Instructables: question - leds Thu, 27 Apr 2017 02:21:52 PDT BLOX v1.01 Led strip section not working? TallinW I got a Led strip and a section of it doesnt light up blue but it lights up green and red. Also any variant that requires blue for a colour shows as that variant, EG Cyan on the one half but green on the side that does not show blue and another example, Purple on the one half but red on the side tha...
By: TallinW

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Fri, 7 Apr 2017 00:55:31 PDT
Can I put Color-changing multi-color RGB LEDs in series?? BarryS78 I need to run a bunch of slow-changing multicolor off of 12vdc.  The LEDs are each rated 2.5-3.4V 20ma.  I'd like to keep efficiency up by reducing the number of series current-limiting resistors and the voltage across them.  So...  Can you put 3 multi-colored LEDs in series with a current limiting...
By: BarryS78

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Tue, 4 Apr 2017 18:32:31 PDT
Random raising and lowering led bars like a graphic equalizer?? urkelbot666 Hello! I'm interested in doing a project which would just involve having a series of mounted LED bars, probably between 8 and 12 LEDs per bar, which would light up to random heights from low (bottom) to high (top) repeatedly. I want to create the effect of a graphic equalizer on a larger scale, as a...
By: urkelbot666

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Sun, 26 Mar 2017 19:35:37 PDT
How to connect 10W led + 12v Led Driver directly onto Arduino? YuT6 Hello there, can anyone give me an advice on connecting an 10W led + 12 volt drive to an Arduino Uno? it works but when i tried to connect to Uno it doesn't work anymore. Thankyou
By: YuT6

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Sun, 19 Mar 2017 03:36:47 PDT
my 9v batter is overheating on the LEDs (This was a DIY project I'm worried I messed up somewhere)? MeganB126 Hello guys, I'm pretty new to LED work and this might seem like a really round about process to how I did this but I'm going to explain the whole thing and hopefully find a solution to my problem! First off I bought these Fairy Lights:
By: MeganB126

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Thu, 9 Mar 2017 21:44:53 PST
How to connect LED Strip to USB cable? YosukeH I am currently making an Art assignment for my class. I am trying to crete art using light and I decided to use LED Strip instead of other lamp. I bought a 1 meter long for a prototype before installing the real one. I am cutting the LED for about 10 cm long. Now, how do I connect the rest of the LE...
By: YosukeH

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Wed, 8 Mar 2017 06:51:02 PST
Motion sensing led strip with dimming on/off? JeffB156 Hello, I'm making a coat rack that will be hung in a poorly lit hallway. The coat rack will have a basic mountain shape to it and I'd like to put some LEDs behind the mountains that fade on when I approach and fade off after a minute or so. Is this possible?  I'm brand new at this but I'm not afra...
By: JeffB156

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Thu, 2 Mar 2017 10:31:41 PST
10w led on motorcycle SamaelsL I have 3 10w led lights on my motorcycle, but they burning out in time. I guess its because 12v/11A sums up way beyond 10w? Is there some  easy solution, like resistors or diodes ?
By: SamaelsL

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Sun, 26 Feb 2017 12:35:31 PST
Procedure to getting Voltage and current of an LED without knowing ANYTHING else? MilesT9 Good day good people. I got batches upon batches of various surface mount and dip leds. Not a single god damn seller wrote the specs on neither the website, nor the package and there are so many that I can't tell which one's from who. Regardless, however the ridiculously low price you get these thin...
By: MilesT9

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Thu, 16 Feb 2017 05:40:33 PST
how to fix permanently unstable and stutter LEDs strip 2812b in my Arduino ambilight project? TalT4 why after several weeks with my LED strip (2812b) some LEDs tends to stuck or stutter and with them the rest of the strip (up the din stream)? This mostly happens under white light. And after several weeks of use.  It seems like I never can enjoy them without worries of led slaving... You replace th...
By: TalT4

