High Power LEDs

I have 3 10 watt LED emitters to sell (2.9 cm x 2.0 cm x 0.3 cm) Colour temperature is about 6000K I'll ship anywhere in Australia I don't have a good quality camera right now Send me a private message and I'll see what I can do

Topic by .Unknown. 6 years ago


How to Make High Powered LED Alternate

Does anyone know or can tell me where I can get information on how to get High Powered LED's to alternate flashes like wig-wags for a vehicle??  Wondering what I need and how to wire it.  I really wanted to have about 3 or 4 high powered LEDs (either Luxon Stars or something of the sort) on one side and 3 or 4 on the other side, and each side to alternate flashes back and forth.  I need help at a beginner level and Any help is greatly appreciated. Thanks

Topic by CrazyBob62 6 years ago  |  last reply 6 years ago


Wiring high powered leds.

How can I wire 60 2.5v ,350mA and 20 3.5v ,350mA leds. The 2 different leds can have seperate power supplies? Trying to build a grow light for indoor vegatables. Thanks for any help

Question by realkoolkat 9 years ago  |  last reply 8 years ago


A high power LED with Glediator?

I know you can use ws2801 led strips with Glediator and make a 10x10 matrix, but can I use a high power LED?I'm not quite sure what I'd need to make this work, that's why I'm here lolBy high power LED i mean something like this: https://i.pinimg.com/originals/67/d6/52/67d652f3ee83d4ad87aa5fe56c887cac.jpg

Question by Delta1Dan 1 year ago  |  last reply 1 year ago


HIGH POWER LED DRIVER?

Can someone help me I am trying to make video lights using 5 Watt and 10 Watt LEDs. I need a simple circuit to use these LEDs, I will be using 12v battery as power souce.

Question by MUNIR1 9 years ago


UV high power

Don't use on your Hotel room covers, chairs or bed sheets! ...you don't want to know! UVA/UVB high power LED's and some white use UV with white phosphors so be sure to wear eye protection...

Topic by erckgillis 12 years ago  |  last reply 9 years ago


Powering LEDS with mains power.

What if you made a voltage divider with high-value  resistors, and then rectify the signal?  Is that dangerous?

Topic by flagrantfouler 8 years ago  |  last reply 8 years ago


Powering LEDS with mains power.

The idea is to use a voltage divider with high value resistors and then rectify the signal.  Is this dangerous?

Topic by flagrantfouler 8 years ago  |  last reply 8 years ago


Powering LEDs?

What I am trying to do is built a LED board that beats to music.  I have found many way to make it beat to the music, but my problem is I don't understand how to power the LEDs.  I am new to building electronics, and I am still learning.  Anyways, what my hope to do is use build a board 46in long running one LED per inch.  This will be dived up into smaller sections to run different beats off my home theater system.  I am trying to run all of this using  4 TIP31c, and I understand how to use them, I just am not sure how to power this.  Thank you!

Question by Togroovy4u 6 years ago  |  last reply 6 years ago


LED high striker?

I'm wanting to build an electronic version of the popular carnival game High Striker. I would like it to be done with LEDs as the way it displays the power of the strike. This way i can arrange them however I need to. It's going to be themed to look like lightening, so they won't be in a perfectly straight line. Thanks in advance for any input.

Question by Dustin Cox 5 years ago  |  last reply 5 years ago


how to power a 30w high power led? Answered

I order a 30w led from ebay but i dont know how to power it can i use just a 16v 2a power adapter or hove i to buy a led driver here is the led:             http://cgi.ebay.com/30W-White-High-Power-2100LM-LED-Light-Lamp-Bulb-A_W0QQitemZ220708010099QQcategoryZ163866QQcmdZViewItemQQ_trksidZp4340.m263QQ_trkparmsZalgo%3DSIC%26its%3DI%252BC%26itu%3DUCI%252BIA%252BUA%252BFICS%252BUFI%26otn%3D10%26pmod%3D220693236934%26ps%3D63%26clkid%3D5621333683761900258

Question by Andrew_48 8 years ago  |  last reply 8 years ago


100 watt LEDs

Hi there I am wanting to drive 5 100 watt Cool white LEDs at half power total of 250 watts. Each LED spec is 32-34 volts DC @ 3.5 amps. Ideally I would like to drive from one power supply. or 2 at most, any advice would be welcome. please email me at tn21@live.co.uk

Topic by JohnT10 4 years ago  |  last reply 4 years ago


Battery powered arduino + high power leds?

