LED strings - 12v or 5v - Which should you Buy and Why.

Here's a comparison of 12v and 5v LED strings, to help you decide which is right for your project.
If you’ve shopped for LED strings you’ve seen they come in 2 flavors, 12v or 5v. Not sure which you should get? Let’s compare them and decide which is best.
First point of comparison is price. When I did my first Holiday LED project I bought the 5v version, mostly because they were significantly cheaper if you buy 10 strings at a time. $10 vs $14 per string, for otherwise identical lights. If you don’t get the 10-pack then the prices are about the same.
Link for 12v or 5v LED strings - a.co/brD3d4I
Another important consideration is the power supply. Prices are very similar. 20 amp power supplies for both voltages are about the same price.
12v 20 amp PS: a.co/grHoBt9
5v 20 amp PS: a.co/8wNDIC0
One thing to consider about the power supply is that the controller you’re using is probably going to require 5v power. So if you plan on powering your controller from the same power supply as your lights then 5v gets a point here. However, I have a recommended solution. Find yourself an abandoned computer, you probably have one around the house or maybe find one at the thrift store. Computer power supplies have both 12v and 5v power, and usually plenty of amps to power a lot of lights.
Next question is; are 12v lights brighter than 5v lights? Nope. Actually, the LEDs in these strings “use” or “require” the same amount of voltage. Depending on the color between 2.1v and 3.8v. So at each LED there’s a resistor that drops the voltage from 12v or 5v to something in the range that the LED can really uses.
So then what is the point of different voltages? The only thing left to compare is voltage drop. Voltage drop occurs when electricity travels long distances in a wire. A good wire has low resistance, but not NO resistance, and the longer the wire the more resistance it creates. Thinner wires also add more resistance than thicker wires.
Here’s a comparison of 12v lights and 5v lights and how they are affected by distance, and voltage drop.
So which one is right for you? Well, as usual, it depends. If your project doesn’t require lengths of more than 15-20 ft (or 5-6 meters) then you could save some money using 5v lights.
If you plan to run your lights farther than that, you could use 12v lights, but adding extra 5v boosters every 15 ft isn’t very expensive. So you could still save money with the 5v lights. But if the hassle of running the extra wires seems worth the money, then go for the 12v lights.
Hope that helps.
The End

[@AndyDoesJapan]

Holy crap, this was so helpful! I went from "I have no idea" to "I know exactly what I'm getting" before the video was even over. Thanks alot!

[@DrZzs]

Awesome! Glad it helped!

[@GS-qe3pt]

Most complete video on youtube about this subject. Thank you very much!

[@ilducedimas]

Your video answers so many of questions I've had for a long time. Thanks a lot !

[@TokyoAkiHara]

Thanks for the video!! This was so clear and simple to understand! I'm looking into buying a lot of LED strips to literally ''lit'' my room into a RGB wonderland and to me, 12V would have been brighter than 5V. Well considering the higher number. But now I understand what the difference is and I can make easier decisions!

[@DrZzs]

Great! Mission accomplished!

[@davidferreira4518]

Damn.. It's rare for me to comment on something, but this video was just perfect. Simple and concise with really good visual examples. Take my like sir and thank you!

[@essenceofveles]

This is was so helpful. I wish I could give two thumbs up.

[@2Ustfu]

Thanks Justin for another very informative video. I am thinking of running crown lights around the perimeter of my living room ceiling. The perimeter runs about 20 meters total, and I was about to buy some 5V power sources with 4 boosters. But having a single 12v power and stringing 20 meters of LEDs would make a neater presentation. I am glad I saw this video before I began this project. Saved me a lot of time.

[@DrZzs]

Excellent! Mission accomplished!

[@butchford757]

Thanks for the refresher training. It has only been 35 years since my basic electronic training in the Navy. And like most things. Use it or lose it...

[@DrZzs]

Time to start using it constantly then in all your new Smart Home projects!

[@iamprawin]

Uujjn

[@stevea8201]

Terrific, answered all of my questions perfectly!

[@1997MHz]

Great explain on voltage drop :)

[@MrTenwisemen]

im so glad i find your video guide this is a big help for me for my project because i honestly not a techy nor good in electrical but when it comes with your clear explanation i find it simple. thank you 💖💖💖 from Philippines im your new Subscriber now. 😉👌

[@LivingWaterEternal]

Very well presented, straight forward presentation. Nicely done and informative, thank you.

