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INTRO.

I had to do this project for many of my young friends who are interested in LED’s but do not know how to go about it.

I also had the same problem but was fortunate enough to get HELP from my friends at www.Instructables.com.

This is not about any calculation or study but a set of proven rules to follow and get results,

which anybody can do if he has the mind to.

Here I have shown you many types of power supply which can be used to glow a LED.

I have also shown here how different types LED's can be made to glow and use it in you project.

Step 1: KNOW YOUR LED

A 15 mm LED has two legs, the long one is the Positive and the short one is the Negative.

It consumes 15 milli Ampere of current and can glow on 3 Volts DC Current, or a 3 volt battery.

LED’s are Diodes and the current can only pass through the POSITIVE side.

Always remember to maintain the POLARITY of the LED, that is (plus to plus) and (minus to minus) otherwise it will not work.

LED is a one way street. Now you know how to connect an LED in your circuit.

<p>Hello I want to connect 20 1W LED. which one should I use power supply?</p><p>My Prof recommend me to use 3V-20W but I cannot find it. what is another option to do it? I can divide 10/10 so 2 groups. this project is killing me. </p>
Use this circuit it is easy and reliable...
<p>Hello, i have a question about connecting 1W, 350mA leds to a power bank.<br>I was wondering if i could connect 7 1W, 350mA 3.2-3.6V Leds to this powerbank,<br><a href="http://files.xiaomi-mi.com/files/power_bank_20000/powerbank20000-en.pdf" rel="nofollow">http://files.xiaomi-mi.com/files/power_bank_20000/...</a><br>and what would be the best way to do it?<br>I think i should connect them parallel, and add resistor, but i dont know which DC output i need to consider for this? It says it is 5.1V, 2.1A(3.6A max), but battery is 3.6V.<br>7x350 is 2,450, but if i connect them either way, each led will get 300mA and should work just fine but dimmer?<br>But i need help with figuring out the voltage, and what resistor if any to use.</p>
OK try it....
<p>sir is it possible to hook up a 12v 30w led chip directly to a 12v <br>battery w/out driver. I've seen a company selling a unit for <br>floundering, and it's just a heat sink with a led attached and wires coming from <br>it</p>
<p>Could you please add the Image.......</p>
<p>like this</p>
<p>Use a 30 watt LED Driver as shown in the Image....</p>
What size battery and how long should it last......
Thanks.. yeah I was just trying to figure out how they are getting away from using the driver. The company said its a direct hook up to a battery without a driver. I'm not using their light, but making my own. I guess their setup will not be as stable?
<p>Hi Dipankar,</p><p>This is my first project. I have a 30w led I would like to power from a wall outlet with as few components as possible. I found an led driver made by Introcircuit with an output &quot;DC 12v, 2.5a, 30w&quot;. It has 110 power outlet plug coming out of one end of the driver and a red (+)and black (-) wire coming out of the other end. </p><p>Do I need anything else for this to work?</p><p>The led (pic attached) I have doesn't have a (+) or (-) indicator on either connector. Does it matter which connector I solder the wires to? </p><p>Thank you for your help!</p>
Should have a (+) or (-) indicator on either connector. It Does matter because LED are Diodes and it should have a + and - poles.<br>Go to Google Image and find out.
<p>The driver I listed above is constant voltage and if I am right I actually need constant current driver. I found a 30W CC driver on Ebay (https://goo.gl/Jiig10) but the output states it is DC 20 - 36V. </p><p>Will this driver do the job without blowing out the led?</p><p>Is there a better place to buy reliable drivers than Ebay? </p>
I took the protective cover off and found the + and - poles. They can also be seen in the pic.
<p>Excellent presentation;the use of &quot;one line opposite to the other&quot; while using AC.is a stroke of genius which i have not come across in many of the online texts i have read.i wish you had also given on how to use solar power for the one watt LED.</p>
<p>Thanks...That will be my next project......</p>
<p>i look forward to the solar powered one watt led.</p>
<p>Been running three 1 watt (cool white) bulbs in series for six hours straight with two dry cell D batteries using a diy joule thief circuit and they are still about as bright (full brightness) as they were 6 hours ago, plus they are barely warm without a heat sink. You can make your own joule thief circuit for an extremely low cost, but I got most of my parts from an old computer power supply; I'm totally amazed! Ran these for a few hours using two generic non alkaline dry cell AA batteries, although it wasn't quite as bright as with the Ds, but still very usable! Gonna be experimenting with 10 watt units soon. Bet I get a few hours out of them once I modify the circuit. You could probably get many days of good light from a car battery, but only with this device. Not really sure how long the two Ds will last since this is my first experiment using these bulbs, but I'm impressed with six hours and counting!</p>
Sir i have 10w 1 led i want to run in car please suggest me 12 volt 70A battery<br>Specifications:Item Type:LED Light (10 Watt) 8000k <br>Intensity: Typical 800~900 Lumen<br>Voltage: 9 to 12 Volt <br>Forward Current:1000mA max.<br>Beam Angle(&deg;):120&deg;<br>Average Life (hrs):Greater than 50000 HRS when used with proper heat sink on these<br>Color:White<br>Color Temperature:Cool White(6700-8000K)<br>Led Bulb Type:Spotlight Bulb