I'm desperately trying to design an arduino circuit that can power each color of a high power cree MC-E color RGB led. What is the smallest dimension rechargeable battery I can use to accomplish this and have it run for a few hours? I'm desperate!

Question by SpiffyChee 8 years ago  |  last reply 8 years ago


how to power a 30w high power led? Answered

i am making a diy homemade projector and i want to know how to power a 30w led without a driver becouse the driver cost 30$ and i want to make the projector as cheap as posible so if anyone know a way to power a 30w led without a driver please help me the led ......http://cgi.ebay.com/30W-White-High-Power-2100LM-LED-Light-Lamp-Bulb-A_W0QQitemZ220708010099QQcategoryZ163866QQcmdZViewItemQQ_trksidZp4340.m263QQ_trkparmsZalgo%3DSIC%26its%3DI%252BC%26itu%3DUCI%252BIA%252BUA%252BFICS%252BUFI%26otn%3D10%26pmod%3D220693236934%26ps%3D63%26clkid%3D5621333683761900258

Question by Andrew_48 8 years ago  |  last reply 8 years ago


High power LED brand recommendations?

I have an idea for an Arduino-controlled LED floor lamp and am interested in subjective information about the different brands of high power LEDs--pros and cons, the color and quality of the light, availability of heatsinks, mounting brackets, drivers, durability, price and so on.  Sparkfun sells Luxeon so it's tempting to just go with that, but I don't want to just go with that and find out something else was better.  I don't have a definite design yet just in the daydream stages, I want to be able to dim and brighten, turn individual LEDs on and off, be able to adjust the quality of light from warm to cool, I'm thinking white as a basis plus some RGB LEDs or other color leds to tweak the color, but the white light will do the heavy lifting, probably with some opaque white plastic or glass to mix and diffuse the light from all of the LEDs.  I found a few articles, but they're a few years old, or not exactly relevant (e.g. comparison of flashlights using these LEDs). www.lighthound.com/Fenix-Cree-Luxeon-Rebel-LED-Flashlight-Comparison-Chart_ep_53-1.html www.candlepowerforums.com/vb/showthread.php?221524-cree-vs-luxeon ledflashlights.blogspot.com/2011/06/cree-versus-luxeon.html ledsreview.com/articles/209/

Topic by cdslashetc 6 years ago  |  last reply 6 years ago


are high power ir leds dangerous? Answered

Im experimenting with ir motion sensors and im think i have a working model, but then i realized i would have a ir led on at almost 150 ma and i didn't know if that was safe, so i managed to reduce it to 10 ma and still work, but then i realized that if i didn't know how dangerous ir leds are, then any level could be unsafe for all i know (i came to that realization after i changed the circuit because im smart like that) i couldn't find any safety info on ir leds, just ir lasers, is there a certain power to distance ratio or anything i should know? aside from not shining it directly into my eyes (im not that far-gone)

Question by the judge 9 years ago  |  last reply 9 years ago


High Power CREE LED circuit

I am trying to make two different circuits- one to operate 3 CREE XR red LEDS and 2 CREE XRE Blue LEDs. Can anyone point me in the right direction to solve this problem?? Thanks! Matty

Topic by walmatt23 10 years ago  |  last reply 7 years ago


High Power RGB Led Project

I will be doing my first high power RGB Led project soon based on these leds: http://www.ebay.com/itm/380364867527?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649#ht_2814wt_1163 I will be using it in my boat utilizing this RGB controller: https://www.instructables.com/id/LED-Rainbow-RGB-LED-PWM-Controller-Construction-/ I will be using the project in my boat and thus tied to 12v dc battery power bus.  The RGB specs call for: DC Forward Voltage (VF):Red 7.5V;Green 10V ~ 12V;Blue 10V ~ 12V @ 350ma per channel. My question is 'What is the best way to get the voltage down to the 7.5v required for Red'?  As I am in a boat with a single 12v battery, I would like to be as efficient as possible.  I plan to use 4-6 of these leds.  Since each requires 12vish on the highest channel, I am planning to put them in parallel. Thanks in advance!

