two lines together and just switch plugs but that isn't complicated enough. I like to do things that are way more complicated than it needs to be but are really cool when they are done. my wife loves it.

Topic by brianv512   |  last reply


staircase handrail lighting

Hi. not sure this is the right category but here goes. i want to build a staircase handrail (interior) that has LEDs underneath it, pointing towards the stairs, and i want them to light up automatically when someone touches the handrail. a nice variant would be that individual lights light up following my hand position on the rail (following you up or down the stairs) and an even nicer variant to that would be to have the other lights fade as you move. is this possible? and is it possible WITHOUT mild user electrocution? :D i have no trouble building it, just not sure about the electrical part... please share thoughts or ideas on how to make this! thanks!

Topic by mart!   |  last reply


Lights Responding to Music

Hey Guys, I know there are a couple hacks that show how you can make a single LED or even a couple react to music (the bass makes them bright...) but I cannot find a way to make a string of lights react to music.  I want a longer string of lights to be able to do this so I can put them around a table, does anyone have a solution? Thanks

Topic by silverslik1   |  last reply


LED wall lighting?

I want to create a long wire tht i can just pin onto my wall with LEDs along that piece of wire. and just plug it directly into my wall but i have NO idea how to do implement this idea. im a comp sci student and i know nothing about electricity, helpppp

Topic by unix   |  last reply


XML Controlled Lights

I am looking to build a 3 light "stop light" setup that could be controlled by XML. ..  something like the below.  Where whichever of the 3 fields has the "Y" that is which light would be lit up.  It can be desktop sized, but any help would be appreciated!! Y N N

Topic by SKNDSTRY   |  last reply


LED street lighting

Hi guys,  I'm thinking about making some LED street lights. Is this a feasible idea? Can anybody do an instructable on this topic please. 

Topic by Jeevendra   |  last reply


USB Light Switch

I have a spare light switch and I want to convert it to play a song when I flip the switch. How could I do that?

Topic by wisconsinrules88   |  last reply


freezing and lighting kerosene?

What happens when you freeze kerosene and light it with a match will it blow or nothins

Question by Robinson ruiz   |  last reply


Light Sensor identification?

Hello all, I've just started a project and found a spare light sensor in a Megabrite LED Color Changing Night Light. However I am a complete novice and do not know how I use this specific light sensor. So here's the question: Are all light sensors the same? Can i just use any lightsensor 'ible or do I need specifics for this sensor? And if so, does anyone know how I can figure out what the light sensor is? Thanks for any help.

Question by Renagade   |  last reply


LED Light Box

Normally, a light box uses fluorescent lamps (e.g. 36 watts Philips Lamp) and electronic ballasts to emit light. However, it consumes too much electricty and the life of lamps is short. Therefore, I would like to replace fluorescent lamps with LEDs.

Question by richardkartono   |  last reply


emergency lighting system

We're planning to do an emergency lighting system and we want to add some twist on it. What do you think should we add? (it's like making it also charger or such) Plsss, help us. :)

Topic by imatrianidar   |  last reply


Stop light cycler

Hello. I have an old Stop light in my game room.  I would like to have a switch that will cycle the lights: R, Y, G, R, Y, G....etc. I would also like it to dim the lights and have a setting to pick one light at a time.  I have see cyclers but they are about $100.  Can I build one for cheaper?  The cycling feature is the most desireable.  I can dim separately and do without the hold feature if I have too.  thanks for looking.  Aaron

Question by aaron81006   |  last reply


LED accent lighting

I want to add LED accent lighting to the mirrors in my bathroom renovation. I installed receptacles behind each mirror Can I power a short LED light strip with a USB charging block plugged into a 120v receptacle?

Question by MONROEJOE   |  last reply


Led strobe light?

Hello everyone, I came across a video on youtube where I found a light on a truck but don't know what it is called maybe strobe but I am not sure about this.  My ideas would be to use an IC 555 or use arduino to control the lights to achieve the same effects that the light is on the top of the red truck cabin. Here is the link for the video. https://www.youtube.com/watch?v=ujbOLHGrqXs Start at 11:41 till 11:55 and you will see the light on top of the red truck. Thanks all

Question by Chamburn   |  last reply


Restore night light? Answered

Is there something I can do to make night lights like this work again?  The package always says 'lasts a lifetime', but somehow mine always die after just a few years. This has happened with several different brands.

