Copyright 2019 LEDSupply. Perfect LED Retrofit Solution for Landscape Lighting using a 12VAC Transformer, Introducing Phihong: Now Source a World Leader in AC LED Drivers & Switching Power Supplies from LEDSupply, Single Color WiFi & Voice-Activated Control. 4.5v AC and the resistor limits the current to make it suitable to run the LEDs, how to design a circuit in which which i want different LED'S to glow for different voltages
like given 1V only red led should glow,for 2V only green led should glow,3V only blue led should glow, Hi.

With smaller systems, like desk lamps and such, it will probably be easier to still stick with a low voltage driver. (For more information, please contact our sales . Today, it seems ‘LED driver’ and ‘LED power supply’ are used interchangeably.

I don’t have to purchase a different dimmer! Limited Edition... Book Now Here. This allows you to hook a driver right up to line voltage and then adjust the LEDs without flicker and shifting of light. Most LED drivers are compatible with 0-10V Dimming control devices that are available all over as this has become common practice for LED lighting and was even used for fluorescent dimming before LEDs were around.

Im waiting eagerly for a solution.
I connected 24 leds with one resistor and one capacitor in series.
1kohm/3w
.22uF/1200w, Heya i am for the first time here.


After you have made sure current and voltage line up, you have everything you need to easily check the wattage. It can get confusing but the names are just technicalities, what matters most is knowing what type of input your LED(s) require, and purchasing an LED power supply or driver that will provide that. I've checked out the 'how to calculate' link above but it only discussed calculating for the resistor (great refresher – for DC, but we're dealing with AC (the mains) so you, There !!!



A Cree XP-E2, for example, has a max rating of 1000mA, therefore you would want to choose a driver that outputs 1000mA (1 Amp) or less. Is that ” why we use capacitor in circuit?? In this case you will need a constant voltage power supply, like one that powers a laptop, to plug into the wall and then deliver a safe low DC power to the constant current driver that will then deliver a steady current to your LED. Once you know your total voltage you will need to select a driver that has an output range including that voltage. - Going back to my example above, lets say that a friend of mine suggested using low voltage drivers rather than the offline driver I had originally selected for the spot lights around the room.

These are great for general lighting purposes around the home and when you retrofit a more permanent, stationary fixture. This means that your LED’s forward voltage (Vf) must be within that range (not any lower, not any higher). Board-level C3LED device: One early form of a "true" AC-LED system, in which the devices operate when connected directly to an AC supply, is the "Christmas tree light" approach.

Many people forget to even keep track of wattage when dealing with AC drivers.

however the resistor in the circuit is burning out in less than a minute. The second one ( Circuit diagram) which i have tried so here is the result. Dear FURQAN463@
If you design this whole circuit in a notebook paper without inserting that wires, you will find that their will be 4 strings each having 6 LED's. and these LED's will be in Series.
So then try to make the same circuit with that specific wires. This circuit may flicker at 50 or 60 Hertzs/sec.

For this.. my que. If you wanted to gain the same efficiency as using an AC driver, it would be best to purchase a higher end power supply like the lines from Phihong.
in real ( i did not make the circuit on PCB, that’s why i m saying that pleas be careful) supply voltage off. Please be careful because your safety is better than everything. In larger systems when you start adding more LEDs into the array, a higher voltage will be required.

Although AC is input to this LED bridge circuit configuration, the LEDs are still driven with DC and this approach requires more drive power than a "true" AC-LED design.

My question is what capacitor and resistor should I use if I wanted to use 36 LEDs? Whereas if you were using the Cree XP-L, which can be driven up to 3000mA, you would not have this problem and could use any of our drivers, including this 72W Phihong Driver that outputs 3 Amps (3000mA) and would drive them at their max which is super bright! ALUMINUM HOUSING OUTDOOR SWITCHING POWER SUPPLY 5. Power Consumption of the Circuit is about 2Watts, Volt-Amp rating of each LED’s is 3.2V -25mA, For 100No of LED’s,(connect back to back as shown above) reduce the R1 to 220, For 50No of LED’s, (Connect back to back as shown above). 230 V 50Hz AC (or 110V 60Hz) Main Operated LED Powerful NIGHT LAMP Circuit Diagram. EE-Tools, Instruments, Devices, Components & Measurements. All measurements are on the product pages of the drivers. Now cheaper is not always better, but in this situation, that is the case as it also cuts down on the number of components, making for a more professional looking light. Now they can switch to more efficient lighting in LEDs, while keeping the same dimmers! Remember that if you have LEDs in parallel off of a driver, that drivers output is divided by however many different strings you have. Also, If you have plane to use this Circuit on 110V 60Hz instead of 230V, 50Hz, or want to modify this circuit, Then See the Section ” Common Question about this Circuit” below the “instruction”. When we say, ‘LED driver’, we mean an AC to DC driver that takes 110-305VAC and outputs a constant current to your LEDs. This small Phihong 6 Watt driver is actually the only AC driver that we carry that is small enough to power just one LED as its minimum output is 2.5VDC.