Question by BigSicilian 7 years ago  |  last reply 7 years ago


High power LED flashlight power supply questions Answered

I'm currently in the process of building a high power LED flashlight from scratch. I've decided to go for AA batteries as a source of power, however, I am not sure as to whether 2 AAs will be enough to drive my LEDs. The LEDs are from a 5W LED bulb putting out ~360lm. I'm assuming the bulb itself has 5 1W LEDs connected in some sort of configuration, but I'm going to run them in parallel. I'm planning on running it on either Alkaline or NiMH. However, I'm not quite sure if there will be some sort of voltage drop with the load I'm going to place on the system (~1A @ 200mA each). Also, 2 NiMH will only have a combined voltage of 2.4v making me a bit skeptical as to whether it would even run. I already have a design for the flashlight for 2 AA batteries. Adding a third battery would complicate the design though, maybe requiring me to make a battery pack or something. So, will a 5x1W LED array in parallel run from a 2.4v NiMH power supply? Or do I have to go with 3 batteries plus a current limiting resistor?

Question by beehard44 5 years ago  |  last reply 5 years ago


Best driver for this led? Answered

Sorry for posting a repeated question(i think) Well, i'm so new to high power LEDs, My dad bought a high power LED on ebay http://www.ebay.com/itm/160584479457?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649  The LED has the following specifications  Working Forward Voltage (VF) : 9-12V DC Working Forward Current (IF) :1000mA   Intensity Luminous: 800Lm The seller told me to use a  DC DC converter for it. I will not pay $20 for one.  I've seen lots of sites about the driver but most of them has circuit made for  LEDs which have a forward voltage of 2.8-3.6V. and mine has a Forward Voltage of 12V. So what will be the best driver for it. I found this one but i'm wondering if this would work http://www.simple-electronics.com/2011/09/high-current-led-driver-using-fet.html

Question by ARJOON 7 years ago  |  last reply 6 years ago


Some basic Power LED question for building a simple LED board Answered

This question is coming from a total rookie in the field of electronics, please keep that in mind :) I need to build a simple multi-LED board, but I lack some essential knowledge about electronics. The LEDs I need to use are 5W IR High Power LEDs: DC Forward Voltage (VF): 1.4V DC Forward Current (IF): 1400mA Maximum Pulse Voltage: 1.7V Maximum Pulse Current: 2000mA I would like to build on the board three pieces of this LED, with a momentary switch. And I just realised I will probably need some kind of "driver" circuit - whatever it is - to use the Power LEDs. I'd rather buy one from eBay, than make myself one :) Just need to know what type I need. The input voltage is a 12V DC battery. So long story short: could someone help me out with this simple LED board? How many "mAh" should the battery have  to power these three power LEDs for about 1,5 - 2 hours? I am aware of a 5W probably need some cooling, I will use a heatsink. If someone could draw me a circuit for this project I would be amazed :)

Question by arraxis 7 years ago  |  last reply 7 years ago


high power LED matrix; is it possible and how?

I've been getting into arduino lately and recently discovered the LED matrix.  I also saw some high power LEDs controlled by arduino using transistors to handle the power.  I wondered if the same idea could be applied to a matrix.  It seemed relatively simple, but when I built the circuit in a simulator (everycircuit- an excellent app), I quickly realized some issues with it.  The attached picture is the circuit in the simulator.  You should get an idea of the flaws of the circuit.  I know it would be pretty simple to use relays instead of transistors, but does anyone have any ideas on how to do it with transistors?  NPN or PNP or both.  I can't figure it out how to do it, but I figured that the collective mind of the brilliant members of instructables could probably manage to come up with something.

Topic by dudes 4 years ago  |  last reply 4 years ago


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 5 years ago  |  last reply 4 years ago


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 6 years ago  |  last reply 6 years ago


LED Power consumption ?