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Mon, 23 Jan 2017 12:22:32 PST
can i use TIP41C instead of TIP31C in sync audio with led strips? MohammedZ3 i tried to make make audio sync with leds strips but, unfortunately the area where i tried to purchase transistors TIP31C was not available. And store keeper suggested you can use TIP41C which is similar properties....please help me out,,, And thanks in advance.
By: MohammedZ3

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Fri, 20 Jan 2017 06:35:29 PST
Solar LED 2835 strip with rechargeable battery, controller and night sensor? Ti6  Needing help with a solar set up to recharge and power a small led strip with 2835 LEDs. I need a small strip of bright LEDs to light up a address block during the night and it is in a rock column.  I want the set up to be as visually minimal as possible.  My plan is to have a solar panel chargi...
By: Ti6

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Thu, 19 Jan 2017 10:41:20 PST
Rgb led strip music controller? Soumojit Hey I got  an analog rgb led strip and I want to control it with arduino as the music on my pc. I see in internet that some people do it with possessing and some use the audio cable. Please any one help me with circuit and code (I am noob at codeing!) to make a music control rgb  led strip.
By: Soumojit

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Wed, 28 Dec 2016 00:37:30 PST
led strip brightnes reduce with resistor? turbiny so i have rgb led strips in my car with rf controller and i wanna add 5cm(3led) but with reduced brightnes while driving and when i open the door to shine ass set from the controller most of the time 100%, so the questrion is can i connect 2 wires onee thru a resistor and the other thru a switch to ...
By: turbiny

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Fri, 23 Dec 2016 10:20:09 PST
I need to put up 3 Rgb led light strips around my room, How would i go and do that? NathanielK9 I need to power 3 Rgb led light strips that would be all controlled and powered on one controller. These Rgb lights strips are here. What would i need to go and buy a right power supply and controller for a length of 49.2Ft or 15M? I drew up a sketchup of what the room looks like. I was thinking of ...
By: NathanielK9

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Thu, 22 Dec 2016 13:01:30 PST
Yet another LED Driver question? nabis420 Fellow instructa-people,  I have aquired a couple of 20w LED Drivers, which are mains powered.  They are branded "Inples 100", each one has 6 outputs at 10.5v I am looking to use 3w LEDs with the driver, but I'm having problems finding how many leds I can use on each channel. The forward voltage...
By: nabis420

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Mon, 19 Dec 2016 15:40:39 PST
Led color control w rotary switch? mckeephoto I am working on a project to rewire an old industry hair dryer into a funky floor lamp. It has a cool panel on the back that would fit some kind of a rotary switch.  I would like to use an existing product or products to emit blue light and yellow light from the bell of the dryer. The rotary switch...
By: mckeephoto

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Sat, 10 Dec 2016 08:36:21 PST
Why doesn't my RF inline dimmer activate LED strips when powered by a car battery? NickD163 I built a 12VDC, 2A lighting system in my truck topper to run off my engine's battery and it works fine unless I add an inline RF dimmer and then it doesn't respond. When the same system is powered by a separate transformer that receives 120VAC and provides 12VDC, 3A the RF dimmer works fine. Any id...
By: NickD163

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Wed, 7 Dec 2016 19:13:18 PST
How do I wire and power a simple LED circuit? JackR124 I'm trying to create a sign with letters made of 40 10mm LED bulbs. They come pre-wired with individual resistors and only say they require 9v-12v at 20mA. Here is a link: I would like to wire th...
By: JackR124

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Sun, 4 Dec 2016 12:22:08 PST
Question about Resistors rdlockrey I have am writing an arduino sketch for a mini traffic light projects that will require both 220Ω & 330Ω resistors, I ordered them, the problem is that the resistors I received don't add up when looking at the bands. this is the color band  ORANGE+ORANGE+BLACK+ORANGE+BROWN 3 -------------3-------...
By: rdlockrey