[@DrZzs]

Thanks!

[@nawfel9971]

Thanks you so much for the video!! ivz planed to do a cosplay project and hesistate between 5v and 12v to have brighter led decoration on my armor and you just made me understand things !

[@tomkar013]

Super helpful!! had no idea that the old pc sitting in my cupboard could solve all of my powering issues!

[@DrZzs]

When all the other parts of an old PC are outdated and useless, the power supply is still worth keeping. I've gone to the Thrift store and bought old junk PC's for $10 just to get the power supply.

[@tomkar013]

DrZzs yeah that’s a good idea, I think I might do that.

[@Cryptic78]

Thanks for the clarification. This helped!

[@kennethcoletrajano1119]

Thank you for this! I was really in the dark on what these dv voltages differ from each other!

[@muralibommanna7789]

Lovely video .Nice explanation with live demo.Wanted to do 200 feet led strip light for a hall and was thinking about 5 volts.Increase in voltage doesnot change brightness , the second lesson.Such a great help.Thanks for the nice Job DrZzs.

[@DrZzs]

Glad to help! These are lessons I learned and figured others could use too.

[@kylelind20]

this was a great video! super helpful as I just realized i ordered 5v lights and a 12v PSU! oops, thankfully i have some extra pc PSUs around that I now know will do the trick! thanks so much

[@DrZzs]

Thanks! ya, I'm sure you'll find a use for that 12v PS someday too!

[@zatoichiable]

So easy to understand... thanks

[@nicklauscraig9157]

I used the 12v lights for my house which was about 80ft. It was a pain for me to run that extra set of wires. If I had to do it over I would have gone with 24v lights and probably have been okay without power injection for this length. I used a 12v to 5v voltage regulator from amazon to use the same power supply with my setup to power the wemos board. Keep up the great work on your videos!!

[@DrZzs]

Thanks!

[@Banjoba]

Excellent video.very helpful.

[@3dFirefly]

EASY SOLUTION for 12v. I installed 12v WS2811 tube LED on a my house (ranch) meaning I had 4 (5 meter) strings, I connected the 5v Arduino nano to it simply by adding a DC-DC stepdown voltage regulator to LED string itself (at end where addressable input starts), I connected one 12v power supply in middle (between string 2 & 3)

[@denistremblay4713]

Wow simple short and to the point thank you so much :-)

[@nev0076]

I got the answer thanks to you. Appreciate it sir.

[@JohnC-kc5uh]

Thanks for the helpful info

[@subbirrahman1289]

That was a superb explanation bro.. Thanks

[@DrZzs]

My pleasure

[@ashleighrowe2565]

Very cool, awesome video as always, but 2 points i would add: (Yes im a nit picking sod) most LED strings used currently are of 2 types, adressable and R/G/B channel ones. The adressable ones (more expensive, but prettier) dont change their colour based on voltage, but based on data being sent at a lower voltage from a controller The channel ones dont "change their colour based on the voltage" the same 2v to 4v forward voltage is there, but is being toggled fast (via Pulse Width Modulation, or PWM) to give the appearance of the colour being dimmer The reason lights appear to be red when given too low of a voltage is because red LEDs turn on at a lower voltage, so are the only ones to turn on, as the voltage isnt high enough to turn on the green or blue LEDs, but that isnt the same effect as the PWM from the R/G/B channels from earlier Also, the other point: PC power supplies put out 3.3v not 3v, i know thats picky as all hell, but its a commonly misspoken thing in the tech communities, and ive had people in the past ask me about a psu they thought was faulty because they had been told it was meant to put out 3v not 3.3v

[@DrZzs]

Haha. I'm happy to be nit picked by such a knowledgeable sod! You are welcome to correct my deficient knowledge anytime! Thanks!

[@terry6520]

Ashleigh - This video and your comment were both excellent. I just got two power supplies today (for two 5m 5050 rgb strips that I had), and when I hooked them up, I got exactly what you described - just red. The cause must be that I have 12v strips but 5v power supplies. Thank you for taking the time to put that out there.