I'm building a solar powered lighting for a farm, what will be the power consumption for a 10 white led.

Topic by yousaf65 9 years ago  |  last reply 9 years ago


LED power indicator?

Just wondering how to to wire up a LED to show when a project is powered. Eg. push button switch doesn't show on/off.

Question by SWIRLYTHINGALERT! 9 years ago  |  last reply 3 years ago


LED power supply?

I need some insight on powering 2 separate circuits. Here's what I have so far...... Circuit #1.   80 3.3v  leds consuming 400MA. Circuit #2.   20 2.0v leds consuming 60MA. Now my power supply output is 15v - 600ma, will this power supply suffice wired parallel? I do have a 9v-1a power supply too that could power circuit #2 if need be. but for simplicity of things i would like to use one power supply.

Question by ARGMISTER 6 years ago  |  last reply 6 years ago


LED in parallel to power? Answered

I have a project and i am wondering if you can hook up a diode to the power source (hook it up in parallel to it) would you have to hook it to ground in some way??

Question by astroboy907 8 years ago  |  last reply 8 years ago


LED Power supply?

I have approx 200 flashing LED circut boards that I want to make a twinkling display from. Each board has a single LED that flashes about every second, each board also has a single 3v cr2032 lithium battery powering it. What Id like to do is remove the battery on each one and wire them to a DC power supply that can be plugged into 120VAC. So I actually have two questions: Should I wire these in series? Or parallel? What size power supply would I need? Heres a link to a picture of what I have. http://www.rocketproduction.com/wirefree-leds.php Thanks (in advance) for all your help!

Question by McBeeRob 6 years ago  |  last reply 6 years ago


led powering question

I am building a garduino since planting season is coming near and this would be a great to start me seedlings off in. right now I have 3 banks of three red leds rated at 1.8v and in one of he instructible they said 7v was sufficient but i am connecting a 9v and can only power 2 leds and also I would like to go with an ac-dc converter but everyone i found has at least 800+ mA can someone point me toward a good power supply at the end I am looking at about 25 red and 8 blue LEDs

Topic by redwind 8 years ago  |  last reply 8 years ago


magnet powered LED

Ok i remember seeing something, or maby its just a thought in the back of my head. but is there a way to make a led light up when you move a magnet by it or something like that?

Topic by yuckzee 10 years ago  |  last reply 10 years ago


Power LED Help

I'm looking to make some home lighting with LEDs, but I'm not sure how to regulate the current properly. I've really only used resistors up until now for led projects. I have a couple ATX pc power supplies, and I've used it to power an ebay led with no problems. I just touched the led directly to the 3.3v line and ground and it lit up fine. What I'm wondering is, is does the psu automatically adjust the current to what you need? Or is there something else I would need to worry about? (I figured it would be okay to power something off the 3.3V line if they were 3.7V leds, say several P4s)

Topic by opliko 9 years ago  |  last reply 9 years ago


Power for 12 LED? Answered

I want to make something and decorated with LED lighting for my girlfriend's birthday present. I will need to light up 12 LED, which has typical forward voltage around 3.5V, and I wonder what is minimum number of batteries (AA/AAA) I need to use and will still give a reasonable brightness please? Can it be less than 3 batteries? As it doesn't really make sense to have a lot of batteries in a small present. Thank you very much 

Question by luckyvictor 8 years ago  |  last reply 8 years ago


Powering an LED strip? Answered

Hi, I am looking to use a small LED strip on my bicycle. Something like the product below. I have no experience with LED strips, and am looking for a way to power them. I want something small & light to mount somewhere on my bike, and wondered what the best options would be? Would a 12V battery pack be suitable (see below). How long would this last roughly? Thanks! Dan LED: http://www.ebay.co.uk/itm/2x-6LED-Eagle-eye-Super-Bright-White-Flexible-Car-Daytime-Running-Light/151040285688?_trksid=p2047675.m2109&_trkparms=aid%3D555003%26algo%3DPW.CAT%26ao%3D2%26asc%3D29%26meid%3D1853554389978170290%26pid%3D100010%26prg%3D1013%26rk%3D2%26rkt%3D15%26sd%3D271286250637%26 Battery pack: http://www.ultraleds.co.uk/12v-1-25a-15w-mini-power-supply-ac-dc.html

