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 throwies are so populear that this happend. i serched for LED on google. Light-emitting diode - Wikipedia, the free encyclopediaA light-emitting diode (LED) /Él.i.ËdiË/  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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
How should I drive an LED from a 38 volts power supply? The led wizard says I need a 1800 ohm, 2 watt resistor, but it also says' it'll disipate excessive heat. I recently took apart a surge protector and found that they drive an LED from a 120volt source by having a diode, LED and what appears to be either a 1 or 2 watt resistor. I need help driving an LED from a 38 volts power supply just as an indicator.
Topic by guyfrom7up | last reply
Why don't they make LEDs without the reflectors? I find that LEDs don't throw their light very far (it spreads out quickly) and even if you were to put them in a torch, the majority of the light would go out of the torch and spread then, making the reflector quite useless.
Question by .Unknown. | last reply
I have a small pile of salvaged LEDs from various burned up electronics (flashlights, old stereos, etc) and I am wondering if there is any way to figure out what the voltage requirements are for the led. if anyone has an idea how to find this out it would be of great help.
Topic by danlab | last reply
I need some sort of LED "clip". i need to make a long string of LEDs where i can change the individual LEDs easily. i need designs for both normal and 4-pin RGB LED's i was thinking something along the lines of the clips in breadboards. it doesn't have to be movable. i might need to have some sort of "doubleclip", so i can change the resistors for individual LEDs any ideas on how to make something like this? or where i can buy some?
Question by solidacid | last reply
I want to weave a rag rug, and include LED's in the rug. Ideally, I would like to weave the wiring and LED's into the rug so that they are concealed in the rug- and not removable. But most people like rag rugs because they are machine washable. If I were to soak a LED wired rug in soapy water, rinse by hand and only use the machine to spin the excess water out, then line dry the rug, would the LED's still work, or does water destroy them and the connections? Thank you for sharing your expertise!
Question by msthimble | last reply
Quick question, really. Anyone know if it's possible to run LEDs in series straight off of wall current? For instance, lets say I have 60 2v LEDs connected in series. Could I just put 120 VAC into them (with the proper resistor of course) and they'd light up with no problem?
Question by tylervitale | last reply