leds

How do you connect 40 leds in a row. I need to run them on a small boat. Just looking for the best way thank you.  

Topic by tbolle   |  last reply


led

I am trying to make a led project with 2 c bat and a knife switch and it does not work the led says 2.5 volts whats wrong?

Topic by gja132   |  last reply


LED

I want to make a project using leds...except I cant figure out what to buy. Can someone help? Like the voltage and the type of led.

Topic by Batryn   |  last reply


LEDs

Where can i get LEDs?!?!?!?!?! i see all these awsome projects but i cant find LEDs. please recomend a american store or send me a link. thx!!!!!!!!!!

Topic by laxfreak 


LEDs

Where can i get LEDs?!?!?!?!?! i see all these awsome projects but i cant find LEDs. please recomend a american store or send me a link. thx!!!!!!!!!!

Topic by laxfreak   |  last reply


LEDs

Where can i get LEDs?!?!?!?!?! i see all these awsome projects but i cant find LEDs. please recomend a american store or send me a link. thx!!!!!!!!!!

Topic by laxfreak   |  last reply


LEDs

Where can i get LEDs?!?!?!?!?! i see all these awsome projects but i cant find LEDs. please recomend a american store or send me a link. thx!!!!!!!!!!

Topic by laxfreak   |  last reply


LED's

LED throwies are so populear that this happend. i serched for LED on google. Light-emitting diode - Wikipedia, the free encyclopediaA light-emitting diode (LED) /ɛl.i.ˈdiː/ [1] is a semiconductor diode that emits incoherent narrow-spectrum light when electrically biased in the forward ... en.wikipedia.org/wiki/Light-emitting_diode - 153k - Cached - Similar pages - Note this Howstuffworks "How Light Emitting Diodes Work"Light emitting diodes form the numbers on digital clocks, send data from remote controls and light up traffic signals. Find out how LEDs work. electronics.howstuffworks.com/led.htm - 62k - Cached - Similar pages - Note this SUPER BRIGHT LEDS homeOffer LED products and components including replacement bulbs and circuit boards. Includes detailed specifications and wholesale information. www.superbrightleds.com/ - 4k - Cached - Similar pages - Note this TheLEDLight.com is everything LED. Find loose LEDs, LED controls ...TheLEDLight.Com stocks a variety of low voltage (12vdc or 24vdc) LED lighting products such as under cabinet lighting, LED bulbs, LED fixtures, ... www.theledlight.com/ - 40k - Cached - Similar pages - Note this LED Circuitry tutorial: how to hook up LEDs.LED Circuitry tutorial: how to hook up LEDs. Text and illustrated instructions for setting up a circuit, what is series and parallel circuits, ... www.theledlight.com/ledcircuits.html - 15k - Cached - Similar pages - Note this LEDs Magazine - LED Technology, Solid State Lighting and other LED ...LEDs Magazine - LED Technology, Solid State Lighting and other LED Applications. www.ledsmagazine.com/ - 31k - Cached - Similar pages - Note this What is a Light Emitting Diode?What is a Light Emitting Diode Fundamentals of Physical Science Experiments by Experimentation ACEPT. acept.asu.edu/courses/phs110/expmts/exp13a.html - 8k - Cached - Similar pages - Note this LED Throwies - Instructables - DIY, How To, art, techDeveloped by the Graffiti Research Lab a division of the Eyebeam R&D OpenLab, LED Throwies are an inexpensive way to add color to any ferromagneti... www.instructables.com/id/LED-Throwies/ - 178k - Cached - Similar pages - Note this

Topic by dsman195276   |  last reply


LEDS

I am wondering if you run a led at full voltage and amps then as you add more resistance light output goes down here is my question 1 led at 20ma or 2 led at 10ma do not 2 leds give more light than 1. Like is light output a linear taper to amount of current applied or is it more of an audio taper?

Topic by John1397   |  last reply


LEDs

Can I connect 20 leds together on 110V tension so they won't fuck up in some time? If so, how?

Topic by guilerms   |  last reply


leds

Would like to wire dollhouse with led lights, going from 120v down to 12v,also be able to turn each room on and off.

Question by richard dodds   |  last reply


LEDs

Im trying to make a singe row 18 LED circuit, i used 18 random resistors that i salvaged from things (one for every led), i connected that to a 12v battery and only 4 light up, (1 out of the 4 are dim, the other 3 are good) what do i do to make all 18 light up. (the LEDs are blueish)?