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Tue, 22 Nov 2016 16:17:21 PST
A better search engine and learning more about bi-color leds? jgmdpm1057 You have nothing on using bi-colored, 3 lead or 2 lead, leds.  Is this because you don't have any info or your search engine is lacking? To me a search engine should search for the item your looking for with the request "ONLY".  For example, if I'm looking for info or projects and am looking for "bi...
By: jgmdpm1057

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Wed, 16 Nov 2016 06:19:42 PST
Double flash led circuit? EthanH48
By: EthanH48

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Thu, 27 Oct 2016 17:59:16 PDT
How to power LED Strips in my car via USB? TimC181 Hi guys, I've always wanted to make my car (my parents car :'c ) a little bit more fun, It's a 10/11 year old ford fiesta without Bluetooth/USB. Here's what I would like to do, just wondering if anybody can see any problems with this. I know very little about power or how electronics work. I want ...
By: TimC181

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Thu, 27 Oct 2016 07:51:20 PDT
Why do yellow (amber) & lime green LEDs suck? -max- In my experience, I have dealt with many colors of LEDs, and from what it seems, red, neon green, and blue LEDs tend to be pretty good at producing light as well as surviving abuse. They also tend to require the least amount of current. However, I have found that almost all the the classic lime gree...
By: -max-

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Thu, 20 Oct 2016 21:22:57 PDT
How can I create a system where the LED flickers when the person touches it (Kinda like lightning effect) Grandplan I'm doing a project where I'm trying to mimic raining effects and I'm wondering how can I create a lightning effect by touch sensor. I need it to be small and light cause I'm trying to make it portable. I'm kinda new to electronics and so far have only built a basic LED circuit. Any help please?
By: Grandplan

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Sat, 8 Oct 2016 07:37:44 PDT
Why does my led strip only light if I push the middle led of every section ? MagdaleneK1 So basically I have a 3528 12v led strip (monochrome blue not rgb) ,I made a portable power supply of two AA 6V battery boxes which I connected and then I connected those with the cables connected to the led strip ,I tried this with soldered cables on the leds ,clip on connectors to just 3 leds then...
By: MagdaleneK1

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Fri, 23 Sep 2016 05:28:22 PDT
Mass production and led's and arduinos? stevecinstrfme I'm interested in making something that will have several led's that I would like to flash randomly and some flashing slowly, some fast, etc.. Some with the "fade in/ fade out" kinda deal (sorry, don't know the terminology). Anyway, I'm in the process of learning all about the arduino and I'm just b...
By: stevecinstrfme

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Sun, 11 Sep 2016 06:01:14 PDT
Powering 60 Neopixels and an arduino? bigjohn412 I am in need of powering a 30 LED Neopixel strip and an arduino with the smallest sized (as in dimensions of the physical battery) battery possible. The arduino I am still trying to find because of the limited space I have to work with. I was thinking of the Gemma but not positive. I am in need of i...
By: bigjohn412

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Sun, 4 Sep 2016 17:33:14 PDT
LED Strip connected to car 12v port and isn't lighting up? marcelrees So i bought an LED strip which was rated at 12V, i connected it to the wall and they lit up, i then got a car charger which was 12V and wired it up, and they don't light up. The car charger itself has its indicator LED glowing and i checked with a voltmeter that it was supplying the 12V. I cannot se...
By: marcelrees

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Tue, 16 Aug 2016 20:47:31 PDT
RGB Connection - to - single color led strip HelderN2 Hello, I have done some research and didn't find answer to my question. I have a sound sensitive coontroller with RGB conections, but I have led strip with a single color, so I has + / - wires. How to I connect the strips to controller? Regards
By: HelderN2

