12v 10w Led Driver
as the datasheet said the input and output voltage diff must be approx 2-3volt, i think its waste energy. same goes for the 6.5A output from the source, my parallel config is only 4.2A (6x700mA), what happen to the other 2.3A?
I think, people buy the expensive constant current LED drivers, I have been running these 24x7 for a couple years with no problems.
nice tut. Just accept that and change it accordingly when you make your own plans.
Yup, low value resistor+lots of current = lots of power (heat) loss.
Which one should I use?????
Great aritcle in any case!!!!!!!!!!Forgot to mention the specs of the led's.
forward voltage: 2.9v-3.3v
forward current: 750 mA
hope that helps.I'm building a bike light or also you could connect it to PWM (the simple PWM could make with 555 ic, but it could only give you 1A current with 4-15V input0... a Heatsink for the LM317 (you don't need one as big as mine, I just took one i had laying around). A switched diode / capacitor combination would work quite well.
this circuit is a nonsense.
using a high power resistor is a proof of very poor efficiency !. http://www.instructables.com/id/10W-LED-driver-and-dimmer/
12v 10w Led Driver
Switching is the way to go. The constant current source has a drop voltage of 3 V, so the supply voltage should always be 3 V higher than the LED voltage and can be up to 37V And good prices on the most efficient 3W Cree LEDs too.
To put it another way, usign a $4 driver and $6 LED, you would have over triple the light output using
Thanks.Hi there, wonderful guide. How can I do that with my Arduino? i used resistor before and it works good my led light in bar are working for how many years before light is fading. 10 Watt Led Driver Circuit Diagram a LM317 Regulator.
Make sure the FET is a logic level type FET so you can switch it on/off correctly with Arduino voltages. High Power Led Driver Circuit Diagram oder when cou can help me to tell how i can do it then i made an tut and add inspired by then your nick ,greetz from germany
I have a question a Heatsink for the LM317 (you don't need one as ... 2 Step 2: How It WorksThe LM317 regulator gives out a constant voltage of 1,25 volts between ADJ and Vout, https://forum.allaboutcircuits.com/threads/building-a-driver-for-12v-10w-led.58924/ Or should I rather use the PQ12RD21 because of the 4th Pin?
The closest E12 value is 1,8 ohms, the output will be 694mAthe resistor must be at least 1W in both calculations.Although the LM317 is rated for 1,5 Ampere, I wouldn't recommend 5w Led Driver Circuit Diagram I was told that the other constant current drivers is more efficient because they waste very little power, using the LM317 in my config will waste over 1W of power. in matter of cost efficiency 1 mosfet, 1 npn transistor and 1 limitting resistor would be great. Remember using heatsinks for your regulators and of course LEDs.It is extremely inefficient, among the least efficient ways possible to drive an LED.
There is no point to doing it this way.
High Power Led Driver Circuit Diagram
Also, to add to my question, how efficient is your design?Your setup looks fine to me. http://www.elcircuit.com/2016/10/simple-10w-high-power-led-driver-circuit.html i need to drive a typical 5W power LED at maximum efficiency as a strobe.
Regards and Thanks.
i made it, the wire melted, it's overheatWhere would I hook up the pot meter 12v 10w Led Driver a Resistor (see next step). 10w Led Driver Circuit Diagram 230v Collection Intro Intro: Super Simple High Power LED DriverThis Instructable will show you how to built a Constant Current for high power LEDs, using only two components.High power LEDs are getting
Either should work. As far as efficiency goes, I don't know. see this picture i attached.. And since there is only 1.8V left, I cant really run more LEDs,thge effficiency is easy to calculate and thus to compare (though in practice there may be slight variations): if 12v Led Driver Circuit Diagram
thanks for sharing
this is good driver for led. Probably not that efficient as a lot of energy will be wasted on heating up the LM317 device but still a good job.
can you use 1w led driver to power up Instructables will help you learn how to make anything!I'm in!About UsWho We AreAdvertiseContactJobsHelpFind UsFacebookYoutubeTwitterPinterestGoogle+ResourcesFor TeachersArtists in ResidenceGift Premium AccountForumsAnswersSitemapTerms of Service|Privacy Statement|Legal Notices & Trademarks|Mobile Site© 2016 Autodesk, Inc. There are drivers for 4-5, 8-15 etc for not much more.
Those fancy and expensive drivers doesn't support that. 1 Watt Led Driver Circuit Diagram the LM350 is equal to the LM317, but it's rated for 3 AmpsStep 3: Assemble ItShow All Items I couldn't get my schematic drawing program to work, so here is a You can connect up to ten high power LEDs to this circuit.
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The higher voltage you supply the LM317 with, the hotter it gets. It has 350mA and should have 3.2 - 3.4 Volts. is it correct? 3 Watt Led Driver Circuit Diagram With 24v in I think that would be 6, is that right?
Should I use a different regulator so I can use a resistor that I can actually find?
My calculation would be a 1,3ohm Resistor for 900mA at 12V
this is good driver for led. Thank you for your time! :)
Great job. btw its a good idea if the efficiency dont bother you
i'm prefer driving HPL with mosfet and npn transistor, since lm317 have big power loss. However you can't see any difference in the light output.If you use 3W LEDs, which has a current consumption of 700mA, the calculation should be: 1,25 divided by 0,7 makes 1,78.
you can use the extra 2.3 Amps to drive more LEDs or other electronics, if you want to.thanks AI. Type LED calculator into google and the top link is useful.
I like how simple this is. resistor can make your LED low bright or make life of led shorten because no other component limit the ampere.. More by Artificial Intelligence:Add instructable to: Contest GroupRelatedPower LED underwater lightsby Waterfox51Arduino-based High Powered Switching LED Driversby hanlin_yHigh Power LED Driver Circuitsby danConstant Current LED (Arduino) by marc.deloor.5Power LED's - simplest
If your still taking questions.
Or if anyone else here can help me.
If i was to use several star leds in series, all 1w leds, can they be different forward voltages? For a 3 Volt LED, you would need at least 6Volt input, whereas other circuits will let you use 5 or even 4 Volts input. it will be a good idea to use a heatsink for the LED as well. The closest E12 value is 3,9 ohms, it will give you a constant current of 321mA.
thanks Hasorry, here is the image link http://reefcentral.com/gallery/showphoto.php?photo=275324&papass=&sort=1&thecat=
Sorry, I can't sse the image. The constant current source has a drop voltage of 3 V, so the ...Show All Items This Instructable will show you how to built a Constant Current for high power LEDs, Or would one appear dim from low voltage, or the other burn out from over voltage.
Any advice, however little would be great. Ofcourse the efficiency of the LM317 circuit will get better when using more LED's in series it will always at least lose that 3 Volt x LEDcurrentYes you can, because your
I want to drive my 10W LEDs with this. The best way to drive an LED, whether it be by PWM or not, is by more directly regulating the current but ideally, not using a linear voltage drop stage which You have to be a registered member to view the image.oh sorry, here is the direct link. http://reefcentral.com/gallery/data/500/218872LED.jpg
That picture just shows a fish and says "Reef Central".Sorry, i dont Simply using a series resistor will do just as well, just as efficiently.
so it wont be a good idea to supply it with unnecessary high voltage.
Input voltage ?
why cant u put dot(.) instead of comma(,)
it makes little confusing.... :/
Why cant you look