[@youvebeensubbedto8009]

Working on an Arduino light array-- extremely helpful video :)))

[@edwardschmidt4963]

I have 5v led rgb light strips for my hallway setup from a motion detector. The thing is the lights take way too long to get to it's full brightness??? When they are fully bright the colors are the same.

[@shamsheralamraja]

Good one, nicely explained.

[@DrZzs]

Thanks. glad it's helpful.

[@azryder5308]

Thanks for the video

[@DeKiesel]

Do you have a recommendation for which wire to use when running an extra wire?

[@0106139]

Nice video! For my project I will need 200 LEDS with a wire length between pixels of 30cm. Will I get a significant a voltage drop if I connect 4 strings of 50 pixels parallel with 5v pixels? Or do I need 12v pixels? Thanks a lot

[@kittytoy1480]

2:55 for everyone wondering about brightness and resistance

[@germas369]

Thank you, this is so useful

[@DrZzs]

Glad it was helpful!

[@cobbinaloic]

Thanks that was helpful info

[@MegaKayShi]

Thank DrZzs for the video! I'm your big fan. Btw, I just think about using Sonoff SV to control and supply the power for LED strings. Are we able to do this?

[@DrZzs]

Thanks! I can't believe I have "fans". ;P You can totally use an SV to control LED strings. Just make sure you have a properly sized power supply. Watch the video I did with Tasmota on the D1mini. I used a string of ws2812 LEDs. Those are programmable LEDs so they do lots of colors and effects. They draw 20-60mA per LED. They have 3 wires. (+) (-) and (data). You can pass the (+) and (-) through the SV so they are switched by the relay. Then the (data) can connect to GPIO14. If you just want simple single color LEDs the SV works perfectly for them. I've got 3 of those set up at my house already. Hope that helps!

[@rokolczuk]

great video. I wish I watched it before doing the shopping :D

[@Zeenitall]

Me too

[@HelloBiffTV]

How long does the data go though? When do you need to use a signal repeater?

[@ryandtheguys1781]

very informative thanks m8

[@i3looi2]

Thank you for the explanation.. my concern was the distance. But seems my 3M will be covered by both solutions. Guess I'm going with the 12V since A) my controller can handle any range from 5v-24V and B) the 12V led strips are considerably cheaper.

[@LuckyGarageUSA]

Does voltage affect the heat output? will a 5v strip at max voltage be cooler than a 12v strip at full voltage?

[@kupua]

How can you do icicle lights?

[@billligon4005]

I'm putting these LED lights in a HO model railroad cars to light up the interiors. They run on 12v, so if I cut the length to about 1 foot solder 12v power to them from the track, will they work???

[@noahanderson2021]

Can I use a 12v amp to connect 2 5v strips?

[@stefangolubovic19999]

Can I connect 5v strip to 12v power supply?

[@P_double_H]

There goes my dream of running 12v addressable led strips on my home's fascia.

[@J_AvilaN]

Muchísimas Gracias, he aprendido mucho de usted a pesar de yo no saber inglés, saludos.

[@DrZzs]

Thanks! Gald you learned something new!

[@mettymaster6963]

Hey Doc, amazing video as usual! I have one question, if i have about 12 strips of ws2811 5V tension, can i run one parallel wire from the power supply and inject in each string or i will have to run multiple wires from the power supply because injection will have voltage drop eventually? Thanks!

[@3rdWorldGamingHD]

You will only need 1 wire for all 12 strip even if you inject each string. Just make sure you get a thick wire. 22 AWG or lower is recommended.

[@user-hh9kw3cw9y]

I just bought a 1inch diameter circuit board with leds that's 12v, can I connect the red/black wires to a usb red/black wire and them work ?

[@deadniell]

Can't believe i could learn A LOT in 6 minutes

[@seekertosecrets]

I won't need much wire to power some small LED light diodes if I use a A23 Battery. However, that might be an issue if want to use some LED strips.

[@michaelluigeehernaez9479]

May I ask would it be good to use 12v ledstring (16units) to a 12v motorcycle battery?