Question by skatmandu2002 5 years ago  |  last reply 5 years ago


Led powered by 9v

Hi all. I am new to this forum and need some help. I want to mount an led strip to the bottom of a roller skate. Everything I find already made up requires 12v. I need to keep the setup as small as possible for mounting reasons. How could I go about making a 12vdc led circuit work off a 9v battery or how could I wire up some led's on a flexible strip powered by a battery. I am thinking 9v because I can purchase a rechargeable set without draining the bank account each time. Any suggestions are welcomed. I have about 6" in length to mount the strip to. I would like multi color led but one solid color would also be fine. Thanks again for any suggestions.

Topic by rsfaze 11 years ago  |  last reply 11 years ago


power IR LED ? Answered

How can I power 30 IR leds comes from TV remote by a 3.6volt cell phone battery. the LEDs are 1.5 volt.

Question by asifarifin 5 years ago  |  last reply 3 years ago


LED powered party

So me and some friends a month ago got together and threw a party together last minute. Well it was more then just a hit, people turned around and begged us for more. So now that we have cred for this "epic" party which really was just random shit tossed together in a house in an hours time. So this time around we are going to go all out and spend our budget fully. But my job is to do his house like my room: I only have LEDs for lights. But the LEDs I used for my room I bought at radio shack and thus paid top dollar for them. Which was fine, for my room, but a house? I need bulk. Bulk LEDs, bulk resistors, bulk wire. But that's only half the problem, I was told my deadline was the 23rd. Well even with this short time frame I still need some good bulk dealers. Does anyone have any good links to places that sell LEDs in bulk? I'm looking to spend around 50 bucks or so on the lights. As I do this project though I will either make an inscrutable out of it or the very least a slide show!*

Topic by Vicious 10 years ago  |  last reply 10 years ago


Power Supply and LEDs

Just wondering what i could do with my old computer power supply? THANKS.... Also...What bout LEDs ....what can i make with them??? THANKS

Topic by Shadown92 11 years ago  |  last reply 11 years ago


Power 2 LED's

Basically I want to power these 2 LED's from mains power for an Instructable, i have no idea where to start, please describe in laymans terms, any help greatly appreciated cheers

Topic by abitdifferent 7 years ago  |  last reply 7 years ago


SOLAR POWERED LED

 I am trying to design a project for homeless people.  I need to attach an inexpensive solar panel to a bag.  The panel would somehow connect to a (cheap) battery, storing energy to power a waterproof LED for use in the dark.  Is this possible?  I have seen waterproof LEDs here.  But how about the solar power to battery to LED part?  I am electrically-challenged, so make this easy, okay?  Thanks a million.

Question by Laughing Whitefish 9 years ago  |  last reply 6 years ago


power supply for LED's? Answered

I have a strip of LED's that have a warning that's says use only with a 12v class 2 power supply. Is this referring to an AC/DC transformer? Should I be able to run them straight from a 12v battery? If I am using a 12v battery is the class 2 circuitry still needed?

Question by MDheliMech 5 years ago  |  last reply 5 years ago


Led Power Supply?

 I am going mad over trying to figure out what power supply I need. I am making an arduino controlled aquarium fixture and plan on using 30x3w leds. From what I understand using resistors could cause fire and I don't want that of course. I like the look of laptop drivers like this one http://www.gapsupply.com/LED-Power-Supply-p/12v-dc-nwp-96w.htm but I cant figure out which one I need. I have seen all the instructables for this and everyone seems to tape 8 meanwell drivers together. I dont want a big bulky ugly mess like that just one power supply to do the job. The smaller and more compact the better. I will be running 2 rows of white on the outside and one row of red in the middle. 10x3w leds per row. each row individually dimmable via ir and tft. here is the led specs. Whites: http://www.ebay.com/itm/390908787444?_trksid=p2059210.m2749.l2649&ssPageName;=STRK%3AMEBIDX%3AIT Forward Voltage: 3.2-3.8V-700MA Luminous flux: 200-230LM Output power: 3w Light Color:  White 6000-6500K View angle: 120-140 LED support:Copper Life time:50000 hours Reds: http://www.ebay.com/itm/310834616296?_trksid=p2059210.m2749.l2649&var;=610229587957&ssPageName;=STRK%3AMEBIDX%3AIT DC Forward Voltage:2.2V~2.8V Forward Current: 600-700mA Output power: 3w Light Color:  White 6000-6500K View angle: 120-140 Any help and ideas is greatly appreciated. Thanks