Say I want to set up some lights around a room in my house to highlight the wall art.

AC LED drivers eliminate the need for the added components. Try to make this Circuit on a General purpose PCB. In the rest of this post, however, we will go over why AC LED drivers, or off-line drivers, are beneficial and how they can cut down on the size and cost of your LED system. Breakthroughs in UV-C LED Efficiency Can... Understanding LED Drivers and How To Choose... Everything about LEDs: Learn the basics of... How to Choose a Mean Well Power Supply: LED... 7 Things to Know Before Buying and Installing 12V LED Strip Lights.

Good afternoon friends.
My name is john, my passion to design an LED star lighting system is very intense but i don't have the complete knowledge yet, that is why i decided to access the internet to acquire more knowledge, in search i found your blog, with what i saw i was amase and as well happy because i know i can get some aid from you.

My question is if my main is 220V, Dear,
Read this article
How to calculate the value of resistor for LED’s (with different types of LED’s circuits)
https://www.electricaltechnology.org/2013/08/how-to-calculate-value-of-resistor-for-LED-circuits.html, What is purpose of inserting the capacitor in series with circuit ……, what is the benefit of this grouping of led's ?
and what is the advantage of this type circuit over a circuit in which we connect all led's in series and a resistor accordingly without capacitor ?
also, what is the purpose of capacitor in first diagram, doesn't it cause over-voltage in the circuit whenever the ac cycle gets reversed ?

also, isn't it dangerous, the capacitor drops the voltage from 220v to approx. High Power LEDs will need at least 350mA of current. So basically, if you just have an application where no dimming is needed, simply select a driver with no dimming as they cost less. Your email address will not be published. AC AD ADAPTER SERIES, Shenzhen Intech Electronic Technology Limited.

Description and important instruction and data are given below (step by step).

| Showroom Marketing and technology enthusiast helping pave the way to a more energy efficient society. AC drivers are essentially an LED power supply and LED driver combined, they take in 110v and output a DC voltage while driving the LEDs at a constant current.

When a transformer is required (when you are going off AC power, not battery) DC drivers and AC drivers have very similar efficiency.

Our website is made possible by displaying online advertisements to our visitors. All Rights Reserved. If the power supply is cheaper then it likely doesn’t have the highest efficiency.

There is always a maximum current rating for LEDs, and if you go over that specified current, the LED will be driven too hard and degrade at a fast rate until it ultimately fails. You can find your LEDs forward voltage by checking it on the product pages or data sheets. | The new Phihong Triac Dimmable AC driver line we offer, for instance, offers quality dimming with many popular dimmers.

With LEDs, dimming is done in a variety of ways. Required fields are marked *, All about Electrical & Electronics Engineering & Technology. After looking in the AC driver section and using the output current filters, I find this Phihong 15W driver that outputs a current of1000mA and has an output voltage range of 10.5-15VDC.

Living in the beautiful state of Vermont and working for a company like LEDSupply that is helping provide LED products to save on energy is a great place to be in accomplishing this. It is when you start setting up larger systems running from line voltage, typically between 110 and 120VAC, that you will need more components to bring down the AC voltage to DC and protect the LEDs from line-voltage fluctuation. 0-10V dimming is a simple and very effective way of dimming multiple LED lights, but sometimes users want more. With many users that are already in a home with smart lighting controls or a large line voltage dimming set up, it is a make or break situation on if they can make their LEDs work with this system.

?”, Two points I want to raise 1. White LED’s are recommended in this circuit.


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