Instructables: question - leds Sat, 1 Nov 2014 03:37:25 PDT BLOX v1.01 single led light bulbs? ron.stone.733 I have some single led light bulbs. I want to string 113 of them. they're 1.5 watts each and 12dcv. what transformer and gauge of wire should I use? G4 socket. there's 24 led's in each light. they're pretty small.
By: ron.stone.733

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Fri, 31 Oct 2014 06:34:44 PDT
Matching 700mA constant current driver to 20mA LEDs? michael.pokorny.54 Hello all: Ultimately I'm trying to drive upwards of 100 3mm white LEDs in an art project with dimming and a connection to 120v AC power (this is for a chandelier). I've been playing around with some constant current IC driver like the Supertex CL2 as well as 5 and 12v power supplies but I've been...
By: michael.pokorny.54

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Wed, 29 Oct 2014 20:04:11 PDT
3v led strip? Algy I need to source a large quantity of light sources for interior emergency use. Needs to be a short, 300mm multi led light strip powered by a 3 v watch battery, with a mercury type position switch. Any ideas  where I could have them made?
By: Algy

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Tue, 28 Oct 2014 00:36:09 PDT
Help me. I bought a lamp Led 100w but the film that covers the bulb came very dirty. What I can do? logoaki There's something I can do to clean it without spoiling? I think if I use it so I will lose a lot of brightness.
By: logoaki

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Fri, 24 Oct 2014 11:53:56 PDT
How to make a 4 LED switch anthonyv4 So I am making a deadmau5 helmet and i want to add 4 LEDs to the inside. I was wondering how i would set this up and what kind of power supply I would need such as 4AA batteries or that. The LEDs need to be able to be flipped off by an SPST switch and they should be able to run for around 3 hours be...
By: anthonyv4

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Sun, 19 Oct 2014 09:19:26 PDT
How do I connect an RGB LED Strip to an Arduino DMX controller? StumpChunkman I've been working on a project for a few months now and it's getting to the point where people are suggesting DMX as a method to control our RGB LED Strips. The LED Strip I have is 60ppm (LEDs per meter), and each LED is individually addressable. It runs on 5VDC. In the attached images you can see...
By: StumpChunkman

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Tue, 14 Oct 2014 14:44:44 PDT
How many LEDs rated at 5V can I use on a 6 Watt Radio Amp? javierdiaz4 I there, I have a 6 watt radio amp that if I used the Voltmeter correctly is only really using 1.3 watts at it's highest volume on the busiest song.  I want to add LED lights to the dial and I'm wondering how many can I use?  I purchased LED lights rated to a max of 6V and the engineer told me that ...
By: javierdiaz4

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Mon, 29 Sep 2014 20:32:45 PDT
Is my LED gas mask idea possible with the 'Getting Started with Arduino Kit'? Doitourselves I'm making a gas mask for my Resident Evil Umbrella Soldier Costume for Halloween but stuck at the LED part. I have the 'Getting Started with Arduino Kit' (seen here:
By: Doitourselves

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Sun, 28 Sep 2014 16:24:00 PDT
12v to 24v converter makes led flick - help! pedrosaldanha84 Hi!! I installed 3 led lamp 24v in a caravan(RV). I have as a source a 12v battery from the 12v battery (a battery from a car with 90AH). To supply the led lamps I have installed a 12v to 24v convert 3 amp between the 12v battery and the 24v led lamps. But as soon as I turn on the power, all leds s...
By: pedrosaldanha84

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Thu, 25 Sep 2014 12:30:16 PDT
how do I rig a row LEDs to come on and stay on in response to an outside stimuli? paula.zelankoprisco I want to make a wedding card box that has a row of LEDs in hearts (like the life bar from Zelda that is a row of hearts that light up as you get more life) So as more and more cards are put into the box, the hearts will light up. I picture that after, say, 3 cards are put in, that half of the fir...
By: paula.zelankoprisco