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Fri, 12 Aug 2016 07:00:48 PDT
Cool White 5630 LED Strip starts flashing/ cutting out after solder? ChrisB588 Hi, I'm trying to make an LED studio light out of a 5630 5m led strip. I tested the strip before cutting and it works perfectly. I've the strip into lenghts of 6 sections of 3 leds, placing them parallel. I'm soldering all the positive nodes to a wire on the left side and the negatives to a wire on ...
By: ChrisB588

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Wed, 10 Aug 2016 12:36:48 PDT
how to make 12v battery from 18650 li ion batteries?ån-18650-li-ion-batterie/ Cr77777 Hi, I have this led strip Working Voltage is 12VDC. Working Current/meter: 0.8-1A the strip is 5 meter. 18650 x4 = 14.4 v 18650 x3 =10.8 v How can I ma...
By: Cr77777

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Fri, 5 Aug 2016 11:37:44 PDT
sync bass with subwoofer HelderN2 Hello, I thing this is the right /r/ to ask this. I have a HTiB and I want to make 2 led strips with ~6 meters blink with bass. I have done some tests with my old subwoofer (logitech z5500) and I noticed that as the bass goes deeper, I got distorsions... I have read that we can use an amp to store ...
By: HelderN2

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Mon, 25 Jul 2016 09:15:31 PDT
Transformer less 6v smd led driver circuit? Soumojit Hi, I have buy a 6V smd led board which have12leds. Now I what to make a cheap transformer less power supply that light it in 220v ac  mains. I try with a 474k capacitor with 100k resistor parallel and 4 dioads and  a 1k resistor connect to the positive dc output . It works but the light of led is t...
By: Soumojit

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Sat, 16 Jul 2016 00:21:10 PDT
If i cut this 30cm LED strip that written 12V, how much will voltage will iit be per 2 LED's? miraheng 1) can i use 9V battery to it?  2} Its a long strip that written 12v every 2 led's, so if i cut, How much Voltage should i apply to it?
By: miraheng

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Wed, 29 Jun 2016 10:08:03 PDT
starting circuit for programmable sequence, for flashing LED? bmcewen Hi- I am interested in suggestions for starting points to build a programable flashing LED.  The intervals of dark/light should be configurable, kind of like morse code.  But not subject to what I recall as requirements for Morse- dashes are 2x as long as dots, or something- duration will vary for ...
By: bmcewen

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Wed, 22 Jun 2016 18:25:24 PDT
How long can a 9v battery power a few leds? AsherB4 Hi I am trying to make a display of my polymer clay angry birds in our local fair and I wanted to add a few little leds on it, the problem is they need to stay on constantly for at least 5 days  I am trying to figure out how long a 9v battery would power about 6-8 leds. is there a better way to do...
By: AsherB4

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Thu, 16 Jun 2016 12:52:07 PDT
what i fill in 'Link to Team website' in Makerspace Contest 2016 - Team Entry form? pankajchauahan we (our team) decided to participate in this contest but we stuck while filling the entry form.  i want ask you that whether they want us to make a team website or something else?  please solve our doubt regarding this...
By: pankajchauahan

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Fri, 3 Jun 2016 09:13:28 PDT
What Do I Need To Change In Order To Run This Circuit With a Button Cell and a Momentary Switch? Numbuh1Nerd I'm trying to do a modification to this project here. I need to replace the 9v battery with a smaller one, probably a button cell or similar, and the slide switch with a momentary one. This is my first real electronics project, so I'm not sure how those changes might affect the rest of the component...
By: Numbuh1Nerd

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Thu, 2 Jun 2016 11:26:27 PDT
Can I get help making a simple circuit for two LEDs? knex.gun.builder I can't find a circuit online or get any of my experimental circuits to work. I have been trying circuits with transistors - specifically the 2n3904. All I want to do is make a circuit that has two LEDs and any kind of switch. I want one LED to always be on. Then, once the button is pressed, the fi...
By: knex.gun.builder

