Bi-color LED's

Hey. I was looking for some small, or even surface mount, bi-color LEDs. I also, however, need a wide range of colors, as I am doing a Rubik's cube type thing. I was contemplating the idea of Tri-color LEDs, and having the 6 colors be RGBCMY, although that may over-complicate things. Thanks for your help :-)

Topic by zachninme   |  last reply


I need add a Led activity on a USB connector, can anybody help me?

Topic by peltawar   |  last reply

Flashing LED usb

I'm not really sure where to start with this, but in the end I's like an LED strobe where I can control how fast is flashes precisely (for example 5khz). My Ideas so far is you have an LED hooked up to my laptop via usb with a simple program to control the speed and how many times it flashes. Right now I've got LED's and usb's and 100ohm resisters if i need them. From what I've read I don't think I can control the usb port's power so I'm assuming I need a driver board or something? I'd love some help with this but I assume I've been too vague, mostly because I'm not sure what i'm talking about. Any help I can get would be amazing. Thanks

Topic by mitchpope93 

LED light

Hello! First of all I want to say hi to everyone as this is my first post! I hope to learn some interesting things from all of you.  On the topic now. I want to make a USB LED night light for my sister. I wanted to make it USB powered with RGB (or whatever they are called. I'm not too familiar whit all this stuff) LEDs that you can control in computer. Is something like that possible without expensive controllers and what not? Every answer will be appreciated.  Thank you!

Topic by slaps123   |  last reply

Twinlking LEDs?

Hi there. I need to know the code to program about 12 white LEDs on arduino for making them randomly twinkle or something in that nature. I'm currently working on a Disney inspired project in which I recreate one of their firework shows on a model of Sleeping Beauty Castle i made. At points in their shows, there are scattered bright LEDs on the castle that twinkle randomly and fast. I want that effect on my castle too. I also wanted to know how to program a tri color LED strip that i can use to recreate lighting in the show too. Any help is very appreciated! Thanks!!! -Ray

Topic by ray33_   |  last reply

USB thing?

Is there a way to make a USB thing that lights up a led (<-- That's the easy part) and tells the computer that the USB port works?

Question by account3r2   |  last reply

controlling LED's via USB?

I was thinking about making something similar to this. I wanted to also have the 12 LED's (4 of each color). However, I also wanted to be able to control them from my computer, and possibly make them react to music. I'm not the most experienced with LED's, voltages, etc. etc. etc. I'm taking a digital electronics class, but we have been prototyping circuits on breadboards and building them with schematics software, so building a simple circuit wouldn't be too much of a problem. But, thats about all we've done. I don't have much experience writing code for anything, however, my friend is pretty decent with VB and vaguely able to code in either C or C## (forgot), so I could probably get him to help me with the coding. Can someone either point me to a website that would be helpful, or explain to meA)How to make the circuit if I need to make oneB)How to connect it to my computer (I was thinking USB, but I'm not sure how I'd do it)C)how to write a program to change colors, and possibly make it react to music

Topic by iamthatguy113   |  last reply

Problems with blinking leds

The P2 goes in which place? oh... In usb wich is the color of the negative side?

Topic by Tony5 

Problems with blinking leds

The P2 goes in which place? oh... In usb wich is the color of the negative side?

Topic by Tony5   |  last reply

power single LEDs with USB?

I'm wanting to use some single 0603 LEDs here and there for a display.  I want each light to have its own power plug.  I'm figuring usb cables are a good way to do this (since I can power them by plugging into a hub, and retractable usb cables are cheap and handy).  If anybody has a better solution, I'm open to ideas. My question is whether there's some way to use a single resistor with the hub, instead of needing to add a resistor to each usb cable?  I'm assuming no, but figured it doesn't hurt to ask. Also, do I need different resistors depending on if it's usb, usb 2, or usb 3 hub/cables? And finally, since I'm getting my 0603 LEDs from some pre-wired Christmas light strands (mostly white, but a few colored), I don't have exact specs.  Is there a general standard that I should use for calculating which resistor to use?  3volts and 20mA sound good?