[@icefire5555]

To add to your point about 5v being able to directly power your micro controller. You could get a voltage step down board for a dollar or two and drop the 12v to 5v very efficiently. Also because of how you calculate Wattage. Volts*Amps=Watts. And wires melt at higher Amperages. For any longer protect you should use Higher voltage. If you push 5v through a wire, the longer it goes the harder the amperage is on the wire. Too many amps and the wire will blow like a fuse. (which comes with the risk of fires). But because the LEDs run at the same power, 12v offers almost 3x the wattage down the wire at the same amperage. (This is why telephone poles have thousands of volts on them) But I came here to see how many LEDs could make it in a 12v string and I wasn't disappointed. I enjoyed the video, Thumbs up from me!

[@DrZzs]

Great info! Thanks!

[@dale3645]

Some of the other videos (other “LED Guys”) say that the programming might have more and/or better programming with the 5V over 12V. Have you found that to be a problem with your 12V? I am mainly looking for CHRISTMAS but other holidays too. I like the idea of not using any power injection for 5 strands of String Lights.

[@user-rd3lj4gn4s]

It is the best experiment and good information for save our money! But the question remains - What to use in case when we need something brighter then ws2811/ws2812? (and not expensive). I try to create DJ facade 2x1 meter with 40x20 diodes (800pcs), but 0.3W per LED - it is to small. In AliExpress written “WS2811 with 12v it is 60mA*12v=0.6W”, but now I know that it is not true. But what to use?

[@v4v3velom58]

Can i used 12vdc 20Amp for pixel led controller T1000s?

[@kanchisundhar]

Sir Namaste , adapter 5v ok but which ams match for ws2811s led strip sir.

[@ronaldchand588]

I am a newbie in this. Correct me if Iam wrong. It makes sense that the brightness of the 5v and 12v pixels are same. If you inject power properly, I also understand the you will be able to run 2.4 times more pixels using 5v PSU than a 12vPSU as long as the power supply have the same output in terms of watts. E.g. A 300 watt 5v PSU can run 1000 pixels with multiple power injections however, a same 300 watt 12v PSU can run 416 pixels with lesser power injections. for argument sake say 0.06 amps per pixels. I am trying to make a best choice here. By the way, fantastic job with your videos..

[@jamespowis5360]

You do not need a second power supply, all you need is a buck converter or a voltage regulator to drop voltage from 12 to 5 volts. However most LED strips require a matched signal so you would need a MOSFET to raise the signal from 3.3v to 12v (this is also recommended for 5v LEDs if your controller is outputting 3.3v anyway).

[@kriss1313]

And 24 V :) I wonder if for 24v longer strips are possible withoute power ingection.. like 15m.

[@smithderek84]

How many strands of lights can be on one other?

[@unobianconero5751]

can we run a 6V smd led on 5V supply without capacitor or any other stuff? is it be lighted up? max brightness? will the current be more than on 6V supply and does is need a resistor to limit it from draining more extra amps?

[@petersjohnj]

Dr. Z. I made a huge mistake! First off I opted for off the shelf Twinkly RGB+w lights rather than just doing my own build. 2) I accidentally cut through all 3 wires about halfway through my strand. I am going to solder the cut wires but the lights aren’t marked at all so I’m not sure which one is volt+, ground, or data. How can i test to make sure I don’t damage the lights more than I already have?

[@tuphdc8779]

thank you

[@cimen9793]

If we use 5m Led/m 60 leds can we use 5v for for the right color from start to finish or still should we use 12v?

[@kittytoy1480]

Thank you

[@luv14lyf]

So 24v is no brighter than 12v? When running the extra pair of wires, is that same pair used at the end of each string or is a separate pair needed for each string? So if 5 5v strings 5 separate pairs wires for power injection?

[@sanderdemeer3783]

Goodafternoon. I have a question. I have a string of Christmas lights which have about 100 led’s. I really want to connect this string to an adapter but I really have no idea which one i need to buy. Currently the cheap Chinese light string runs on 240 volts but I really want to change that because it isn’t particularly safe😂. I’m planning to remove the entire module so that I’m only left with the LED string and I want to connect this to a 12v power supply. I can’t find anywhere what ampere value I need for this. What do you recommend me to use for this amount of led’s? As you might’ve noticed I’m not really an expert when it comes to electricity😅. I really hope you can help me out. I’m looking forward hearing from you😃. Sander

[@danelokikischdesign]

Very helpful THX!

