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3 Watt Led Driver Circuit Diagram

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with a large heatsink, this circuit can handle a LOT of power. a Resistor (see next step). From what I know:

You would need to switch out the resistors and ensure the other components can handle the current you require. When too much current flows through R3, Q1 will start to turn on, which starts turning off Q2. http://scriptgratuit.com/led-driver/1-watt-led-driver-circuit-diagram.html

The circuit is a "constant current source", which means that it keeps the LED brightness constant no matter what power supply you use or surrounding environmental conditions you subject the LED's I am surprised to find that the original circuit is still being published without correcting the flaw. Reply With Quote 08-28-2009,08:55 PM #11 Mr Happy View Profile View Forum Posts Private Message View Articles *Flashaholic* Join Date Nov 2007 Location Southern California Posts 5,390 Re: 1 watt 350 Make sure the FET is a logic level type FET so you can switch it on/off correctly with Arduino voltages. http://www.homemade-circuits.com/2012/03/how-to-make-simplest-1-watt-led-driver.html

3 Watt Led Driver Circuit Diagram

Notify me of new posts by email. Reply With Quote 08-25-2009,03:45 AM #2 yellow View Profile View Forum Posts Private Message View Articles Flashaholic* Join Date Oct 2002 Location Baden.at Posts 4,439 1st idea: You end up much The time now is 05:08 PM.

D1 ought to be ideally changed to two diodes in series for preserving the 2kv spikes bursts genareated by C1 and C2. Know that it is possible to arrange parallel LEDs (and, more commonly, branches of LEDs in series) but it is of no concern to you at this moment. RF remote control provides long range of up to 200m / 650ft and can find many uses for controlling different devices, and it works even through the walls. 5w Led Driver Circuit Diagram 230v input:220V ac.

I think I'll use the LM350 and a 3.9 Ohm resistor. 10 Watt Led Driver Circuit Diagram the man said 0 Ohms meant open circuit. Here i'll explain how the circuit works, and what the maximum limits are, you can skip this if you want. http://www.instructables.com/id/Power-LED-s---simplest-light-with-constant-current/ Howerver:

I would like to use 2x 3 power leds in serie in parallel, each led with If = 350mA en Vf =3.2-3.5 V

Can I just use the 2x parallel 3 leds

I suggested we check it first with a multimeter. Constant Current Led Driver Circuit Diagram just glob on the silicone, and make an effort to get rid of any air bubbles. 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. Turning off Q2 reduces the current through the LED's and R3.

10 Watt Led Driver Circuit Diagram

in matter of cost efficiency 1 mosfet, 1 npn transistor and 1 limitting resistor would be great. http://makingcircuits.com/blog/2015/09/1w-4w-6w-10w-12w-led-driver-circuit-smps.html morethan 24V will work and change your resistor to 1ohms

i think the heat would be problem. 3 Watt Led Driver Circuit Diagram When I looked up the model you posted, it stated that it's a MOSFET. 5w Led Driver Circuit Diagram So we've created a "feedback loop", which continuously tracks the current and keeps it exactly at the set point at all times.

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 overheat

Where would I hook up the pot meter Check This Out R3 power is 0.1 watt, so a standard 1/4 watt resistor is fine.where to get the parts:all the parts except the LED's are available from http://www.digikey.com, you can search for the resistor can make your LED low bright or make life of led shorten because no other component limit the ampere.. R3 power is 0.1 watt, so a standard 1/4 watt resistor is fine. High Power Led Driver Circuit Diagram

is it greater than the Vf of the LED [step down needed]? How can I connect more LEDs, any modify this circuit..... 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 http://scriptgratuit.com/led-driver/100-watt-led-driver-circuit-diagram.html that's why this circuit is convenient!

Calculations: - LED current is set by R3, it is approximately equal to: 0.5 / R3 - R3 power: the power dissipated by the resistor is approximately: 0.25 / R3 I 10w Led Driver Circuit Diagram Then use a part like the LM317 in a current regulating configuration to produce a 350 mA constant current supply for the LED. As far as efficiency goes, I don't know.

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

Thanks for sharing, this helped! Hi! Also, to add to my question, how efficient is your design?Your setup looks fine to me. 230v Led Driver Circuit Diagram The voltage across each LED is therefore set by the LEDs themselves [See the LED I-V Curve picture attached].

How can I use this circuit in an array of, 20 10W power

but you can use ... 5 Step 5: Keep Buildingnow we'll start connecting Q1. Driving a high power LED is not that easy. you can use a wide variety of power sources and it will always light up exactly the same.heat sinks: here i'm building a simple light with no heatsink at all. have a peek here first, glue Q1 upside-down to the front of Q2 so that it is easier to work with.

It currently runs a 45 LED string.

What I want it to do is to run a 23 string @ the same rating.