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Wed, 24 Sep 2014 15:59:49 PDT
96 by 286 LED Light strobe. michaelferns1 Hi I am Michael, and i want to make a Name board which will have 2 parts. it will have 382 in total divided in 2 parts leds96/286.  I want to make a strobe controller for these many leds.  it should blink 96 led at one time and the other 286 at other time. Please help with the circuit diagram or th...
By: michaelferns1

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Wed, 24 Sep 2014 10:14:54 PDT
What kind of LED is this? And how to use this using DC or AC? CarlGemarino Good day everyone. I'm new to Instructables and I'm searching for LED projects. I have destroyed our old CD player which have so many LEDs in it, and found out they are not the conventional circle LEDs. They are rectangle-shaped. I remembered that these LEDs light different colors, but I'm not sure....
By: CarlGemarino

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Fri, 19 Sep 2014 23:39:18 PDT
Looking to build a led flicker circuit? 'earl Hi, my cousin asked me to help him finish a project. He has made 8 pumpkins for a halloween decoration, And wants to have the lights and mouth light up. So I figured about 5 led's per pumpkin (maybe 3). And I have rgb ones on hand already so I figured I could use those to make orange flickering ligh...
By: 'earl

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Mon, 15 Sep 2014 20:07:00 PDT
Issues and safety precautions to take with a 50-70 feet 12v bus line? bipl12 Hi  i am thinking of building a emergency LED setup with some 1w or 3w LEDs which will be connected to a 12v bus line powered from a deep cycle battery. I will be using a fuse between the battery and the bus line. I am thinking of placing a cluster of LEDs every few feet(7-10 feet). Each LED will be...
By: bipl12

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Thu, 11 Sep 2014 01:48:22 PDT
Led Power Supply? charles.terhune  I am going mad over trying to figure out what power supply I need. I am making an arduino controlled aquarium fixture and plan on using 30x3w leds. From what I understand using resistors could cause fire and I don't want that of course. I like the look of laptop drivers like this one
By: charles.terhune

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Wed, 20 Aug 2014 16:11:18 PDT
Is it possible to make a LED at home? RichárdK I want to make a Little LED from scratch
By: RichárdK

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Wed, 20 Aug 2014 11:41:13 PDT
How to make the voltage of the RGB LED's green and blue higher in this circuit? worthyrabbito So I have two 5mm RGB LEDs. In my schematic diagram, RGB LED 1 is common cathode, while RGB LED 2 is common anode. My LEDs config is this: Forward Voltage: 2.2V (R), 3.2v (G), 3.2v (B) Forward Current: 20mA I think it's the same for both? Of course when I send data from the PIC pins, one will tur...
By: worthyrabbito

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Tue, 19 Aug 2014 21:47:36 PDT
Help needed - I'd like to run some mains powered led lights from battery instead and control remotely? mikepalmersinger Hi all and thanks in advance for taking the time to read this plea.... Here's a bit of background to the project I'm trying to undertake. My wife and I recently got married and as we met many years ago working on a cruise ship, my family decided to commission a model builder to build a replica of t...
By: mikepalmersinger

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Mon, 18 Aug 2014 09:29:05 PDT
how to solve samsung full hdmi led tv isuue? ks vani my tv sumsung model UA 32F5500ARXZN  led full hdmi  gives trouble. it's blinking /flashing. audio & vedio is good. how to fix blinking issue?
By: ks vani

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Tue, 12 Aug 2014 08:45:33 PDT
Problem with 8x8x8 led cube ? Mayoogh I made a 8x8x8 led cube , i had finished all soldering  all leds works properly   but now i have a problem some of the glows(lightly) when ground is given to the +ve leg of the leds  or when 2 when +ve and -ve is given to -ve  of different layers Is this problem negligible ?? will the cube works ?? 
By: Mayoogh

