Instructables: question - leds Tue, 13 Oct 2015 11:51:44 PDT BLOX v1.01 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 ...
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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
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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
What type of battery would I need to power 10m of RGB LED strips? cobrien2115 For the summer, I would like to run two 5m strips of RGB LEDs in the cabin of my boat. I dont particularly want to run it off of the boat battery because I do not want to rain it while stationary. So my question is what type of battery, what specs, should I be looking for? Obviously a 12 volt batter...
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Tue, 12 May 2015 13:30:18 PDT
Whats required to run LED lights off a battery? Rchampagne93 Hey, Community  know what boffers are? I was hopping to make a pool noodle boffer, but put a little bit more love into it. I want it to be inspired from star wars. I was thinking of putting LED light strips up/in the sides of it. Maybe 2 or 3 strips of LEDs.  What kind of set up would i need to ha...
By: Rchampagne93

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Mon, 4 May 2015 23:18:43 PDT
If I were to melt copper wire onto wood...? hatii.rose If I were to melt copper wire onto wood, would it still have conductive properties? I'm trying to melt it onto a dried piece of driftwood to look like veins and then solder LEDs onto it. Any ideas?
By: hatii.rose

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Tue, 28 Apr 2015 18:24:59 PDT
How would I go about making ahelmet with LEDs that changed patterns? (i.e. like blinking, moving eye) lucy-cat The costume will be easy enough, but the lights?? Refs: that should be enough.
By: lucy-cat

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Sun, 26 Apr 2015 17:59:37 PDT
How do i go about choosing LEDs for a project? Tomahawk92 So i'm planning on building a battery bank to charge my phone and other usb devices . I wanted to also use it as a flashlight, My size is limited, since i was planning on using an altoids tin, and i'm already stuffing two 18650 batteries inside. What i want to know is what is the brightest led i can...
By: Tomahawk92

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Sat, 18 Apr 2015 16:23:44 PDT
3.6v 250mAh Ni-MH battery to run 10 5mm LEDs? lifeofB I would like to use a rechargeable 3.6v 250mAh Ni-MH battery to directly power 10 5mm LEDs, is that too much mAh?
By: lifeofB

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Sat, 11 Apr 2015 17:10:52 PDT
Battery operated LED lighting inside for inside a picture frame shadow box ? lester.herbertson I need to light a shadow box for a guitar and would like to know if I can use battery's to power it  and a timer to shut it of after a few hours, the box would measure 26 wide and 40 tall And help would be greatly appreciated  Lester
By: lester.herbertson

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Tue, 7 Apr 2015 09:32:00 PDT
Simple Dimmable LED setup? Zaryck Hi everyone, A friend of mine has a project which involves using a large amount (40+) standard 5mm LEDs to light a frame to a uniform brightness with the ability to dim the entire setup uniformly. Due to the shape of this frame its not economical or practical enough to use strip lighting. Rather t...
By: Zaryck

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Mon, 6 Apr 2015 01:29:07 PDT
can someone draw a thru hole board for RGB 10w LED with 12v input? turbiny 12v input from car battery to power this LED   something swimilar to these 1 2 3 but cheap and simple cos i dont wanna use SMD some info   on LED and board
By: turbiny

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Sat, 4 Apr 2015 09:58:25 PDT
Another LED power question? Vyger I bought some LED modules with the intention of using them to replace florescent tubes in some fixtures. But I am now getting a bit confused about the power requirements because the numbers don't seem to add up. These are like the ones I bought.
By: Vyger

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Mon, 30 Mar 2015 14:18:49 PDT
What is the best way to power 25 red 3watt LED's and 5 blue 3watt LED's with a 100w LED constant current source driver? voltskaterzb Please excuse me as my technical skills are not as good as I would want them to be :D So, I am trying to build a grow light with this setup: 1. 25 red 3Watt LED's - DC Forward Voltage (VF) : 2.2-2.8Vdc - DC Forward Currect (IF) : 700mA 2. 5 blue 3Watt LED's - DC Forward Voltage (VF) : 3.4-3.8Vdc...
By: voltskaterzb

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Sun, 29 Mar 2015 15:34:35 PDT
Trying to make an LED Map, so placing an led anywhere on the map will make it light, any help? AraMod I'm trying to make a map so that I can place an LED anywhere through it and it'll light up. Kind of like the old push pin method only the push pin is a single LED and I can place as many as I want on the map wherever it may be and it'll light up. I found one online but it's very expensive so I was t...
By: AraMod

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Sun, 22 Mar 2015 00:15:58 PDT
led values johnm56 All i want is a list of led voltage and current values, you would think this a simple task,not so.They are few and far between and when you do find some they all contradict.
By: johnm56

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Wed, 18 Mar 2015 18:46:52 PDT
How to battery power 12v LED strips? hanashoib I was going to power LED strips using a mains supply adaptor but because I want to put these lights in the kitchen, under cupboards, I'd have cables going behind the cooker. That's a big safety risk so I'm scrapping mains power. What solutions are there to battery power the LED lights. I'd like to ...
By: hanashoib

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Tue, 17 Mar 2015 02:33:02 PDT
Im trying to connect 4 high power leds in a series and I'm not sure what kind of power I need? zac.gooch here is a link to the led. They are 20w each...would that mean I need more than a 80w power supply?
By: zac.gooch