Topic by aliasjanedoe   |  last reply


LED throwies are so populear that this happend. i serched for LED on google. Light-emitting diode - Wikipedia, the free encyclopediaA light-emitting diode (LED) /ɛl.i.ˈdiː/ [1] is a semiconductor diode that emits incoherent narrow-spectrum light when electrically biased in the forward ... - 153k - Cached - Similar pages - Note this Howstuffworks "How Light Emitting Diodes Work"Light emitting diodes form the numbers on digital clocks, send data from remote controls and light up traffic signals. Find out how LEDs work. - 62k - Cached - Similar pages - Note this SUPER BRIGHT LEDS homeOffer LED products and components including replacement bulbs and circuit boards. Includes detailed specifications and wholesale information. - 4k - Cached - Similar pages - Note this is everything LED. Find loose LEDs, LED controls ...TheLEDLight.Com stocks a variety of low voltage (12vdc or 24vdc) LED lighting products such as under cabinet lighting, LED bulbs, LED fixtures, ... - 40k - Cached - Similar pages - Note this LED Circuitry tutorial: how to hook up LEDs.LED Circuitry tutorial: how to hook up LEDs. Text and illustrated instructions for setting up a circuit, what is series and parallel circuits, ... - 15k - Cached - Similar pages - Note this LEDs Magazine - LED Technology, Solid State Lighting and other LED ...LEDs Magazine - LED Technology, Solid State Lighting and other LED Applications. - 31k - Cached - Similar pages - Note this What is a Light Emitting Diode?What is a Light Emitting Diode Fundamentals of Physical Science Experiments by Experimentation ACEPT. - 8k - Cached - Similar pages - Note this LED Throwies - Instructables - DIY, How To, art, techDeveloped by the Graffiti Research Lab a division of the Eyebeam R&D OpenLab, LED Throwies are an inexpensive way to add color to any ferromagneti... - 178k - Cached - Similar pages - Note this

Topic by dsman195276   |  last reply

7 Color LED Help

I have recently bought two 7 color blinking LED's from RadioShack and learned how to make them change colors and such. I have figured out that if you put a momentary push button switch (with 4 pins) onto the "switch" pin to ground you can get it to change to a solid color then to the cycling of all colors forever. I have two of them set up in parallel, they both start at the same time but slowly become out of sync. Can anyone recommend anything I can do to keep them in sync? I plan on putting these in my car someday as floor lights and it would be nice to have all the lights change color at the same time and not have to keep pressing the darn button over and over again to reset the LED. Any other tips regarding LED's would be appreciated. I am kind of a noob at this so please try and "dumb it down" so I can understand. I am only just grasping the basics of hobby electronics but am very eager to learn more. Actually, any tips in general that any hobby electronics enthusiast should know would be nice. Link to LED discription: Part #: 276-016

Topic by Wally_Z   |  last reply

Is there a LED with adjustable Wavelength and color?

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.

Question by Dasaradh M S   |  last reply

Color Shift Dimming LEDs

Dim an incandescent, and it produces a mellow, warm orange sunset glow. Dim an LED, with the same SCR dimmer, and it flickers at 60 hertz, still producing harsh blueish light. How can LEDs more closely mimic incandescents?

Topic by Toga_Dan   |  last reply

Two Color LED help? Answered

Does anyone know how to wire a two color LED?

Question by Redfox888888   |  last reply

color changing LEDs -not RGB

You know how you can buy RGB LEDs that fade between colors?  I'm looking for something along those lines, but with other colors.  I'd found a site once that had some, but I lost the link.  I think it had like purple/yellow/orange and other crazy colors, and I'm desperate to find these types of lights again.

Topic by aliasjanedoe   |  last reply

Help with color changing LEDs?

So I am looking to do something like this with LEDs, but what I want to do is have some red and yellow LEDs in the light fixture and put them all on a remote or dimmer switch, so when I turn it down, it will mimic a sun set. I have no idea how to do that. Any suggestions? Bonus points for anyone who would know how to incorporate fiberoptics for starlight.

