The article discusses a simple 1000 watt LED flood light circuit which can be very easily made by even a layman. The circuit was requested by Mr.Mike, let's know more about the request and the circuit details:
Technical Specifications:
Hi from Canada !!
My name is Mike . thank you for your work . would it be possible for you , if you have time ! to make me a design for a 1000 watts electronic ballast for metal halide lamp ? a variable one would be even better .
I have 120 volts here,
Something simple to build if possible
thank you very much and Happy New Year
Mike
Analyzing the Circuit Concept
Hi Mike! Thanks!
A 1000 watt ballast will be difficult for me to design, I tried to find it on the net but I couldn't find any.
By the way you can go for LEDs instead of the proposed type of lamp for better efficiency and light.
And a Happy New year to you, too!
Regards.
Designing a 1000 Watt LED Lamp
A 1000 watt LED lamp can be designed either by connecting 1000 nos of 1 watt LEDs over a suitably designed PCB or by using 10nos of 100 watt LEDs togrther.
In fact a 100 watt LED module would also consist of 100 nos of 1 watt LEDs wired up internally.
The unit may be designed by incorporating 10 nos of 100 watt LEDs in parallel for generating the intended 1000 watts of white flood light.
The design would not involve much complexity, all the 10 modules can be connected together in parallel with their respective current limiting resistors.
Since each 100 watt module would require a maximum 36V, the current consumption would be around 100/36 = 2.7 amps. Therefore the limiting resistor would be R = (36 - 32)/2.7 = 1.5 Ohms/ 5watts.
32v is the assumed forward voltage of the 100 watt module.
However there's one drawback with the above design, it requires a 36V supply which is a pretty odd value and it would be difficult to acquire a suitable smps or a transformer with this rating.
Integrating 1000 nos of 1watt LEds might look a very time consuming task but it would provide you the liberty of designing the module for any desired voltage source.
For example if you wanted the module to work with a 12V supply you could wire 3 nos of these LEds in series and connect all these series in parallel. Similarly with a 24V supply 6 nos could be wired up in series and then in parallel.
Preferably, using 1 watt LEDs looks more comfortable as these can be tailored as per user preferences.
The following diagram shows how to wire 1 watt LEDs in series and parallel for implementing a 1000 watt flood light circuit.
For making the wiring easier, a 24V supply is selected here, which allows us to put 6 nos of 1 watt LEDs in series and make appropriate numbers of them in parallel so that the end value reaches close to the 1000 watt mark.
Calculating the Current Limiting Resistor
In all 1000/6 = 166 nos of strings can be used here, due to lack of space all the connections couldn't be included in the diagram. The resistor value is again found with the help of the formula:
R = {24 - (3.3x6)}/0.3 = 14 ohms
wattage = {24 - (3.3x6)} x 0.3 = 1.26 watts or simply using 2 watt will be fine
The assembly should be done over a aluminum based heat absorbing type of PCB.
Louis Jordaan says
Hi I want to make a 1800 watt flood light but my main worry is how to remove the heat at would be generated over time, any recommedation
Swagatam says
Hi, You will have to use large heatsinks with the concerned devices and also use fan cooling for the same, in order to keep things in control
Ashok Dhenge says
hi sir
what is supply circuit for 12volt/ 50 amp? actually i want to drive 100no of 1 watt led. how can place Led? i already asked question in 100 watt LED tubelight blog regarding placing LED in ceiling i think above article is useful for me but how can we drive? Any LED drive circuit?
Swagatam says
Hi Ashok
You won't need 50 amp, just 10 amps would be enough. It can be from a 12V/10amp AC/DC adapter.
I have explained the wiring details in the above article with the formulas.
For a 12V supply make LED strings of 3 x 33, calculate the resistor values as per the given instruction in the above article.
Use adequate heatsink for the LEds, and a cooling fan if possible for extreme safety
Anonymous says
Hey
i have to connect the resistors?
i can't connect the volt source direct to the circuit?
Wilder Solorzano says
I was reading all the comments and helps me understand my project… thanks for your time and all the help you provide us.. God bless you and your family….
Swagatam says
My Pleasure Wilder, God bless you too!
Ravi says
can i make 200 watt in this model
Swagatam says
you can make the watts as per your specs, simply use that many number of LEDs.
Under Construction says
dear sir,
very cheapest open area security system for 1 acre land protect.
Swagatam says
you will need to fence the area and put appropriate sensors such that when anybody breaks the fence an alarm is sounded.
Vaibhao Ingle says
hi sir,
sir i m thinking about resonance charging pls tell me is it possible? if possible then pls suggest me the about coil n distance.
Swagatam says
Hi Vaibhav,
I have discussed this concept in one of my posts, you may see it here:
https://homemade-circuits.com/2012/01/how-to-make-inductive-li-ion-battery.html
Vaibhao Ingle says
thank u sir.
sir somehere i read this frequency is repelle the insects like cockroches so pls suggest me which tweeter i use to output of the circuit. for good responce on 40 to 50khz frequency.