Question by charles.terhune 4 years ago


LED powering and switches

I am trying to build a small display box that has 2 LEDs (either 3mm or 5mm). One LED lights the displayed item from above, the other from below.  I plan to use only 1 LED at a time, so I presume I need an SPDT-Center off micro rocker switch.  I have a small model and it provides ample light with 2 CR2032 batteries, however, I'd like to be able to use an AC/DC adapter in place of the batteries. I need help figuring out what parts I need so I don't create anything dangerous. I am confused by the terminology used for the switch...how many amps/volts would I need? Am I correct that I would need a 6v adapter? Can the adapter be wired directly to a battery holder, or can it be SAFELY wired directly to the switch/LEDs? I want to order some stuff, but I don't know what I need! If anyone can provide this info, I would be grateful! Thank you.

Topic by craigo 7 years ago


Reefer meets High Power LEDs (looking for help)

Well this is my second post and I am a bit more learned in the ways of LED circuits from many of your posts.Objective: Create a high light output LED array that will peak at around 16,000K for growing coral for reef aquariums.Primary strategy: connect 10 or more Luxeon III stars in seriesPreferred requirements: Energy efficient, Low Heat emittance, Needs to peak out at the appropriate spectrum for the coral ( I have that covered just by changing the ratio of cool whites to royal blue Luxeon III's)At the moment I a just going for a simple on/off, later i would like to employ a form of automated dimming so that it fades on and off so there is not such a sharp on off with the LED's. So far I have a circuit that i plan on modeling my LED array after since it was readily available for me to dissect. The following is an LED array. I know that there is a diode rectifier bridge built in there and a smoothing capasitor but there are to components i do not recognize they are connected at the positive and negative ends of the circuit. One is the Yellow (doohickey with part # 684j 250) component attached to the positive lead and the other is a clear (fuse/resistor hybrid) component next to the resistor on the board.https://www.instructables.com/files/deriv/FGX/D7E2/FBQ33XYA/FGXD7E2FBQ33XYA.MEDIUM.jpghttps://www.instructables.com/files/deriv/FGX/D7E2/FBQ33XYA/FGXD7E2FBQ33XYA.MEDIUM.jpgI was able to draw the circuit and it seems pretty straight forward but I just need to know if I will be able to spec the appropriate components to operate 10 leds in series (Each LED operates with a Vf=3.9 V and I= 1000mA ) they will need a supply of more then 40V DC.Any help or dialogue I can get the more the better and the more I will learnIn addition I looked at Dan's high power constant current but not sure how well it would operate under the conditions that I have specifiedPrimary LED's in use for the Reef light: (note all are stars)LED part # Color Type Vf Amps LuxLXHL-LW3C cool white Lambertian 3.9 1000mA 80lumensLXHL-LR3C Royal blue Lambertian 3.9 1000mA 445mWLumensLXHL-MW1D cool white " " 3.42 350 mA 45 LumensLXHL-MRRD Royal Blue "" "" 3.42 350 mA 220 mWLumensThere was little to no difference between the 700 mA series and the 1000mA series so I did not list themI look forward to all your helpTom

