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


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

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


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


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


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


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 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


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


Star led?

I want to replace my indoor  recess lighting with some 1W White HIGH POWER LED Star 100LM 140°light is it possible to do so  

Question by dvdpr   |  last reply


LED supplyers

This is a list of supplyers of LEDs posted by members of this groupphenoptix.co.ukBest Hongkongif you know of any others feel free to post them and i'll add em to the list

Topic by Ward_Nox   |  last reply


LEDs in Canada

I was wondering where i can get LEDs in canada.

Topic by Alcreion   |  last reply


led values Answered

All i want is a list of led voltage and current values, you would think this a simple task,not so.They are few and far between and when you do find some they all contradict.

Question by johnm56   |  last reply


LED Characters

This is something I saw at toxel.com http://www.toxel.com/tech/2009/05/05/recycled-typography-lamps

Topic by pratikashwekar   |  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


LED question

I just bought some LED's that i plan to run through a wire on a 9 volt with a push button on/off i plan to run 6 at a time. the green are 525nm 8000mcd and the blue (A SEPARATE SET) are 472nm 2500mcd

Topic by pbpenguin5   |  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 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


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 cube

Dear Sir, We are a marketing company in Saudi Arabia . We are interested in buying a customized LED cube for a project that we are handling now. The LED has to be one meter in length and one meter in depth and 2.5 meters in height. Please let us know if it is possible to build it and give us a quotation on that. Regards, Amal Alsayegh Marketing and PR rep. Zone Arabia amal@arabiczonesa.com

Question by AmalZone   |  last reply


LED SCANNER?

Does anyone have any informational sites and or plans to wire up leds to scan back and forth like on the knight rider car?

Topic by autoflow   |  last reply


Diffused LED

Hello, I am working on a lighting project. Right now I have a typical yellow LED (like so http://www.sparkfun.com/products/532) mounted in a 5" tube. It is shining through a frosted acrylic sheet at the end of the tube, 2" away from the LED. it creates a circle of intense light on the acrylic that is about 3" in diameter and then some ambient light around it. Are there any LEDs that are designed to diffuse light more so that the circle of intense light would widen and be a bit less bright? Thanks, Ben

Topic by BHSilverman   |  last reply


LED cube

Dear Sir, We are a marketing company in Saudi Arabia . We are interested in buying a customized LED cube for a project that we are handling now. The LED has to be one meter in length and one meter in depth and 2.5 meters in height. Please let us know if it is possible to build it and give us a quotation on that. Regards, Amal Alsayegh Marketing and PR rep. Zone Arabia amal@arabiczonesa.com

Topic by AmalZone   |  last reply


Led Matrix

I want to make a simple led matrix out of some leds and a 5.6V phone charger, just for it to light up, no animations or any particular control to it, just a simple matrix with an on/off switch.  A link to some instructions? Much appreciated, and is there also some instructions out there to turn a basic light bulb socket to power leds?

Topic by crossraod   |  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


Led help

I need help, i want to make a sign with 50 maby 60 Led's where can i go? i am a total beginner at this. thanks

Topic by timberman   |  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 advice

I'm trying to source some LEDs, preferably from a supplier in the UK I'm going to mount them on a power kite, so they need to be bright as possible, ideally with a wide viewing angle and low forward voltage - to keep the weight of power supply down. Also, I'm considering options of mounting LEDs in clusters or using a small diffuser (like a ping pong ball, but smaller) to achieve a 360deg viewing angle. Any suggested products or ingenious solutions would be welcome

Question by davidhw 


blinking LEDs

I'm planning a sort of a Halloween Scavenger hunt. I'm planning to hide boxes along a wooded trail, each with a blinking red LED on top, which is what seekers would look for. I suppose that this is a super-simple question, but I've got no real experience in electronics. But I do work well with instructions. I would like to do about ten of these, so I would appreciate any advice on how to cheaply create a bunch of blinking LED beacons. THANKS!!!!

Topic by Purple Chez   |  last reply


LED driver.

i want to make a LED light source, I have found a few on other places, but not sure of those. I have a 9v battery, 4LEDS.  If anyone would be so kind, I have two set ups I am considering. One will have a 555timer, to make the LEDS "pulse"    The other is just direct connect battery to LED i am aware a resisitor or several are needed for this direct arrainagement, so my question for this setup is how to make the most of it. a third option is to incorporate the two above.  *did find an instructable which used a wall plug as the driver, with some modification of course. thanks in advance.

Topic by mossDboss   |  last reply


led and resistorsa

With L.E.D's, are there any specific resistors i should use or would a 150ohm one be find and not give the resistor to much power and die?>

Topic by craig3   |  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


LED Diffusion

I am using a flexible LED strip to illuminate some leaves on a lotus leaf for our art car. The leaves are made out of bent tubing which is then covered in fabric. The issue I am having is getting the light diffused across the surface. These photos show the issue and in actuality it's not as bad as the photo make it look. I'm wondering what tricks people have for getting diffusion. I have use backlight film in the past when having a panel of LEDs but this strip follows the contour of my shape. Any thoughts? Cheers. Phil

Topic by filthyPhil   |  last reply


LED Fixtures

I need instructions on how to construct an LED system with remotely located 1 watt fixtures with the furthest fixture being 50' from the power source I'll need to drive at least 10 of the 1 watt bulbs. Thanks for any help 

Topic by zappenfusen   |  last reply


LED Resistors

I`ve been searching around everywhere about Resistors and how to use them, I understand that they resist power to the LED light t to a safe limit, but I need a noobs guide on how to use them, can someone help me?

Topic by Alcreion   |  last reply


working with leds

HELLO i AM WORKING ON A PROJECT IN WHICH i HAVE TO LIGHT TwO SETS OF LEDS. One set of led is white ultra bright led and other set is normal 5mm led red & green. I need a circuit for the lamp which should switch on the white led for like 1hour and after that this white led gets dimm and other led (red & green) wil bright slowly. In the circuit the time for glowing white led can be adjustable with timer. After making this circuit ,I will connect it with timer so that I can adjust  the 1hours time and then it gets dimm. Please help me out in this circuit .I am searching from last one week but I couldnt find. Thanks in advance

Question by SanjaySingh   |  last reply


led on a shirt

I want to write my dj name on a shirt with led's. What would i need for something like this. I would like the name to flash or turn on one letter at a time. Or even maybe sound activated. Do i need programming skills thanks

Topic by crayc   |  last reply


led light

Need to know how many amp power supply to get for my 12v 225 red/blue led panel.It has 5 parallel circuits like the picture below  with 15 series circuits  each with 2 red and 1 blue led 12 volt supply with a 5.1 ohm resistor (rough drawing but i think it shows the circuit..leds are faceing the wrong way but ya get the point thanks don't mind the arrows i didn't know how to remove them

Topic by bolonny 


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 Programming

Ok so...I want to program led lights to flash in secquence. See the attached image. I'm not good at programming and don't know much about microcontrollers...So...What microcontroler do I use...how do I program it? Sorry for the noob questions but i need help!

Topic by Joe426   |  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


LEDs in Sponge...

I would like to make THIS (link out to deviantart) But I don't understand her tutorial at ALL, given I have no knowledge of how LEDs work. If someone could post an Instructable or direct me to one similar, with great step-by-step instructions, I would be SO grateful! Thanks!

Topic by Demarion   |  last reply