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Fri, 8 Aug 2014 23:32:28 PDT
I want to make a joule thief to power a 10W LED (833ma @ 12v) from ~2 AA batteries, suggestions on toroid ? # of turns ? yaly My transistor inventory: Part #          Package TIP122       TO-220 TIP32          TO-220 2N2222      SMD 2N3904      TO-92 2N3906      TO-92 C1815        TO-92 BC546        TO-92
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Sat, 19 Jul 2014 17:02:48 PDT
LED lamp voltage X DRIVER logoaki Hello my friends, What about the voltage, Is the driver that operates according to the voltage capacity of the bulb (20-26v) or is the lamp that operates according to the capacity of the driver (20-36v)? The voltage of which one acts according to the other? Can I use a lamp of any voltage since thi...
By: logoaki

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Fri, 18 Jul 2014 10:49:37 PDT
LED Lamp current X DRIVER logoaki Hello very good people, 1. Someone told me that I can connect a 3.8A led lamp to 100w driver 3A (constant current) because the driver will dimmer the lamp. Is this correct? 2. Is the driver that operates according to the capacity of the bulb (3.8A) or is the lamp that operates according to the cap...
By: logoaki

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Fri, 11 Jul 2014 05:31:37 PDT
Can anyone help me troubleshoot a non-responsive RGB SMD5050 LED strip which keeps flashing rapidly in blue colour? darmic I have recently bought a 5m strip of RGB SMD5050 300LED strip together with a 12v controller and remote control. I have cut and soldered this LED strip into numerous small parts, as suitable for my application (as additional car lights). However on powering up this LED strip, its colour is blue whic...
By: darmic

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Mon, 7 Jul 2014 18:19:28 PDT
Help! How can I power 2 1w LEDs with a 3.7V e-flite battery? turbeau I am trying to wire/solder up two LEDs to put into a visor for a costume. When I tried the battery with 2 LEDs they burnt out. Since the two lights will be right in front of my eyes and the battery near my temple, I do not want anything getting too hot. I have tried to use online LED calculators but...
By: turbeau

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Thu, 3 Jul 2014 13:06:27 PDT
power LED strips via car battery? anuvanoob I've got a little project where I'm installing RGB LED strip lights in and around my car. They are 5 volts strips and looks like it'll require up to 10 to 12 amps for the total installation. Can I use the car battery to power this? If so, how do I go about doing this?
By: anuvanoob

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Wed, 2 Jul 2014 01:26:01 PDT
LEDs or even EL wire that reacts to sound (not just an audio line)? jbennett38 I want to know if it's possible to create a set-up that will allow me to utilize a small (mini) microphone and then filter the sound to have specific LEDs react according to the frequencies.  The filtering might need to happen through the use of custom built crossovers in order to filter sound, and ...
By: jbennett38

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Tue, 1 Jul 2014 07:42:12 PDT
Can anyone point me to a good source for specialty LEDs? packrat I am  looking for someplace that sells miniature LEDs. My wife has a clothing project she is working on, and I am trying to add some light accents to it for her, but what I need for the project are tiny LEDs, preferably Thanks in advance for any help and resources folks can pass along. All your he...
By: packrat

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Mon, 30 Jun 2014 01:58:22 PDT
How can I connect three 100w lamps to a 300w led driver? logoaki Hello my friend, Could you explain if is possible to connect 3x lamps of 100w to 300w led driver? The led driver specification was: constant current, 27-36v, 9A. The lights: 1x, 27-30v, 3.5A, and 2x, 30-36, 3A. So, can I connect lamps with differents voltages to this dirver? If not, is it possi...
By: logoaki

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Sun, 29 Jun 2014 13:48:55 PDT
Run a few 1 watt LEDs using transistor from 3.7v ? shijilt hi , I want to control 5 X 1W leds using a LDR. It will be running on a 3.7v 4500mAh battery . I have the LDR circuit. The problem I face is , normal transistor are not capable of running 5W leds (1W X 5) , it just heats up. i tried some high power transistors , they seem to provide less voltage to...
By: shijilt