Topic by Emomo   |  last reply


Leds

New to site not sure this were to post this. Led's for ac powered model railroading, to replace incandescent bulbs.  Voltage to track varies from 5 to 17 volts AC.  Leds will light up, but what is it doing to them. They do not pop like a flash bulb at top voltage. I've rectified some to dc voltage for lights in cars, the variable voltage seems to power them. Ideally a circuit that put out a constant 3.2 DC volts, with a variable 5 to 17 volt AC input.  Or maybe would a constant 3.2 volt AC out would function? I found that with HO DCC control, a white led with a 1k resistor will function, have not ran them for more than few hours though. Prewired rectified leds go for around $3.00  each, 5 passenger cars, 2 bulbs each, gets pricey with 4 sets of cars. Surly someone has gone through this.

Topic by 31cssinc   |  last reply


Replacing LEDs on a LED fan? Answered

If the LEDs are the same voltage, can i just cut the wires on the LED fan, and just simply re-solder the new LEDs onto the wires? I have been looking at several Instructables about replacing the LEDs on a fan, and they all have complicated re-wiring ideas..Can't you just simply replace the LEDs with the news ones?

Question by ramroids55   |  last reply


LED NIGHTMARE!!! (LED THROWIE)

I recently about 2 weeks ago* ordered 50 LEDs for my sister in laws wedding reception from www.modersmart.com, I was totally screwed over when i only received 28 of the LEDs i ordered, not only that but when i ordered them, there was an instock supply of 120 ! ! ! ! >_<Ok, aside from being screwed over, im in dire need of finding (10 pcs) Loose 10mm LED - White and also need (12 pcs) Loose 10mm LED - Redhttp://www.moddersmart.com/index.php?target=categories&category;_id=394if possible could someone help me in finding similar LEDs that use a 3V battery for an LED throwie??another site ive tried is http://www.hebeiltd.com.cn/?p=leds.9.10mm but the Minimum order US$99 mixed OK. and i dont need $99 in LEDs If anyone can help, id appreciate it big time!! Thanks.

Topic by les_SD_3386   |  last reply


Resisters and LEDs? Answered

I was wondering when i wire LEDs together does there have to be a resister for every LED? (i making an arc reactor with 7 LEDs)

Question by Emsaid   |  last reply


LEDs strips

who can help me, i need to make a very long LED strip, and i dont know how to do it, thnx for yor help :)

Topic by eyoung1   |  last reply


are there UV leds? Answered

Null

Question by transistor 12v   |  last reply


LED lights

My name is Cindy,  our company produce LED components and LED lights in many appication. If everybody need such products, don't hesitate to contact with me. International Business Department Lucky Light Electronics (Asia) Co., Ltd Add:6th Industrial Park,Nanlian,Longgang District,Shenzhen, China. P.C: 518116 MSN: leds14@hotmail.com Skype: luckylightled E-mail: led8@luckylight.cn Tel: +86 755 8461 3005 Fax:+86 755 8461 3126 Website: www.luckylightled.com

Topic by cindy2819   |  last reply


led to music? Answered

Ok... i have been looking into this for the past month tried to use a TIP31 transistor to make my led light strips flash to music in my car by using my sub amplifier as an audio out source...... and it would not work so i was wondering if you someone could help me out to make a box that would allow for audio in from my amplifier that would have a circuit that would perform the task of making my led light strips flash to my music. thanks. 

Question by dallyski   |  last reply


LEDs on eBay?

My brother and I recently made an eBay account, and we were just browsing through everything and we came across many LEDs. Most of the LEDs in bulk that I saw were from China or Hong Kong. I am just curious if anyone knows how reliable, safe, and if I would be getting my money's worth. I did buy some from besthongkong.com, and those came, but I am a little skeptical about these guys on eBay. Any suggestions?

Topic by Brennn10   |  last reply


transistors with leds?

New to led lights thought about using on fish tank the one post says to use resistors why is this necessary when using a transformer from alarm clock?

Question by budman95   |  last reply


LEDs on a costume?

I have never used LEDs on a costume before, my planned costume will have approximately 50 separate strands of lights on it, in two different colors.  The way the costume is designed, there is simply no place to hide 50 battery packs (20, maybe but not 50), is there a way to attach several strands of lights to one battery pack and still light up for several hours? I was planing on buying a long strip of LEDs that I could cut to length, what types of battery packs would I need to use?  Any instructions, videos or tutorials would be awesome.