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Wed, 25 May 2016 17:26:33 PDT
how to power 9 10 watt leds from a automotive battery? johnnytyler I am building a under water array using 9pcs  10 watt green leds, and will be powering from a automotive battery. the led data is. 10 watt green 900 lumens voltage dc 9-10.8  current 900mA integrated approach 3 and 3 My current build has them in parallel due to not wanting to lose all leds if one fa...
By: johnnytyler

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Mon, 9 May 2016 10:23:16 PDT
which power supply rating do I use for my diy led light panel? tinat36 I'm building a led light panel using 24 x 18W SMD 5630 72LED Rigid Light Strip Tube Bar Lamp Bright White 12V 1800LM connected in parallel so whats the power supply rating  Specifications for each lights strip: 1. Key Features: LED Light 2. Light Source: 72 LED 3.LED Size: SMD 5630 4. Luminous Flux:...
By: tinat36

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Tue, 3 May 2016 08:48:34 PDT
How to drive a 10W RGB LED with 12v PWM? joearkay Hi all, I'd like to drive a 10W RGB LED, much like these ones found in the RGB LED floodlights. I want to strip all of the internal circuitry and control it with 12V PWM signals such as the ones that come from these controllers.  They all seem to provide around 4A/channel. My understanding is th...
By: joearkay

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Sat, 30 Apr 2016 06:31:41 PDT
Help with a simple led circuit? Jon_uk Hi all, id id like to help my son with a simple school project. He wants to mod a mouse by replacing the cover with a clear cover and adding an rgb led that he can switch with a push switch, powered from the 5v usb.  So I need a little circuit to turn on, and switch colours on an rgb led via push ...
By: Jon_uk

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Tue, 19 Apr 2016 13:37:58 PDT
Can I power a 5v LED Strip with a USB cable? MarcosR38 I have an old USB cable from a phone charger and a 1,50 m long 5v LED strip. I've been doing some research and I figured out that the USB cable contains 4 little cables inside: 2 for data exchange and 2 for power.  What I want to achieve is a nice and soft backlight for my TV and I don't want to was...
By: MarcosR38

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Sat, 16 Apr 2016 10:23:14 PDT
NSD Powerball neon series custom LED's? slimydogballs3442 Has anyone had a go at soldering their own colour leds into those neon powerballs. from the looks of it, it seems like a bit of a big job...
By: slimydogballs3442

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Thu, 31 Mar 2016 21:59:01 PDT
Good place to get really good LEDs? -max- I have recently discovered that CREE has released some new XHP class LEDs awhile ago, and compared the the XML line that I have been a fan of, these ones seem to blow those out of the water. However, they are still somewhat $$$, although not too much. I would like to get my grubby evil hands on a fe...
By: -max-

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Tue, 29 Mar 2016 07:59:54 PDT
Help converting a Greenlite LED light Bulb to DC power? MrTechGuy I have a GreenLite LED bulb that I took apart and cannot for the life of me figure out how to power it via DC without blowing it up. There are 21 LED's on an Aluminium plate, after mapping out the traces there are 3 series of 7 LED's with it running at 43.9-44.0 Volts. So I figure thats 6.2V per LE...
By: MrTechGuy

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Tue, 1 Mar 2016 16:15:49 PST
Can I power a 5M 5050 RGB led strip with a pc PSU? FlorianS20 I would love to control an RGB led strip with an Arduino, it would look great on my desk. I would love to know wether I could power this strip using an old desktop powersupply. LED strip:
By: FlorianS20

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Mon, 29 Feb 2016 09:08:41 PST
How Bright is a 112 Lm/W LED? Boba Jett Hello, I am on a mission to find a very very bright led preferably in red. I have seen lots of bulbs with ranging prices but don't understand how bright they are. One led I have seen is the Luxeon Rebel LXM5-PD01 which comes in red and is 112 Lm/W, I understand that it means 112 lumens per watt but ...
By: Boba Jett

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Fri, 5 Feb 2016 02:18:35 PST