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Sun, 15 Mar 2015 19:09:53 PDT
How to cut a LED Strip by not the marks provided? crazybirzzz i'm lookin for a LED strip very special. 24V RGB 60 LED/m 1800 lumens / m IP 20 Trimmable each 5 cm. HERE COME THE ''PROBLEMO'' (Terminator) Every body offers to me each 10cm but it's imposible for us use that one. when I say everybody believe me  that I asked a lot of suppliers. Do you know how ...
By: crazybirzzz

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Tue, 10 Mar 2015 04:48:52 PDT
12V 5m LED strip. Cut into 1m, how much V per metre? hanashoib So I've bought one of those 12V LED strips. I want to install a 1m length of LEDs. Do I need 12V for each of the 1 metres or will I need something like 4.5V per metre. Thank you
By: hanashoib

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Fri, 27 Feb 2015 03:12:57 PST
Choosing the right LED Dimmable Driver... DonSpud Hi all, I am hoping someone can clear this up for me. I am building a DIY LED aquarium light and have chosen the following components: - 16 x 3W LED, Cool White - 4 x 3W LED, Royal Blue - 2 x 3W LED, Red I want to run all the LEDs off one dimmable LED driver and I have found this one which I thin...
By: DonSpud

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Wed, 25 Feb 2015 03:08:38 PST
Resistor for SMD LED 1306? SteveSquidFox I'm struggling to find any clues of what kind of resistor to use as I am a little new at this kind of project. I'll be using the lights in a small scale 9v project for up to 100 SMDs.  I'd appreciate any advice! Cheers :)
By: SteveSquidFox

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Fri, 20 Feb 2015 08:02:36 PST
LED driver and voltage help? joshuawcolvey Here goes nothing. How everyone can help. Right now i have a 50watt led that can be wired 85-277VAC. It has a led driver that  has all this on it. Vin:85-277VAC Lin:ac0.35A Vout:DC20-36V Lout:1500MA+-3%MA 50Wa/70Wb Now with all that being said it is an hP0050 led driver. Now on 120VAC it pulls .42 ...
By: joshuawcolvey

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Mon, 2 Feb 2015 18:37:09 PST
Automatic LED turn on and off circuit, can someone check my circuit to see if it will work? hanashoib So I'm working on project where I want LED strips to turn on and off depending on whether or not the IR LED and phototransistor circuit is open or closed This is what I've come up with. Can someone please check and tell me if this will work or not (sorry I can't seem to find a good simulator) It m...
By: hanashoib

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Sat, 24 Jan 2015 10:37:18 PST
Can i use a 16.80 volt power supply for my led strip? dionisis.ntaouros Hello guys i have an old router's psu . the label on it writes 12V but the multimeter writes 16.80 Volts. Can i use this power supply or not ?
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Fri, 23 Jan 2015 09:56:42 PST
Amps and Volts? Austinthemighty So i have a atx pc power supply and i am going to use a pci cable to draw power from it for a led lighting system and the led light system can only take up to 12 v at 2 a, will that destroy the led light system or will it be fine? (also i cant open up the box that controls the light system to fix th...
By: Austinthemighty

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Wed, 14 Jan 2015 20:01:49 PST
Bicycle generator for lighting a led strip? mick_ralte I want to make a bicycle power generator for a fair. I want to make two of those in such a way that the one who pedal faster get more number of led bulbs turn on. Can anybody help me with this kind of project. 
By: mick_ralte

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Thu, 8 Jan 2015 09:13:58 PST
Would I be able to put one 100 ohm 1/4 watt resistor in place of two 50 ohm 1/4 watt resistors? Jakester98 The attached picture explains my question a little better. Thank you guys!
By: Jakester98

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Wed, 7 Jan 2015 01:34:47 PST
Best LED colors for long lasting illumination w/ a CR2032 3V Lithium Battery? shewyne an exterior installation where the temps are in the 20's.  Needs to last 7 - 10 days.
By: shewyne

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Sun, 28 Dec 2014 20:33:20 PST
How can I salvage LEDs that are welded to metal heat sink? -max- I have a light fixture that used to be an street lamp, and the 350mA 240V constant current ballast failed. The LEDs appear to be welded directly to thin insulated metal sheets which as somehow bonded to the large metal heatsinks. I think the LEDs are Cree XR-C's, and there are 6 of them on each modu...
By: -max-

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Sun, 28 Dec 2014 14:31:56 PST
Best LED driver lokerin I am looking at making a chandelier which will consist of 6 groups of 13 LEDs. Since this is being hooked to a 120 volt circuit I will need a LED driver. Is it better to build the driver myself or just buy one.
By: lokerin

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Thu, 11 Dec 2014 22:46:57 PST
can I connect pre-kit led strip to a battery wired led strip (see pic)? tamsee13 connecting a led kit (white strip) to battery pack (black strip) but am I stripping end both black and white to make it happen. Or way to make black same as white?  Is there an easy way to do this?  Thanks in advance.
By: tamsee13

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Thu, 11 Dec 2014 04:21:36 PST
How can I replicate this? Tom101222 Particularly the display that says volts , I have no problem pushing the data to the numerical display but I have no idea how to go about making the light up display that says Volts.
By: Tom101222

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Wed, 10 Dec 2014 15:17:41 PST
Piezo triggered LED Strip with multiple static and flashing colour? oesheppard Hi There are already a few threads and topics on this site explaining how to hook up a piezo triggered light strip, however I'm looking to build a custom drum kit with particular lighting system and i can't find the info I need to build it.  Inside the drums I want a constant, static colour of my ...
By: oesheppard

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Tue, 2 Dec 2014 05:49:45 PST