Instructables: question - leds Fri, 27 May 2016 17:38:25 PDT BLOX v1.01 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 ...
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
how to find what causes a LED strip ws2812 to work partially ? TalT3 HI All, i having trouble with my ambient light project. though it worked fine for a few weeks, all of a sudden less than half of the strip (the closer to PSU half) has been act strange and than stop to work. the rest of the strip work fine and still responsive. how do i discover which led is the cu...
By: TalT3

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Wed, 3 Feb 2016 15:04:05 PST
How to power 12V LED Strip with 5V USB via Computer Mouse Controller? gonedrinkin Hello, I'm a electrical idiot, really appreciate it if you could explain in layman terms. I want to use the mouse electrical board, to power and control colours of my LED strip. This is for the chassis and random lighting. Note that I HAVE to use the mouse circuit board to control LED strip colours ...
By: gonedrinkin

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Tue, 2 Feb 2016 12:19:07 PST
Need help on led circuitry? uma111 Hi everyone!  I have some 10W LED chip fowardcurrent 1050mA 9-12v I also have 12V 72W with 6.2A output driver. My question is what is the ideal amount of LED to fully utilize my power supply with optimum brightness? Pair up in Series or Parallel? Resistor needed? Sorry for my noobness. 
By: uma111

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Sat, 23 Jan 2016 02:38:40 PST
Please help to select a power source for 100W LED? AlekhK I want to make a spotlight using 100W LED powered by a 2200mAh LiPo. I understand I need a power booster for this. Please suggest one of the correct specification. The LED:
By: AlekhK

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Thu, 14 Jan 2016 22:13:07 PST
Can I power a LED array with LiPo? AlekhK I want to power an led array of 10W LEDs connected in parallel with a LiPo. They are rated 12V and 1050A. So thought of connecting them to 5200mAh LiPo battery so that they all will get 12V and each will get less than 1050A. Can I do like this? Please suggest a cheap method to do this. Thanks Edit...
By: AlekhK

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Wed, 13 Jan 2016 06:02:13 PST
Ho do I pick an LED driver? iron_cupcakes I bought a few cree XP-E LEDs and I'm very confused as to what drivers I should buy. This is my first electronic project so I'm a bit confused. I do know that for high powered LEDs, constant current is the only way to go but I have no idea how much I need. These are the LEDs I bought: http://www.eba...
By: iron_cupcakes

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Tue, 12 Jan 2016 11:07:11 PST
Make image and project it? Chamburn Hello everyone, I wanted for a while to make an image so that I can project but don't really know how to do it until recently I got this small like flashlight that actually projects an image.  Does anyone knows how to do it and the parts needed to build it. thanks
By: Chamburn

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Thu, 31 Dec 2015 12:07:29 PST
how to add Instructables RSS feeds to Yahoo home page? foxwoodfarm A year or so ago I added RSS feeds from Instructables to my Yahoo home page. It was groups like LEDS or Shop. I can't figure out how to do it now.  Any help will be appreciated.
By: foxwoodfarm

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Thu, 31 Dec 2015 11:56:54 PST
how can I make a 12v led driver? Soumojit Hey I want to make a 9-12v 300mA  led driver with out transformer from 220V AC mains .  I want to make the driver cheap . I want to light up a single 12v led .  See the image below
By: Soumojit

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Thu, 31 Dec 2015 07:14:42 PST
Push button controlling different light combinations? Kruegem You know how with some flash lights and such, you click the button and one LED turns on, then you press it again and more turn on. How would I get a result similar to that? What I'm trying to do is pressing a N/O button once and LED 1 turns on then clicking it again and LED 1 turns off while LED 2 t...
By: Kruegem

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Thu, 10 Dec 2015 20:02:04 PST
Can someone give me any Ideas or thoughts on how to make Led Iluminated books like these? Shinigami3y3s I recently came across an article about these books that were illuminated by LED's at this art exhibit. I clicked the link and found a project i would like to attempt to try, and maybe you guys would to. Im not sure what would be the best way to duplicate what Ive seen. SO who better to ask then you...
By: Shinigami3y3s

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Tue, 8 Dec 2015 23:18:49 PST
quickest glue? designmore2 quick glue led wires into under cabinet corners   what to use
By: designmore2

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Thu, 19 Nov 2015 13:04:04 PST
Choose Your Favorite Picture For My Instructable? Yonatan24 I'm working right now on a HUGE project And, I need your help for choosing the best picture for my Instructable If you're interested, This Instructable is going to be on how-to-make a: 200 WATT Variable Spectrum LED Light Panel, Which I will use for taking pictures for my 'Ibles. And for some re...
By: Yonatan24