Question by Focker   |  last reply

Color changing LED faucet?

I'm looking to make one of those faucets that changes color with the temperature of the water coming out of it. I already have a preliminary circuit using a thermistor, an LM311 comparator and a couple LED's. Just wondering if anyone had any tips of how to refine or whatever. Also hitting a roadblock on how to power this, as I want to make it entirely analog (no microcontrollers, just op amps and the like) and I want it to be fitted to an actual faucet nozzle. If it is fitted to a nozzle, space is very limited and batteries are really not desired. I was thinking along the lines of a mini waterwheel or something that uses kinetic energy from the water.

Question by jarredpickles87   |  last reply

Usb Charger

I have 2 questions; 1.) Does anyone know if I can use a resistor in a usb charger? If so, what bands.(ex red,blue green, ect). 2.) Can I use an 3v LED to reduce the power to 6v. Would 6v harm my electronics?

Topic by ry25920   |  last reply

RGB LED Sun and Moon

So, I'm working on this thing, its just an idea right now so I won't delve into it too deep, but I want to use a single RGB LED behind a frosted plexi screen as a Sun and another as a Moon, that will move on a clock motor. Could I get a white with a yellow tinge and a white with a blue tinge with a RGB and a few fixed resistors? I'm just wondering if that would be possible. Would I just set the red and green components to 70% and the blue to 100% for the moon and the red and green at 100% and blue at 70% for the sun? Thanks for the help. I don't have any RGBs so I'm just trying to theorize right now.

Topic by mattthegamer463   |  last reply

LED light up USB

Working on a project of mine and I'm stuck.  I'm trying to get an LED to light up when the USB port is in use for a charger, not when it's plugged into an outlet, but when someone plugs their chord in the USB port I want it to light up then.  How would I go about doing this?

Topic by MastaAzumarek   |  last reply

USB powered LED with Program?

How would i make it so theres a program to turn a led on and off via usb, i already stripped the usb cable to get red, black, white, and green wires, i know vb6, so i can write it in there. Help very much appreciated, been using google, and cant find it. EDIT: i dont have pic micro controller.

Question by MrCircuitBoy   |  last reply

LED Light via USB?

Hi guys, I've been searching about, and this seems to be quite the vibrant community for DIY gadgets. I'd like to have as final product, a led light connected to a PC via USB - that has a software-controlled dim functionality (ie, 1 is on, 0 is off, values valid 1 < x < 0). I'm a seasoned programmer, but the hardware side of things has always been a mystery. Where to begin? Is this a complex project? Cheers. Alex

Topic by Saeven   |  last reply

Achieving different colors with RGB LEDs

 Does anyone know if it is possible to get brown with RGB LEDs?

Topic by pilferingpanda   |  last reply

led charging circuit

I dont have much experience designing circuits but i can soldier. I need to design a circuit that can charge 2 aa rechargable batteries and power 2 leds. Each rated at 25ma and 2.0~2.2. I want the circuit to be charged by usb and use a 3 way switch. Off, on (both leds) and charge. The usb will be plugged into a mains usb charger, not a pc port. I think i have included all important details. So please help me by explaining what i need to do and possibly schematics.

Topic by o0SLOVAKIA0o   |  last reply

Event programmable USB LED/light (for the deaf)

Would like to see... a USB LED, which can be programmed to light up ...based on some 'event' such as new email, or whatever software triggers can be programmed, to turn the light on/off.  Even better, if there was a means to use different colors... or blink rates.

Topic by RpD   |  last reply

Usb eMail indicator?

Hi, I am looking for a no circit( or chippy thing) usb diy eMail indicator. I would like it to light up a led and ring a bell.

Question by Warlrosity 

Cheapest LEDs?

Where's the cheapest place to get assorted 5mm LEDs? I can get 100 for $8 including shipping, but those are just one color... Any other places?