Question by TishaC   |  last reply


Smiley with leds

Hi, I want to create a simple toy for children that can respond to a child's actions. I want the toy to look like a character with emotions : it can be happy, sad, etc.. I'm looking for a way to show the emotions through the 3D printed shell. I like the way the object in the picture does that. I was wondering if they use leds or lcd screen or anything else. Do you have any idea ?  Thanks Catherine

Topic by Catherine Dupont   |  last reply


LED Gloves

I was in a bar tonight and there were these guys with these weird LED gloves and were doing this little show where they wave their hands arounds and it looked really awesome. Seems pretty simple. They have 16 watch size batteries linked up to super bright LEDs. I kinda thought that was a good project to try instead of buying a pair for 100 dollars that are considered quality.  I really don't even know how to go about this.  They're called Light Show Rave Gloves. Here's a video of what they look like afterwords. http://www.youtube.com/watch?v=gwNCnMNs6ww&feature;=player_embedded

Topic by bofthe951   |  last reply


LED's on helmet

I was thinking on building a helmet like the ones that are on this video: https://www.youtube.com/watch?v=BgfcToAjfdc I can do the electronics, but I have no idea on where or how to get a helmet similar to the one on the video that has a visor large enough for an LED matrix. If anyone has any ideas, please let me know. Thanks

Topic by Aktzin   |  last reply


LEDs and resistors

I notice a lot of people tell you to always put a resistor on an LED. Should I use a resistor if my LED's forward voltage is the same as my power supply?

Topic by bomberman3   |  last reply


LED help?

i would really like some help with a project that i am working on. i am trying to make a ring of leds and am curious as to the soldering aspect. i have heard multiple responses ( never solder leds in succession, you don't need a resistor etc. ) and hope to get a straight answer with this. if someone can draw up a schematic for this i am more of a visual learner. i'll be using 8 leds in a ring form and will have them posted in a piece of plexi-glass all the same distance from each other... any answers that get me closer to my goal would be very much appreciated. P.S. i don't have a lot of space for this project it is going to be installed into a thin area ( front - back )

Question by Z0n3d0ut   |  last reply


TOYS with LED's

Hi, I recently bought one sword with LEDS and I want to know how they control the LEDS (it have different patterns of lighting). They use a PIC or IC ? I open the sword and have a very small PCB board with the IC cover with a black solid coating my questions are: The toys use and IC or PIC? What is the difference between IC or PIC's? They control also the voltage of the LED (different color of LED have different voltage)? The PIC/IC is programmed in which language? Where can I found more resources about this topic ? thank you for any help Chris SWORD http://www.rinovelty.com/index.cfm/fuseaction/products.thumbs/cat/114/page/2/filter/pricerange%7Cany%7Cany/Light_Ups_Light_Up_Swords

Topic by christoys   |  last reply


Help with LEDs

Hi, I'm new to the whole electronics thing, and i decided to try and make a sign for my brother for christmas. I was planning to back light it with 4 rows of 3 leds in each row, each row being a different color. I was planning to power it with a plug in the wall power supply that outputs 9v DC 450 mA. Also i was planning to have a switch for each row, and a potentiometer to control all the leds. The leds have about a 2.8 forward voltage @ 20mA. I was wondering if it would be possible to power the leds with this power supply, and if so, what the circuit diagram would look like with all the resistors, leds, etc.. (whatever else i need). Thanks

Topic by OpenSpace   |  last reply


Diffusing LEDs

Hi, I am currently building an LED matrix, and would ideally like to diffuse the light from the LED into maybe a square or rectangle shape(using some sort of border). What would be the best way to do this? I've tried using tracing paper, normal paper, fabric etc. to try and spread out the light, but it always seems to create the 'circle' which comes from the top point of the LED rather than spreading it out. Any help would be gratefully appreciated. Thanks :).

Topic by willww   |  last reply


LED circuit?

I recently purchased a few LEDs for a project, 2 blues and four reds. I need a way to power them all for months at a time. Would a nice soul be kind enough to draw up a schematic for me, considering I know NOTHING about this stuff? Here are the schematics, taken right off the back of the packets. 4 Red LEDs: Forward Current: 28mA max Forward Voltage 2.6 V max 2 Blue LEDs Forward (supply) Voltage: 3.7 typical, 4.5 Max Forward (supply) current: 20mA typical, 30mA max Any help?