Topic by Aquatope 11 years ago


Driver for High Powered 3W, 5W LEDs

Hey folks,I am new to this LED thing.I've bought around 90 high powered 3W and 5W LEDs with different forward voltages, and I am going to power them using some LED drivers that I bought with them. After searching for a while about how the nature of LEDs are, I am not sure about how should I connect these drivers to the LEDs because the drivers are constant current type of 1500mA, and the required amperage of LEDs are 700mA. I am thinking of adding one resistor to reduce 1500ma to 700ma just after + output in the series of LEDs line, but then because the drivers are a constant current one I think the resistor might just not work as the driver may try to push the current to reach to 1500mA so then it may ruin the resistor and LEDs afterward. Well, this is my guess and I am not so sure about that, so I need help with this one. Here I bought 5pcs of the 50W type:https://www.ebay.ca/itm/162156429886Above link is the drivers that I mistakenly bought from ebay (I could buy the 700mA drivers and make my life easy, but there is no high wattage (above 100W) with low amperage (700mA) LED driver in the market for a reasonable price for an unknown reason to me, could anyone answer this too?) Also my another question is about the nature of LED drivers: Let's say there is a LED driver with a constact current of 700mA and output voltage of 30-45V and some LEDs with forward voltage of 3.7V and 700mA required current, what happens if I connect 4 LEDs to this driver? Does it ruin the LEDs for getting more voltage than required? Or it's gonna be fine because the current is constantly 700mA? I am so confused right now! Please help!I also bought some temperature switches so I could add it to my circuit so I save my LEDs in case they got so hot! Yet I am not sure where to add them! If anyone could advise me on this I really appreciate it!

Topic by gamma-rays 1 year ago  |  last reply 11 months ago


Need pre wired high power leds

I am in need of a pre wired High Power Led board. Something like a Cree XR-E Q2 Emitter. I would like to find a supplier that I could buy pre built/ wired boards (plug and play) to install in a small lighting package. Ideally I would like to find a pre built light that I could incorporate into my project. I need a high output 12v white light, that I can make a reverse light out of. I am hoping to market the product so a supplier over a retail option would be best. Any help you could give would be greatly appreciated Thanks in advance  

Topic by returnforservice 8 years ago


using a thermoelectric cooler for High powered LEDs

Has anyone tried using a thermoelectric cooler, like this one http://www.allelectronics.com/cgi-bin/category.cgi?item=PJT-7to cool down a high powered LED star. I am considering mounting one on the back of a new Luxeon RebelI plan on ramping the current up to max (1 amp) on the led, and run the Thermoelectric cooler (TEC) as high as possible off a lead-acid battery. Strap a giant heat sink on it (maybe a fan too) plus thermal and silicone over the whole thing. It wouldn't be pretty, but it would be a neat experiment on how many lumens you could crank out of one of these things. Any inputs, suggestions, Ideas? Feel free to make an instructale on this if you want, I can't guarantee I will do it anytime soon.

Topic by John Culbertson 11 years ago  |  last reply 7 years ago


Where to get and what is the ideal high powered LED to make a projection screen with a dvd player?

I have the dvd player already. I have seen some high powered LEDs people have used and I just wasn't sure what one to get or where to get it.

Question by jeoncs 10 years ago  |  last reply 10 years ago


High Powered LED Lighting - Interfacing LED Driver with Microcontroller

Hello. I am pretty new to electronics but have slowly been getting my head around everything. I was hoping that someone may be able to give me some advice regarding circuit design. I am planning on constructing a high powered LED lighting system for my new marine aquarium. The high end LED units are still really expensive and so I thought I would construct my own for a lot cheaper. I understand the need for LED drivers to power these types of LEDs. But what I want to be able to do is control the brightness of the LEDs using a microcontroller to emulate sunrise/midday/sunset and of course moon light. But I am uncertain how you go about interfacing a LED driver to a microcontroller. Does anyone know of any useful tutorials or have any advice on how I go about completing this task? Thanks in advance, Steve

Topic by steven847 5 years ago  |  last reply 5 years ago


High Current Power Supply

For a project totally nonrelated to my tesla coil I need a way of regulating a voltage down to 36 Volts at 8 amps. My transformer (or a bunch of transformers hooked together) is suppose to have an output of about 38 volts at 8 amps, yet the voltage (with no load) is actually around 60 volts... Basically I need a way of regulating this voltage. For saftey, lets say the max input is 70 volts and it should be able to handle 10 Amps. The output voltage should be 36.

Topic by guyfrom7up 10 years ago  |  last reply 10 years ago