Topic by perkinsb1024   |  last reply

USB charge. Will this work?

Will this work? please reply with this LED work for me.....If i put the  USB cable from my phone or mp3 player  instead of the diode...Will this work? P.S.  my english is not very well

Topic by Gvozdenovic   |  last reply

I recently bought something that has a color changing LED in it. That LED has only two pins. Answered

I recently bought something that has a color changing LED in it. That LED has only two pins. When I look at radioshack, they have color changing LEDs that have two pins with mode, so three pins. Where can I buy two pin color changing LEDs without mode. They do have that type of LED.

Question by alpe_97   |  last reply

RGB led wont change color correctly. Answered

 I an trying to make an Arduino lamp that changes color with the turning of an potentiometer to make the RGB go from green to red to blue but it goes from green to yellow to purple. the code is at since instructables wont let me paste. please help, thanks in advanced.

Question by andyspam   |  last reply

where can I buy an Led color changing light ?

Where can I buy an Led color changing light ?

Question by todesfugue   |  last reply

Has anybody tried painting LEDs?

Because the colors available just aren't enough and we want more. *glances at collection of smt LEDs then at collection of nail polishes* The odds of me blowing up an LED or setting something on fire are slim, right?

Topic by aliasjanedoe   |  last reply

LED's For The Holidays....

Hi everyone.. it's christmas time once again in america and the led light sets are pretty cheap... different shades of white and colored strings are usually cheaper than buying the led's individually.... enjoy.. :)

Topic by Hurdy Gurdy Man 

rgb led uv usb light that responds to music for a DJ

I wanna build a light to plug into my laptop powered by usb thats UV led's to light the keyboard and have either changing to red light or multi-colored lights. Or just keepin it UV and strobing

Topic by ddude04   |  last reply

Resistor Colors Confirmation

 Hi, I got a bunch of resistors with my LED order, and I'm having a hard time with the colors on this set. The picture actually shows it clearer than I can tell with my eyes. So what is your verdict of them? 70?

Topic by Justinph5   |  last reply

LED Scanner

Does anyone know how to make a Knight Rider style LED Scanner (the light bounces from one end to the other) ? I've searched the forums and didn't find anything like this.. I would really like to use 7 LED's BTW - This forum rocks! I've tried some of the projects(USB Charger, small LED stuff etc) and they've all turned out great! Thanks in advance!

Topic by milanorex   |  last reply

UV led? Answered

Hi all../ Please  help me by tell me what  kind of UV led ( the  WAVELENGTH) for better see water glow in the dark ( water + highlighter pen ) with this color (please see photo)Because in Ebay sale some different UV led  wavelength 390 to 410 nm . Many thank you.

Question by lam   |  last reply

How to make a color selectable LED?

Radioshack sells these LEDS that are 5mm 7-Color and you can use a momentary push button to make it change colors, the only bad part is that these LEDS are like $3 EACH. They are great if you only need a few but I need about 30 of these. Does anyone know a cheaper alternative to getting this same effect? Is there a way you can control regular RGB 5mm leds? Thank you. (I really need 5mm LEDS for this and LED strip lights will not work)

Question by Zebrah   |  last reply

USB Controlled Microcontroller

Hi, i'm new to microcontrollers and I want to make a Usb powered and controlled 5 x 20 Led array using charlieplexing, and I have a few questions: - Is there only 1 led on at a time when charlieplexing? - What microcontroller should I use? - Is there a good instructable on connecting a USB to a microcontroller? (i've searched) - Does anyone have a suggestion for a programmer. Thank You, Sander

Topic by DELETED_svkatwijk   |  last reply

Color Changing LED Ring - Help

Hello, I've searched most of the LED Instructables section looking for something I'd like to make. I'm just looking into making something very basic. Simply put, I'm looking to build a round "coaster" type object. I'd like it to have a few coloured LED's that are in a circular shape but will fade in/out and mix colours together. Picture having this under a glass object and it's purpose is to light up the object with different colour patterns and such just for looks. If anyone could help me out with this, it would greatly be appreciated. I'm just starting to get into LED things. I can wire the LED's to all be on, but that's not what I want.