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Thu, 26 Jun 2014 21:43:58 PDT
LED Math Help Lord_Tryndamere I want to create a LED grow light but i am having trouble with the math. I have 5 blue LEDs that are 3w( Vf: 3-3.4 v and If:700ma). Now i want to wire these in a series. So if i were to use two of these for example, would it require more volts and the same current. So: 2@3v = 6v @700ma. 
By: Lord_Tryndamere

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Thu, 26 Jun 2014 17:01:04 PDT
video projector won't work jbaker22 Hello, I have been trying to get a Sanyo Multiverse to work with a 20w chip LED. I may have tricked it's motherboard it into thinking it is powering a bulb. The projector stays on instead of turning off when the bulb was missing. I put the led chip where the bulb was, and turned on the LED on. I saw...
By: jbaker22

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Mon, 2 Jun 2014 18:58:13 PDT
Shift Registers vs LED Drivers? texpert I am trying to figure out how to program an arduino to control LEDs. Basically, what I have done, is I have made a 3x3 matrix and can program some simple sequences with the LEDs using the digitalWrite and delay functions.  I'm not even sure that this is the right way to do this, I don't think it is,...
By: texpert

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Mon, 26 May 2014 20:37:46 PDT
LED lighting into square shaped tubing. How can I do this? blurhoops I would like to construct clear polypropylene tubing into about a 20 inch by 20 inch or smaller square with led lighting inside for hula hoop performance. It needs to be battery powered and evenly distributed with weight. Needs charging capability and little to no battery gap. Can anyone explain wha...
By: blurhoops

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Mon, 12 May 2014 21:34:14 PDT
Who can make LED Equalizers such as the ones that go inside T-shirts but much smaller? Chelseamarie237 My boyfriend and I own our own mask company. We used to put equalizers in the mouth piece. They were about 2inchs long by 4 inches wide and were powered by a AAA battery pack. The manufacture stopped making them and we are looking for someone new who could make them or something very similar in size...
By: Chelseamarie237

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Wed, 7 May 2014 11:27:44 PDT
Would a 100 watt RGB led floodlight be as bright as a single color 100w? firestars I'm looking at high power colored flood lights, single color would be ok but the added flexibility of RGB would be great. I was wondering since color changing leds are made of three leds if I set it to blue would I get only a third of the brightness as the same wattage in single color blue?
By: firestars

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Wed, 30 Apr 2014 11:13:18 PDT
How to power my LED Strips? afarmer10 Q: How can/should I power my LEDs? Info: I am using 3m of adafruits 144 LED strips and 4m of the 60 LED strips. 144 LEDs    60  LEDs    My Power Supply
By: afarmer10

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Fri, 11 Apr 2014 23:01:02 PDT
LED DRIVER assistance required? m3ngc I am trying a diy led build. I have 9 3w 4v 800mah high power leds and a  240v AC to 26-39v variable voltage DC 1500mAh fixed  driver. My first question is, if I connect my 9 leds in series =36v leaving 3v drop do I need to limit the fixed 1500mAh current and if so how. My second question, is there ...
By: m3ngc

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Wed, 9 Apr 2014 13:32:22 PDT
max output current of cc cv led driver if i use leds in parallel? bipl12 I was thinking of using some 2w leds which i already have for home emergency lighting setup. I was thinking of using as the driver of the leds....
By: bipl12

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Mon, 31 Mar 2014 21:16:55 PDT
Can I run 10w 12v leds directly form a switching power supply? reducingmyconsumption Hi, I have a regulated switching power supply with 12vdc 400w output (similar item pictured below) and I need to power around 20 10W LEDs which are rated at 900mA. Can I wire these in parallel directly from my power supply since I know the voltage can't change meaning that the current (and heat) sho...
By: reducingmyconsumption