[@DrZzs]

excellent!

[@michaelmohr7395]

Using 5V LED strips I am going pretty long like 80ft, understand I should have bought 12V+ to make it easier, do I need to inject every 5m? Can I skip? I have a 5v 60A power supply and can get good color through 3? I tried to inject at end of 3 into 4 and it makes the last strand no receive the data and the coloring is all jacked up. Appreciate your time and passion on this I bought through your links hope I helped to fund a little :) - Mike

[@sharonwasag-unknownlocatio9394]

I'm new to this. I am trying to get a small strip of RGB new-pixels to run off of a 3V Microbit. I ordered new-pixels in the mail and received 12V ones. Will these work?

[@mountain_dweller]

Excellent video! My question is about quality. All I'm wanting to do is to run about 15 ft of 5 volt warm white LEDs powered via a 5 volt USB from a 26000 mah power bank. Very simple situation. I'm just leery of buying whatever LEDs out of China from Amazon. I'm wondering if you know of a company that produces higher end LED strips of better quality. Thanks

[@sokka50]

Does the number of LEDs per meter matter? For example if I have 4-5m LED strips but with a high density of 144 LEDs/m. Would a 5V still work for that without extra feeding wires in between? I am an electrical noob, sorry :D

[@jensschroder8214]

A 12 volt power supply and a 7805 regulator. It already existed in the 1980s and turns 12 volts into 5 volts. But it simply heats 7 volts away, so only connect a small load or use a heat sink. Today, however, there are also ready-made step-down circuits.

[@eduardo_oliveira88]

Hey, could you help me? I bought a h500p mesh, a gigabyte aorus gaming 5 z370 and a masterliquid 240m lite. The thing is that my mother board has only 3 pin rgn connectors or a 5 pin rgb connectors, while the fans have 4 pin connectors. What can I do, to be able to control all the fans' colors using the rgn fusion (gigabyte Motherboard software)? I'm really lost here! Thanks for the video by the way!

[@michaelrainey-wiles7704]

I'll be connecting six 6.5' LED stripes. They are 5v strips. Will my power supply still only be 5v or would I need to up the power? Thanks!

[@kozavr]

What about 24V?

[@Moon-xc7pj]

I don't know if you still answer any of these questions but i actually bought 10 m of 12v led strip and 2 m of 5v led strips, so i been wondering is the 5v strip going to explode or burned if i plug it with the 12v 10 m led strip?

[@miguelgalvan9614]

Hello and thank you for the help on LED liChristmas

[@titustide]

I'm getting 144ct/1 meter LED's and only need to light up 1 meter. Will I be okay with only 5volts if I want to light them up at 100% brightness?

[@gurpreetsaini5148]

Hi buddy, you perfectly explained in video. I just want to make sure about my dreamlight project. I am bit confused between ws2811(12v) and ws2812b(5v), which led strip should good for my family roon ceiling perimeter about 15 meter. Basically, i prefered 5v strip bcoz its more consistent and LED's indivisually addressable, instead of 12v as set of 3leds. Please suggest me about the power supply Amps? if i go with 5V/15meter (60Leds/m ws2812b strip)...thanks

[@baughhumbuglights8860]

Calculate your power needs and get a power supply that will run at NO MORE THAN 75-80% of max rated output. For instance, if your strip needs 8A to power it, a 10A supply *should* be enough, but I would highly encourage you to get a 12-15A power supply.

[@MrJohnCatz]

I am looking to run rgbw strips under my kitchen cabinets ~ 15’. and I also want them to dim and run from phone and Alexa. What would you recommend using, and would you make a video ASAP..

[@ingy23]

If it was me I would use SK6812 and I would prob use 30LEDs per meter with a aluminium heat spreader with diffuser. It might require power injection at both ends if its 1 long run as these only run at 5V. Then just control them with a D1 mini running wled and a 10amp power supply.

[@atomicdetailsoc]

do you have a guide on how to use an old computer power supply for a controller? i have an old gateway in the garage and now i know what must be done LOL

[@DrZzs]

Something like this maybe? www.amazon.com/CHENBO-Benchtop-Computer-Breakout-Adapter/dp/B07S91NQL3?tag=drzzs0e-20

[@chepoez]

Great video!! What can I to with a 5V led string to increase the brightness? Will it work if increase the ampers? what if i use a 6V source? does the voltage only affect the color?

