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Constant Current Led Driver Circuit Diagram


Escpecially those calculations, but where those 0.5 and 0.25 came from?

I made a 1 amp version like the one you have on the Veroboard to power some white LED strips. I am sure i have a book around here with a great schematic if you cant find one. Sign in Transcript Statistics Add translations 376,397 views 878 Like this video? Or would one appear dim from low voltage, or the other burn out from over voltage.

Any advice, however little would be great. have a peek here

Constant Current Source #1lets get to the new stuff!The first set of circuits are all small variations on a super-simple constant-current source.Pros: - consistent LED performance with any power supply and This gives a full range of 0-100% dimming. 20K Ohm Potentiometer This is usually recommended when you only have one driver in your circuit but if there are multiple drivers being thank you very much sir... Is this a good idea?

Thank You

Hi there, this is a very good instructable with nice presentation.

I am planning to build constant current source #1.

Led : 10 W

Forward Voltage : 9-11 V.

Forward http://www.instructables.com/id/Circuits-for-using-High-Power-LED-s/

Constant Current Led Driver Circuit Diagram

it turns out we also want to do this so we can interface this circuit with a microcontroller or computer. Currently he operates MonkeyLectric where he develops revolutionary bike lighting products. Second, if you have a stable power source from your power supply, there really isn't a need to control your current in such a manner.

For a 3 watt LED it's approximately 2.38 watts. Im afraid i would damages the led or burn it out.. Please give the method. 10 Watt Led Driver Circuit Diagram So if you have a 24V supply available, you can safely connect 7 LED's in series.

the symbol shown is correct.


You are wrong, the symbol is that of a P-Channel

Our 24VDC 1.7A power supply would be more than sufficient for this project as you can find wattage by multiplying your 24VDC by the 1.7A which comes out to 40.8 Watts, 12v Led Driver Circuit Diagram It seems so simple! in order to avoid much duplicated content this project only discusses specific circuits and their pros and cons. http://www.instructables.com/id/Super-simple-high-power-LED-driver/ I thought it was 7V at If=700mA instead of 3.3V.can you please provide the specs.

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12v Led Driver Circuit Diagram

I suggested we check it first with a multimeter. https://www.circuitsdiy.com/cheapest-high-power-led-driver-circuit-diagram/ with a large heatsink, this circuit can handle a LOT of power & current - probably 50 watts and 20 amps with this exact transistor, but you can just put multiple Constant Current Led Driver Circuit Diagram there are now a lot of surface mount regulators with ultra-low dropouts for low current use, if you need to power 1 LED from a battery these can be worth looking Led Driver Circuit Schematic I then short the string to 23 and measure and it is still [email protected], but I want [email protected] across each LED.

There's a micro blue potentiometer on this module and I don't

Thank you. navigate here It's ideal for High-power LED's especially, and can be used for any number and configuration of normal or high-power LED's with any type of power supply. Now I like to make a power supply and backup for that. or link to the datasheet of the LED used here..?regards,josephReplyDeleteRepliesSwagatam MajumdarAugust 29, 2013 at 9:39 AMHi thanks,Different manufacturers may provide sightly different specs, one says it's around 4.5V as given here:http://www.lumex.com/images/Lumex_New2w_3w_5w-HPleds.pdfNo 3w Led Driver Circuit Diagram

The shipping offered is meant to provide the widest variety of shipping options at the lowest price: FREE USPS First Class SHIPPING on orders under 13oz$5.99 GROUND SHIPPING on orders under easiest way to do it: use 555 IC, best calculator for this:


(use datasheet to map pins and IC limitations).

2.a: use any kind of microcontroller to generate PWM signal Therefore, the real question I'm asking is "Can I put resistors on each of the 50 parallel strings?". Check This Out About Press Copyright Creators Advertise Developers +YouTube Terms Privacy Policy & Safety Send feedback Test new features Loading...

so if AC main supply is there means , the light panel and the sensor should work with the AC main supply. Diy Led Driver Circuit for more current you need to put the LED and Q2 on a heatsink (see my notes in other power-led instructables i've done).prototyping-boards: i didn't use a proto-board initially, but i So we've created a "feedback loop", which continuously monitors the LED current and keeps it exactly at the set point at all times.

I don't know much about electronics or how to put a circuit together so I would like to know if this circuit already exists and can be purchased.

Thanks so much for this and for making it so easy for novices like me. :D

Thanks for sharing, this helped! Collection Intro Intro: High Power LED Driver CircuitsHigh-power LED's: the future of lighting! It's brightness doesn't seem to vary with the variable duty cycle. 1 Watt Led Driver Circuit let's makeExplore ContestsClassesPublishFeatured:3D Printing ClassArduinoSewingWith Instructables you can share what you make with the world, and tap into an ever-growing community of creative experts.How it Works »New Instructable »High Power LED

to use that circuit get rid of M1, D3 and R2, and their Q1 is our Q2.Step 9: Another Dimming MethodShow All Items ok, so maybe you don't want to use Useful one ? we need to keep the NFET Gate (G pin) below 20V if we want ... 8 Step 8: A Little Micro Makes All the DifferenceNow what? this contact form TIA

I forgot to mention, I'm planning to use 12Vs to power the series up (the yellow and black wires from a PC's power supply), would that be enough?


I would like

From the above rough formula we can say that 3 LED's in series will require:

V = 3.2X3+1 = 10.6V

So a 12V supply will also work with 3 LED's, but to keep This will ensure there will be no shorts due to the heatsink. Reply ↓ Taylor Scully Post authorDecember 7, 2015 at 7:52 pm You are correct that the driver would not "like" having resistors in the circuit (the driver would just increase the Always exploring and staying active outdoors while keeping a close eye on different trends and new technologies that could change the world for the better.

Here are the needed parts. I have 5 and10 watt led. And LEDs should be run from current regulated source.ReplyDeleteRepliesSwagatam MajumdarApril 3, 2015 at 5:25 PMyes I know, this has been already discussed in one of the previous comments with Richard Hoad Microcontroller also operates on same 3.3V battery.

Now, add a paper sticker or tape to the area below the selected place for the IC+heatsink. 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. Those fancy and expensive drivers doesn't support that. Thank you for your time and dedication.Excellent article!

I've used it to power some LEDs at 350mA but I am looking to assemble a light using LEDs that require a higher current and just want to ask a few If i connect ten LEDs in series means i need 3.5 x 10 = 35v.