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Mon, 31 Mar 2014 08:20:15 PDT
random 6 LED light circuit? lonesoulsurfer Howdy, I want to either make from scratch or purchase as a kit, a 6 LED, random generator.   What I need it to do is circle through the LED's randomly for 5 seconds or so , and then finally light 1 LED up for 10 second or so.  Any help would be much appreciated.  
By: lonesoulsurfer

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Thu, 20 Mar 2014 17:03:32 PDT
Joule Thief Toroid not helping to step up, Why? Arijit Chatterjee Hey fellas..I am having problems with joule thieves especially with the toroid part.... First time I wound my Ferrite Core and the joule thief ran smoothly... But recently I had to unwind it to try other wires which didn't work.. So i again wound up the toroid just like the first time when it used t...
By: Arijit Chatterjee

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Wed, 12 Mar 2014 19:53:22 PDT
Model RR, LEDs on variable ac input voltage 31cssinc Led's for ac powered model railroading, to replace incandescent bulbs.  Voltage to track varies from 5 to 17 volts AC.  Leds will light up, but what is it doing to them. They do not pop like a flash bulb at top voltage. I've rectified some to dc voltage for lights in cars, the variable voltage se...
By: 31cssinc

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Wed, 12 Mar 2014 15:01:25 PDT
How can I make RGB LED lights change color with a switch? metalshiflet I would like it to have five options: Red, Green, Blue, White, and a pulsing, changing color. What switch can I use and what parts would I need?
By: metalshiflet

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Fri, 7 Mar 2014 06:38:42 PST
how do i connect LEDs to my (electric) guitar that light up as i strum? R31N i have had this idea in my head, about making a custom guitar that lights up as i'm playing. i've came up with several ideas, like sound to light... but it picks up background noise. an idea i had, was to do a direct attachment to the pick-ups... but i don't want it to mess with the sound (distort o...
By: R31N

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Thu, 6 Mar 2014 09:24:17 PST
How to get a 44 key IR Remote to work on Rf audio Controller for LED's? RuneSlayer25 I bought a RF Controller and the remote gave me did not have all colors i wanted, and when i bought my LED strip they came with IR remote and receiver and i would like to set it's remote up instead as it had more buttons. But i don't know how.
By: RuneSlayer25

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Wed, 5 Mar 2014 10:39:23 PST
Powering LED strips with a power supply with a number of outputs? dneishtadt Hi, 1. I have 5 meters of LED strip, but they are actually 5 pieces, 1m each that I want to connect in parallel. The 5m require 12V 48W, so each 1m is actually 48*1.2/5=11.5W Can I get a power supply with 5 outputs of 12W instead of 1 with 60W? Will it make it smaller physically? Is there such a th...
By: dneishtadt

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Wed, 5 Mar 2014 09:36:33 PST
I designed a 30*30 matrix led board can anyone tell me how much voltage do i need to drive whole board? dh5
By: dh5

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Wed, 5 Mar 2014 01:33:49 PST
is this led array right? kturner6 +18V + -||- -||- -||- -||- -||- -/\/\/\- + R = 22 ohms + -||- -||- -||- -||- -||- -/\/\/\- + R = 22 ohms + -||- -||- -||- -||- -||- -/\/\/\- + R = 22 ohms + -||- -||- -||- -||- -||- -/\/\/\- + R = 22 ohms + -||- -||- -||- -||- -||- -/\/\/\- + R = 22 ohms this lay out has the resistor on the negativ...
By: kturner6

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Fri, 28 Feb 2014 12:28:59 PST
74HC574 VS 74HC595 reckerd Can anyone help me understand when you would use one over the other? I am reading the spec sheets and I am not understanding the difference. I am gathering parts for two different projects. One is making an 8X8X8 LED Cube and the other is making a plaque using 8X8 matrix cubes. The plaque will have ...
By: reckerd

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Fri, 21 Feb 2014 08:58:22 PST