Swagatam says
Hi Vaibhav,
I don' think you can use any type of frequency to drive away insects or pests….that's a myth, so it would be a waste of time and energy.
Anonymous says
Sir I have a 3.7 v 8000mah l ion batt.pls sugest me a led emergency lamp digram.(chrg socket is in batt)
Swagatam says
I'll try to design the circuit and publish it soon….
Vaibhao Ingle says
thank u sir.
sir can u suggest me circuit diagram to genrate 40 to 50khz frequency.
Swagatam says
Hi Vaibhav,
You can make it using a IC555 circuit (astable mode)
Vaibhao Ingle says
thank u so much sir.
sir can u suggest me some project idea for my final yr project.
Swagatam says
I will think about it, and try to suggest something….
Vaibhao Ingle says
thank u sir,
sir i have some regulater with heatsink. they fix with screw. i seperated heatsink n regulator then i found some white colour material(poweder) pls tell me which is the material.
and let me know when i fix my led on heatsink can i need this material. n one more question. can i use fevikwik to fix my led on heatsink.
thank u
Swagatam says
White paste is called heatsink compound, yes you should use it while fixing the LEDs for better heat conduction. If you use this paste then you cannot use feviqwik or any other glue…..
Vaibhao Ingle says
thanks sir i done it.
and ist work fine. and i m enjoying the cool light
thank again sir.
Swagatam says
That's great!
Vaibhao Ingle says
sir every led has his own heatsink(star type) so can i fix all strings of leds on 1ft by 1ft aluminium plate?
and only one question pls tell me the thickness of alluminium plate
Swagatam says
Yes it can be done, try a 2mm thick heatsink.
Vaibhao Ingle says
hi sir.
i have 1w power led(350ma) and 12v 2amp smps
i had connect these led as 3led series total 5string of 3 leds and connet all 5 string in parellel. and connect 6ohm resistor to each series. then these confrigration connect to the smps.
Swagatam says
Yes, everything's correct, just make sure the LEDs are assembled on a heatsink type PCB and also fitted with external 1 feet by 1 feet aluminum plate.
Vaibhao Ingle says
thanks
dear sir,
my connections are allright i think my smps is local quility. so can i use 12v. 2amp trasformer with 7812.
Swagatam says
Hi Vaibhav,
Please provide full details of your LEDs and configurations….
Vaibhao Ingle says
hi sir.
tode i made this circuit. i connect total 15 leds. with 12v 2amp smps. its work fine. but the light of leds cant replace the 15w CFL why it is happen sir.
Swagatam says
Hi Vaibhav,
I should be as bright as a 15 watt CFL…someting may be wrong with your circuit.
Anders says
I'd like to point out that luminescence and brightness is calculated differently with LED. to be honest I have not grasped it completely myself. But converting lumens to lux seems to give me expected output. One could also used mcd and candela to get an approximation of brightness.
Swagatam says
thank you Anders, you may be right, appreciate your valuable feedback.
Vaibhao Ingle says
thanks for quik rply…
sir i connect 3nos of led in siries n thes (total 5 series) and all series connet in parellel (total 15 leds) with 12v 1amp smps bt led not full bright. but when i connet only 3leds to smps. led glow with full brightness. i think this is current rating proble.
sir pls tell me the smps current rating which suitable for 15 leds. and which resistor connect in each series.
thanks.
Swagatam says
You can try a 2amp smps…be sure to connect a 6 Ohm resistor with series.
Vaibhao Ingle says
thank u very much sir
sir i done confrigration in mentoin my comment and connect the 10ohm resistor each series. bt led not glow with there full brightness.
so wht can i do sir?
thanks.
Swagatam says
with a 12v supply you would have to reduce the series to three nos of LEDs….for the above config a 24V supply would be required.
The smps current rating also becomes a major factor.
Vaibhao Ingle says
hi sir thanks for rply. i have 1watt power leds. 12v. 3amp smps so can i use 4series X 4parellel leds means 16 leds?
Swagatam says
yes….but your smps must ensure a constant voltage…and it will normally do.
Under Construction says
hello Sir,
can we use this circuit for 220 AC volts..can you post a driver circuit for this 1000w led lamp…thank you..
Swagatam says
You will need a 24V/50 amp SMPS power supply for this circuit.
Or you may use a 0-24V/50 amp transformer power supply for driving the above circuit.
sat says
Sir,
what is the ampere rating of Transformer 24v ? 50 in 24v/50 refers to cycles ?
Swagatam says
50 is the amp or current rating of the trafo
Vaibhao Ingle says
hi swagtam you r realy good job
i need ur help frnd pls tell me the circuit to glow 20no. 1watt led with full brightness {means 350ma} pls tell me the circuit with transformer or without transformer
Swagatam says
Thanks Vaibhav,
you can try the configuration explained in the above article…..