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Wed, 18 Nov 2015 05:17:59 PST
Powering LED strips that are cut into pieces? Pinguino72 I ordered an LED strip off Ebay and it came with a AC/DC adapter 12v 5A It powers the 5 meter bright white LED strip great. However, if I cat this strip into say 3,4 or 5 pieces. I need to know what I need to buy to power each of these pieces.  My understanding is that the adapter that came with the...
By: Pinguino72

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Thu, 12 Nov 2015 19:51:36 PST
Colored Lights- How do colored led lights work and what do they emit? Potapids I'm doing an experiment by growing plants under colored led lights, so do led lights emit specifically one color. For example does a red led light emit only wavelengths of light that are red and no others. I want to make sure that only one color of light is existent to get accurate results. I hope t...
By: Potapids

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Sun, 8 Nov 2015 07:32:37 PST
Resistor Value for LED series? swatma I am new to electronics, just started it as a hobby, and tried my hands to make a LED Series. As I am not aware of the exact calculations to figure out the resistor value, I am facing problems - resistor is getting burnt. I am just seeing a led series bought from the market and trying to make anothe...
By: swatma

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Thu, 5 Nov 2015 18:01:02 PST
would like to know where to wire the 10k linear potentiometer to the Lm317 lex76 I'm trying to build a Led Constant Current driver for my led grow plants but I'm stuck on where i would solder the 10k linear potentiomter on the LM317 By the way this is what I'm using 10k linear pot 1kohms fix resister 2.2ohms resister LM317 can someone please draw in color code where i would so...
By: lex76

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Thu, 5 Nov 2015 13:25:15 PST
how I make a led rain drop light ? Soumojit Hi guys,  I want to make a led rain drop lights like this---   So please help me and tell me how can I make this lights. I need the circuit of the light.  It will oparated in 240V AC mains. Thank you
By: Soumojit

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Mon, 26 Oct 2015 02:36:20 PDT
How do you wire a small amount (8-12) LED's, to be run off a small battery and with a switch? In Laymens terms if pos? RyanW49 Hi, I'm framing a piece of art with a deep frame and would like to put between 8 and 12 LED's in the frame. I will be running the wires and  hiding the battery and switch in a rebate around the outside of the frame. i will drill small holes in the frame every 2-3 inches through the frame for the LED...
By: RyanW49

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Sun, 25 Oct 2015 14:09:24 PDT
Replace LED Music Sound Control Microfone with RCA input. Diagram Request. RaptorHunter Hello I bought  "Music Wireless IR Controller 12V 6A 20 Keys IR Remote Controller for 3014 3528 5050 5630 RGB LED Strip lights Mini Controller", I want it to replace the microphone with an RCA coming from my Head unit, the signal sensitivity is around 4V. Please make a wiring diagram and specify...
By: RaptorHunter

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Wed, 21 Oct 2015 03:10:41 PDT
How can I power this 3watt LED bulb / parts from it? Bpolczyn Hello, I have some color changing LED light bulbs. They are 3 watts. I have one that popped in the socket so I took it apart. I have a flying ghost decoration I would like to light up. Even if it's just rigging the single led itself into the ghost, or as much as creating a battery pack that will ru...
By: Bpolczyn

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Sat, 10 Oct 2015 15:23:11 PDT
Old LED ratings? Youtalken2me I bought a large box of what appears to be New Old Stock (NOS) of electrical parts at a garage sale.  In one box was a bunch of orange LED's and a piece of paper with the following written on it. Ir=6nA Uf=1.92V C=1pF Can anyone decode this for me? Duane
By: Youtalken2me

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Thu, 8 Oct 2015 15:31:20 PDT
Is there a LED with adjustable Wavelength and color? Dasaradh M S I just need a LED that can give me desired color and wavelength (in nm). I just googled but found nothing. Hope I will find one. Thanks in advance.
By: Dasaradh M S

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Sun, 13 Sep 2015 01:32:34 PDT
LED USB light cant run with 5V 1A usb charging adapter? supertechey Hello Friends, I cant understand why USB LED not lit up.  when I insert in to PC usb port, it runs nicely. but when I insert in usb charging adapter and try to run. it cant. does it require few mili amps? cant it take few mili amps form 1Amp?  
By: supertechey

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Wed, 9 Sep 2015 10:43:29 PDT
leds connected in parallel to a 12 volt battery? How do I do it? joan1951 I have 12 led light fixtures - each one has 24 (5mm)  leds in the head.  O/P:DC 10.5 v, 0.5 a written on the wall plug transformer.  I want to cut off the transformer and use them on a 12 volt battery.  Is this possible?  Do I need the resistor in this line?  Can I hook all 12 to a Die Hard?  Please...
By: joan1951

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Thu, 3 Sep 2015 18:15:13 PDT
Strangely behaving circuit, why? amdlo I have a circuit with a Lithium battery driving 12 same LEDs in a parallel setup. The circuit looks like this: (also visible at the bottom of the question) The battery is charged to 3.8V and the LEDs have all around 2.73 forward voltage and they're rated for 20mA. Acc...
By: amdlo