[@DrZzs]

Thanks! As long as you're supplying the minimum voltage, the brightness is determined by the control signal. They do draw more current when they are brighter, but you can't supply more amps to make them brighter. Just doesn't work like that. You can try using 6v, but I don't think it'll make a difference. If you're running a long string you can try adding a source of 5v to the far end of the string. It can come from the same power supply, just run a pair of wires to the far end. If you have a multi meter measure the voltage at the end of your string of lights. If it measures close to 5v then you won't gain anything by adding more. That's about all I can think of to make them brighter.

[@jjggbbjunk]

LEDs have an almost constant forward voltage drop. In a laboratory, you could vary the brightness by varying the current, but this is tricky to do. In practice, these lights increase brightness by increasing the percentage of time the LED is turned on using a process called Pulse Width Modulation. The LED is turned on and off too fast for the human eye to register, giving it an effective brightness. Each LED chip has a red, green, and blue LED. By altering the effective brightness of each of the LEDs in each little module, you can get a mix of colors. The LEDs will be as bright as they can get when they are on 100% of the time. Current while turned on is limited by electronic controls to protect the LEDs If you bump up the voltage above the maximum limit, the LEDs will be destroyed.

[@upendrachaudhari4635]

this so upto the point under 7 mins....:)

[@gunsncodes6665]

On 1:04 both power supplies have 20A. It means that the 12V supply have 12V*20A=240W and the 5V have only 5V*20A=100W. You can simply have more power with the same size of the power supply, same current and same diameter of the cables if you increase the voltage.

[@timnerenberg]

And you doesn't even need a second power supply. A simple step down converter would do it anyways, if you're using a Controller with 5V

[@andredornier]

So maybe you’re qualified to answer this question for me. If i go with the 12v would I require less amps to drive the same amount of leds vs 5v?

[@derekis1joedirt]

I just wire up the 5 volt strips in 4 series sets I figure the voltage drop on one strip is about 3 volts so 3x4=12 so they light at a decent brightness without any current protection

[@derekis1joedirt]

But this is a dirty way to do it with no controller and can damage your lights from over current

[@YutsiAion]

I'm sorry I am a noob here, I have ws2812b 5 meters led strip, and I use a 12v instead of 5v adaptor/power supply and then the led strips turned off/dead.. How should I do? is the led strip cannot be used again or I should buy a proper adaptor then the leds will turn on again?

[@DrZzs]

If you connected 12v to 5v strips and they turned off, they are most likely dead. I've done the same thing. It is possible that some of them are not burnt out, but you have to go through each one individually and test them. You'll probably have to just buy a new strip. And double check the voltage on the PS and the strips match :)

[@YutsiAion]

@@DrZzs Did you mean that I must cut the led one by one and test it through the 5v adaptor? the last time I tried to turn it on with a 5v adaptor, the leds blink several times then dead. I think I should go with 5v with 20a adapter, how about that?

[@RetroGamer75]

I have brought BTF-100-5 5v-20 dedicated to dot matrix, question is this I have another power supply Alitove 5v 60A 300W , problem is this 3.3FT or 144LEDs/m two of those need more 27 LEDs it come out 172 LEDs. Do I need Another PS? Today I brought wrong size 8 gauge it wouldn’t fit in PS. I end up returning it to Amazon. What is gauges, what size for LEDs. my strip is 3 pin 12mm, I am confuse why I need black/red wire? If power come from the wall. Thanks I like this video my English isn’t great due to deafness.

[@TheMFLAV]

Wouldn't it be helpful to inject the 12v system as well to keep it at maximum brightness? I'm defiantly doing this after this season.

[@mikewalcott]

Did you end up injecting. We are in the process of getting our lights up but still can’t decide between 5v or 12v. I will have more than 2000 lights.

[@s0l1dsnak3]

I've also noticed that the 12v strings lump 3 pixels together per data block, so you can only change the colour in strings of 3

[@Fanaleds-software]

I've read that somewhere else as well. Is that true for all of them? Because I can't see a reason not to go for 12V for my christmas lighting vs 5v. But if they're not individually, 5v it will be :(

[@sagargaikwad8900]

I want led pixel series . Price please

[@easwaran83]

I have successfully added my WIFI RGBW LED Strip to Home Assitant & It works great! Question Is it possible to get this LED Strip to syn with Music? Example: I play/ cast songs thru my google home can they sync & blink based on the music? Please let me know if this is possible? If possible how to achieve it in HA Thanks in advance.