Topic by Beyquin   |  last reply

LED Belt

Would 4x AA batteries, light up 9 LED's in Parallel?(With a resistor of course) The LED's are 3 volt. I am making an LED belt for my Friend. I wired it up and only the red LED's lit up for some reason.( The colors used are red, green, and 1 blue) is there a problem in amperage or is there a short or something?

Topic by Jordo   |  last reply

How can you tell what is the anode and cathode on a tri-color LED--it has 4 leads? Answered

Its this LED here also what is the best way to hook it up

Question by Fresnel110   |  last reply

connect usb cable to usb keyboard

I have a usb keyboard. somehow the usb cable is disconnected from the keyboard. I opened the keyboard. USB cable has 4 wires (1 blue, 1 orange, 1 white and 1 green). The circuit board has code like C, V, D and G. Now which one is for which wire? out of C,V,D and G which is for ground, which is for VCC and which is for Data+ and data- the color code of USB cable I know. But cannot understand which wire to connect which code (C,V,D,G) of circuit board?

Question by jpsarkar   |  last reply

LED Incapacitator

The LED IncapacitatorThis story has way too much instructables-appeal to go unnoticed. I like the following line particularly: "There's one wavelength that gets everybody," says Lieberman. "Vlad calls it the evil color."It all sounds a little too much like we will soon know one of these partners as Vlad the Incapacitator.

Topic by Sullen70   |  last reply

How to make a "Timed" LED Color Sequencer ?

I would like a "timed" LED Color Sequencer. So instead of a board that flips between leds or strobes I want it to stay in a color for a couple of minutes. Ex: green for 3mins, then fade to red for 3mins, then fade to blue for 3mins then fade back to green.. Time as 3mins is just a example but must be for a longer period then just a fade and longer then just a couple of sec. It must be driven with small batteries, must be driven on its own so no interference of people as a touchpad to switch/fade.How would one do such a idea, do I need to have a microproc or can I skip that ?

Question by captm99   |  last reply

Led color control w rotary switch?

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 would allow me to ramp it from the blue leds to the yellow leds with some cross over in the middle. my challenge is that, while I understand basic electrical circuits, I know very little when it gets into the more technical circuits and arduino stuff. I want to learn but this isn't the project for it. does anyone know of an easy way to set this up?  My  thought was a set of blue strips, a set of yellow strips and a rotary controller. But, I don't know what to search for online. thanks!

Question by mckeephoto   |  last reply

USB type C

Greetings, USB type c please? So I have spent alot of time researching different ways to light small ornament designs. I have considered EL lighting and LED, yet, in order for these lighting techniques to work sufficiently, you need 12v of power. There are Instructables to power these lightning methods per USB, however this ofcourse only provides the lightning with 5v. What I find quite surprising however is that there are no tutorials whatsoever with the new usb type: USB-C. Since USB-C can apparently provide 20v I wonder why there is little to no information available concerning these subjects. Are there technical limitations I dont know about? If not: would anyone please help me make usb-c powered led strips ^^

Topic by zeepjes   |  last reply

Blinking bi-color LED on music?

Hi people, I'm looking for a simple circuit wich can blink multiple bi-color 2-pin LEDs(using both colors of course). It needs to blink on the beat of music, using a mic as input. I would also like the sensitivity to be adjustable. And it would be fantastic if all this could run on 3 AA batteries(4.5V). I've done some research but couldn't find anything like this, only circuits that blink a bi-color LED or flash a LED on music. Unfortunately I haven't got enough skill to combine these into a working circuit. TheExternalDisk

Question by theexternaldisk   |  last reply

Jameco led color organ expansion? Answered

Heres the color organ Now I really want to expand this. Do you think it is possible to connect sst relays instead of the leds that are on the board and then use some high power leds with drivers or strands of christmas lights?

Question by Argmeister   |  last reply