Question by mole1   |  last reply


Montior to light Box

Hi everyone, Im after some help im trying to turn an old monitor which wasn't working (wasn't powering up) into a light box for art work, but im not sure what to do in terms of powering it. Ive still got the PCB but the one which send the power to the monitor (lights) has a connector that's broke off. Can anyone help? Cheers

Topic by drop_dead_fred   |  last reply


attiny13v light sensor?

I need some help. i need to get a schematic & program for a attiny13v that will turn on a light when something passes over a light sensor, and then turn off if something passes over it again. has anyone done this before, or can it be done? just to let you know, i have done almost nothing with microcontrollers before. thanks for your help!

Question by matstermind   |  last reply


Momentary flashing lights

What is the easiest/simplest method of making a flashing light (preferably a small string of LED's or a piece of EL tape) connected to a momentary push switch? no timer or any other complication just lights that will flash on and off until the button is released. i want to make a flashing indicator light and switch small enough to mount on a ring that i can wear on my pointing finger so that the button hits the back of my hand as i straighten my finger to point and the light flashes only until i curl my finger to release the switch.

Topic by ambientvoid   |  last reply


Moon light timer

I would like to build a led light that switches on and off with the moon. On when the moon rises and off when the moon sets. Would also like no leds on at new moon and an additional led comes on until full moon is reached. The process then reverses an an led goes off until new moon with no leds on. I would also love the light output to be 4150k the colour of moon light and about 1 lumen at 1metre distance.

Topic by Ausie Steam   |  last reply


Light field camera

Came across this interesting camera that fuses the images from multiple lenses. https://light.co/camera  I suppose it is a "light field camera" as described here https://en.wikipedia.org/wiki/Light-field_camera Any suggestions on possible solutions, or links to similar projects? Prefferable that uses lenses from disposed of smartphones. 

Topic by mskogly   |  last reply


Lighting to USB pinout

Hello forums! I am having an issue and I desperately need help. It's easy enough to find a USB to lighting connector with the breakout already done for you on the PCB, but I can't for the life of me find the actually 9 to 4 pin diagram for conversion. Can any help me????

Topic by jfrost11   |  last reply


making a IR Light

Im planning to build a IR light using 10 IR leds in parallel with a forward voltage of 1.2 and a forward current of 100mA and five 6.8 Ohms resistors. Will 2 AA batteries be enough for this Thanks

Topic by specializedrider   |  last reply


LED's for puck lights

Hi. I purchased some leds for my puck lights but when I install all 3 they just flash but won't stay on. If I leave 1 standard bulb in with 2 leds then the arrangement works. Does any one know what is going on and is there a fix for it such as a resistor [ which I don't have alot of knowledge on] please help. Thanks in advance

Topic by fdeck   |  last reply


parallel light bulbs? Answered

Is there any way of connecting multiple fluorescent light bulbs *THIS* to 1 power plug....i'm a newb, so if this is pretty complicated, i'm gonna need some articles :) the reason i ask this is because i'm thinking about constructing a (full room) black light in it's own sweet casing. it would go around my whole room around the perimeter (around the upper edge, touching the ceiling) so ya...i have enough construction knowledge to build the casing and everything else, BUT i do not know hardly anything about electrical stuff...which is why i have you guys :) so ya...any help (or different solutions other than light bulbs) would be greatly appreciated. thanks :)

Question by miqt   |  last reply


Wireless LED light?

I would like to make an LED light that can be controlled by some form of wireless on/off switch. I cannot use IR as the switch will be in a different room to the light. I think I could use the Imp board I have seen on here but that seems expensive as I think I would need 2 Arduinos, 2 Imp shields and 2 Imps. Maybe I could use Bluetooth, Xbee or RF? Any thoughts? Cheers. Phil

Question by filthyPhil   |  last reply


led light art

These are some of the pictures I took when inspired by the light wand Instructable. i used long exposur photography on my little PowerShot A570 IS camera. I'd love to see what some other people have done too. Tell me what you think and show me some of yours as well.

Topic by flamethrower1010   |  last reply


Book light switch?

Hi. I have a shelf, directly attached to the wall with a light switch at the back (see attached diagram). I'd like to use a tilting-out book as an on/off switch a la cliche mystery secret-room-door-opener. Any ideas for how to do this? Oh...just found this example: http://www.vespoe.com/blightdesign/shop/secret-passageway-switch Thanks!

Topic by samhandwich   |  last reply