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Sun, 16 Aug 2015 11:54:45 PDT
Changing led colors using pressure switch. MikeL39 OK just to be up front i have no idea on how to do this so i would need the full story. i do know how to read schematics and can solder and most of the basic stuff. what i am looking to do is install led lights under my hood of my car in each of the snorkels that receive air from the outside. basica...
By: MikeL39

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Tue, 11 Aug 2015 08:35:55 PDT
Which is better, series or parallel for COB LED? JessaY1 What set up will minimize losses for better illuminance?thanks :)
By: JessaY1

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Fri, 31 Jul 2015 10:58:06 PDT
Can a ring illuminated 5A 250VAC pilot lamp (6v led lighted switch) control a mini pc fan using a 9v battery ? JackH19 The fan is for the combustion chamber of a spud gun and comes with an internal toggle switch but I would like to use the external lighted switch. Suggestions are appreciated, Thanks
By: JackH19

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Sun, 26 Jul 2015 22:28:17 PDT
Scrolling message of Welcome for first day of school? jwhit Every year on the first day of school we go outside and hold up a sign with our names on it to gather up our new students.  I would very much like to learn how to do this electronically using some type of LED display. Never done anything like this so it would have to be pretty simple at least to s...
By: jwhit

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Sun, 26 Jul 2015 08:18:57 PDT
Retrofit bug zapper with LED's, Would the high voltage be a problem? Vyger I have a large and good working bug zapper that just had the UV florescent tubes burn out. After pricing out new tubes. which are expensive, it occurred to me to try using UV LED's in place of the tubes. Physically there would be no problem. I can use a 3 inch PVC pipe and wrap the LED string around...
By: Vyger

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Wed, 22 Jul 2015 00:42:57 PDT
LEDs on a costume? TishaC I have never used LEDs on a costume before, my planned costume will have approximately 50 separate strands of lights on it, in two different colors.  The way the costume is designed, there is simply no place to hide 50 battery packs (20, maybe but not 50), is there a way to attach several strands o...
By: TishaC

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Fri, 10 Jul 2015 19:49:24 PDT
Found amazing cheap RGB led boards, need help changing out 3 individual LEDS for a single RGB LED? Zebrahski I have been looking for a cheap board to control normal 4 pin RGB LEDS, and I finally found one! However, this board has 3 individual LEDS a red, green, and blue LED and I need to change them to have a single RGB LED. This board has 7 colors, red, green, blue, yellow, aqua, purple, and white. The pr...
By: Zebrahski

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Sun, 5 Jul 2015 23:26:36 PDT
HELP: Blinking light circuit ( Music Synced) vmahajan3 Hi I'm trying to build a music synced blinking light circuit. However I AM A NOOB. I don't know almost anything about electronics and stuff. But i'll manage. So the first problem is that I cannot get tip31 or any tip transistors in the market. All I have is BC547 NPN transistor or 2N2222, General ...
By: vmahajan3

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Tue, 30 Jun 2015 23:54:32 PDT
Best way to make LEDs blink chorn1 I'm looking to make an LED strip blink on a switch. wondering which way would be the best way build the circuit. Open to opinions, was looking at a 555 timer, dual transistor and relay circuits. Was thinking of using the relay or dual transistor for the circuit for simplicity and size, am going to u...
By: chorn1

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Sun, 21 Jun 2015 01:28:20 PDT
Max length for running leds over cat5e? kjsrocks If i run 2 leds over cat5e cable how far away from the Arduino can I get? Thanks, Kade
By: kjsrocks

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Fri, 12 Jun 2015 12:47:35 PDT
how to connect 5MM RGB led to connect with 12v 6A controller? YOG PATEL8186 Dear all,  i am bit confused and want your expert help for following matter. 1. I have 12v 6A (2A X3 each= 6A)  RGB contoller  : as this link

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Thu, 11 Jun 2015 22:23:13 PDT
Is it possible to replace 4 AC adapters with one larger one? Chiefchaz I'm trying to link 4 strands of LED lights together and use one power source.  Currently each strand requires a model: DAV-3612 AC Adapter.  I would like to connect all four strands and use only one adapter, but would need a more powerful adapter. . . . I think.
By: Chiefchaz

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Sat, 6 Jun 2015 20:56:48 PDT
How to wire and power LEDS with a constant current driver? rachl009 I want to light up 6 leds, one each of red, orange, yellow, green, blue, purple.   The specs for red, orange, and yellow are: 20 mA, 2 V.  Green, blue purple are 20 mA, 3 V. I ordered these constant current drivers 20mA (+/- 3) Constan...
By: rachl009

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Mon, 1 Jun 2015 17:39:43 PDT