It is better you search for the answer on Google...
<p>Dipankar, I have purchased both 1w 3-3.2v led bulb, 300-350mA and 3w <br>leds and would like to make my own lamps for both indoor use and outdoor<br> use. I guess when I purchased I would be able to light them easily but<br> have many issues getting them to light. Can you help with what I need <br>to get them to light. I was able to get 5 of them in series to light <br>using a cheap Solar outdoor kit by removing the original light and <br>hooking the wires up to the leds. I was unsuccessful using a battery. <br>My ideas was to build custom outdoor lights to run on 12vac low-voltage <br>outdoor lighting but I'm unsure how to wire the leds to support a <br>transformer that converts the ac to dc and what size transformer I would<br> need. I purchased this from Amazon - <br></p><p><a href="http://www.amazon.com/Outdoor-Waterproof-Landscape-Converter-Rectifier/dp/B00SGMW4K8?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00" rel="nofollow">http://www.amazon.com/Outdoor-Waterproof-Landscape...</a> </p><p>which<br> would allow me to hookup an LED strip light to outdoor lighting. Do <br>you think this would work or would it burn my LED or LEDs in series up? <br> I hope you can help, I have searched the internet for sometime trying <br>to solve my problem. Thank you. </p><p>1w leds - <br></p><p><a href="http://www.amazon.com/uxcell-Terminal-3-3-2V-White-Emitter/dp/B00H8VZXXI?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_detailpage_o03_s00" rel="nofollow">http://www.amazon.com/uxcell-Terminal-3-3-2V-White...</a> </p><p>3w leds - <br></p><p><a href="http://www.amazon.com/Power-White-Emitters-170-190Lm-6000K/dp/B00JR5CV4C?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_detailpage_o02_s00" rel="nofollow">http://www.amazon.com/Power-White-Emitters-170-190...</a></p>
<p>Send me your e-mail id.....with the question.....</p>
Dipankar, I'm not sure what you mean, do you want me to email you privately or give you my email address here.&nbsp; I sent you a private message with my email and question.&nbsp;
<p>Send me your e-mail id.....with the question.....</p>
Sir<br>I have three led 1wat+1wat+1wat. I want to glo them with 4.5 volt betry in parallel combinatio. Please send me the valu of rister and also guide me that risister shuld be in seres or parallel. What is beter way guide me with diagram
<p>please tell me we are using samsung modular led the 1.28 volt with 3 led bulbs what is the electricity consumption in per hours.Im using in Glow sign board with 23 modulars pls explain me per consumption for per hours </p>
<p>Sorry I don't know......</p>
Sir<br>I want to charge my 4 volt betry with my nokia charger with charging socket. Can i plug in charging pin into betry or i need any other ristor or diode to use plese guide me with dia gram
<p>You CANNOT charge a 4volts battery with a mobile charger.....</p>
Sir i have 10w 6 led i want to run in car please suggest me 12 volt battery
<p>What is the specifications of the 10 watt LED's?</p>
Specifications:Item Type:LED Light (10 Watt) 8000k <br>Intensity: Typical 800~900 Lumen<br>Voltage: 9 to 12 Volt <br>Forward Current:1000mA max.<br>Beam Angle(&deg;):120&deg;<br>Average Life (hrs):Greater than 50000 HRS when used with proper heat sink on these<br>Color:White<br>Color Temperature:Cool White(6700-8000K)<br>Led Bulb Type:Spotlight Bulb
<p>10 watt LED, You can run it on 12 volts car battery</p>
S
Sir i have 10w 6 led i want to run in car please suggest me 12 volt 70A battery<br>Specifications:Item Type:LED Light (10 Watt) 8000k <br>Intensity: Typical 800~900 Lumen<br>Voltage: 9 to 12 Volt <br>Forward Current:1000mA max.<br>Beam Angle(&deg;):120&deg;<br>Average Life (hrs):Greater than 50000 HRS when used with proper heat sink on these<br>Color:White<br>Color Temperature:Cool White(6700-8000K)<br>Led Bulb Type:Spotlight Bulb
<p>10 watt LED consumes 1 Amp current. 6x1=6 amps. Your car battery will be dead in one hour.</p>
Any another way. Just use flash light
Hello.am planning to make an aquarium lighting using 6 10 watt square led for flood light. Also I will use a 450 watt pc power supply. How do I proceed with the wiring?
This
<p>And how about using h4 head car lamps to iluminate some specific palces of the house? ...My desk for example.</p>
<p>OK</p>
1 watt = how much volt ?
<p>3.5volts DC......</p>
1 watt =3.5 volt. Is that right sir...!!!
<p>1 watt LED runs on 3.5volts DC</p>
<p>does this actually work for powering LEDs on AC mains? : http://www.instructables.com/file/FIVRUBHH8TTP6SY </p>
<p>Yes</p>
1watt = how much volt
<p>Sir good day where can i place my capacitor?</p><p>this circuit is from</p>LED on AC Mains<p>by <a href="http://www.instructables.com/member/pandyaketan/" rel="nofollow">pandyaketan</a></p><p>1N4007 anode to negative of the LED(5mm) and a resistor(22kilo ohms-2 watts) connected to the positive of the LED</p><p>here is his circuit</p><p>Thank you and GOD bless!</p>
<p>Sir good day where can i place my capacitor? </p><p>this circuit is from </p>LED on AC Mains<p>by <a href="http://www.instructables.com/member/pandyaketan/" rel="nofollow">pandyaketan</a></p><p>1N4007 anode to negative of the LED(5mm) and a resistor(22kilo ohms-2 watts)</p>

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Bio: Now I am a retired person, who enjoys life and making small things to pass the time keep myself busy.
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