[@DrZzs]

There is probably a way to sync with music. I’ve seen several examples. Some use expensive equipment some just tie the data line to the audio output. I’ve not tried any of them.

[@wZerox]

can i just plug in a second power adapter at the end of my led strip ? because i have a 10m one and i cant reach to the end of the stripe with my cables from my power adapter

[@wZerox]

so i have 2x 5m led strips and i just connect them together in the middle

[@regmiles]

Hello, Thanks for that info. My projects are small. So distance isn't a problem. I'm liking what I'm seeing in a 5V 8x32 pixel WS2812B 5050 RGB Flexible LED Panel Matrix Programmable Display Screen. But I'd like to run this via a battery pack. The seller recommends a 5V 15A power supply. Is there a battery pack available that can run this panel? Thanks Reg

[@DrZzs]

I'm sure you can find a battery pack, but you may need to hunt a bit. When you size the battery calculate 60 milliamps per LED x the number of hours you want the leds to run. That'll give you a number in amp-hours.

[@kaylaterbush6754]

I'm not sure if you can help but I thought I would give it a try and ask! I bought one of those LED bathroom vanity mirrors (27"×36"), that come with a strip of LED lights around the entire edge. It also has a 12vDC driver, and a touchscreen power button to turn the LEDs off and on, all the while being hardwired into my homes electrical. You can see that there is power ran to the on and off touchscreen switch by the color that it turns. However, when I push the switch on, the LEDs stay extremely dim! At times they will flash on brightly a few times and then they go back to being very dim. Any clue as to what might be wrong? We've checked wire connections and everything seems to be intact. Faulty driver perhaps?

[@DrZzs]

sounds like something is faulty. Without know much about the LEDs it's hard to say what you could try. Can you test the voltage at the LEDs? I'd guess you probably can't without tearing apart the mirror. If you can find away to provide power from a different source that might tell you that the problem is inside whatever driver/controller they're using. If they get brighter sometimes then I would assume you could do something to make them brighter more often. I'd test the voltage as close to the LEDs as you can. Then try using a different power supply to provide some voltage a little higher than what you measured. See if that makes them brighter. If not it is possible that they just aren't made to be brighter.

[@PantherJagger]

This was great, but you did mention a part that is hard to comprehend about the 12V Leds. You said your controller "Arduino Mega" needs a separate 5V Power supply after the code in uploaded. So, you are saying Do Not use a feed from the 12V to power the Arduino through the Power Port this will be bad?

[@3dFirefly]

12v input to Arduino is too high, simple solution is add a DC-DC step down regulator , small PCB with an adjustable pot on it.

[@LuckyLuke-123]

Hi, has anyone an idea witch cable i could use to extend the data wire from the Wemos to the LED´s. I would like to install the wemos and the power supply in the attic. But i have a 1m distance. I try an cat6 kabel 2 Wires from them. But i got differend colours. best regards Jan

[@cityleader88]

J V ever figure this out.

[@Index-o1234]

Question.....I have a mobil progect I am working on it doesnt require more then 2 sets of 3ft of WS3812B Led lights. I ordered a 5V USB Controller WS2812 WS2812B LED Controller With Remote RF Wireless Control 3Pin USB 5V For WS2812 WS2812B LED Strip Driver to run of a portable battery bank of 5w 1.0A / 5V 1.8A.....My question is....will it work? Or is something missing? Im awaiting some of the parts to arrive but it's 3 months out so I thought I should ask someone whom really knows in the event I need to purchase anything else to make it work. I don't want to tap into the electronic device it is mounted to because of the dismanteling, soldering and possable fire hazard issues it may cause it is stored in a household and of course all those electronic products give off toxic smoke if it catches fire so I want to avoid that nitemare and just run everything off a battery bank. Any helpfull guildance would be appreciated. I am a firm believer in asking knowledge people whom know more then myself on subjects I am not familar with. Thank you