Question by Rotten194   |  last reply


LED noOb

I built this shelving and I would like to put an LED in each section, but plug it into a wall outlet for its power source. I don't want to have to change batteries all the time. I have never done anything with lighting or LEDs. Series or parallel? I don't know anything about resistors either. I know that once I figure this out it will open the door for many other projects, but I was hoping someone would know where to start... Any good websites or books? And if anyone has any ideas or done something similar I could totally use some advice. Thanks!

Topic by thetillmiester   |  last reply


Flashing led? Answered

I know this may be basic but im still pretty new to this all. I have 4 leds that have to flash together. Would a 555 timer work? could someone link me to a diagram. I was wondering if i could make the speed change able, super fast to slow.

Question by Aaamazzara   |  last reply


LED Strip

Hello everyone! I have one question. I have 5m of 12v RGB LED strip. How i can connect them to some type of power bank? Is that even possible? I am making porch swing stand and i would like to add LED strips to it. Thank you very much!

Question by DarkM14   |  last reply


Led Help

I have a whelen white vertex led light head. Normally there is a 12 volt dc controller already attached to the light it self that controls the flash pattern which you can change. However some one cut the light head off the controller part and the controller cant be found so now i have just a light head with 3 wires red black and green red being power green and black being ground. there are a total of 6 leds 3 off the green wire and 3 off the black and a common power wire. my problem is i cannot figure out the proper voltage and ampures needed to power the lights. i have tried to ohm the leds (and yes i tried every which way with the leads) but i suppose my fluke 115 does not have the range needed for these lights. i connected a known working light and controller to 12 volts and mesured the power going to that light which read which read about 3.7 volts at .36 amps and each set of 3 leds being .18 amps and with out any leds connected i got 5.2 volts i just want to make sure this is correct before i put 5 volts and a resistor to them and they blow. ill post pics and a crappy diagram of what i think is in the light head

Question by Nnhalo360nn 


LED wireless

Hello everyone... anybody has any information about Wireless LED's ? or what is the mechanism of them ? Like The Fraunhofer LED that are wireless !!!

Topic by mojtabaw   |  last reply


LEDs in Canada

I was wondering where i can get LEDs in canada.

Topic by Alcreion   |  last reply


led matrix?

I want to build an led matrix for under 50 bucks that dose not use Arduino. is there any way to do it?

Question by knexinventer   |  last reply


undervoltage LED

If you undervoltage and LED (by like .05 volts) you don't need a resistor, right?

Topic by guyfrom7up   |  last reply


LED mau5head?

What kind of LEDs would I need to make a replica of deadmau5's LED mau5head? I already know how to make a mau5head, I just don't know what I need for a LED head and how to install the LEDs. Links would be appreciated!

Question by XEblaw   |  last reply


Free LED

Where can I find a lot of free LED lights with free or cheap, but quick shipping?

Topic by metalshiflet   |  last reply


LED Contacts

What is the best way to affix an LED contact to a watch battery without soldering it and risking damage to the battery? Help

Topic by ropor   |  last reply


SMD Led's

I have just purchased SMD LED's from China. They come on a strip. How do I remove them from the strip to use them individually?

Topic by epf321   |  last reply


LED status

Is there a way you can read the status of an LED using an arduino code? That is,to read whether an LED is high or low

Question by chikarito   |  last reply


LED basics

Found a website with a really great "LED basics" type tutorial. Hope it is helpful!http://www.kpsec.freeuk.com/components/led.htm

Topic by 8bit   |  last reply


LED Belt

Would 4x AA batteries, light up 9 LED's in Parallel?(With a resistor of course) The LED's are 3 volt. I am making an LED belt for my Friend. I wired it up and only the red LED's lit up for some reason.( The colors used are red, green, and 1 blue) is there a problem in amperage or is there a short or something?

Topic by Jordo   |  last reply


Temperature and LEDs

Is there a way to control a group of LEDs or even an RGB LED with some sort of temperature sensor/thermometer? I'm new to electronics and wanted to know if you could have a Red LED glow when something relatively hot/warm was near and have a Blue LED glow when something relatively cold/cool was near by. I'm new to electronics and was just curious

Topic by smkoberg   |  last reply


led switch

My dad is redoing his basement and he wants to have a panel of switches with leds above them.  so that when the switch is on the led above it is on to.  does anyone know how to do this?

Topic by tic tac man   |  last reply


LED CIRCUIT?

Hi would this work if i used 5 12v Leds(parallel) and connected 3 9v pp3 batteries(parallel) for power, also would the LEDS need there own resistors each? look at image for detail

Question by jbutcher05   |  last reply