How do the LEDs that fade colors work? It's actually three lights, (red, green, and blue), right? But what makes them fade on and off?
Posted by aliasjanedoe 8 years ago
Hi! This might seem like an odd question but I need a fan to "fade in" for an art project I'm working on. That is I need a circuit that makes the fan spin up slowly to full revs. Is it possible to build some simple circuit that can manage this task? And if so is the case could someone please send me a plan for it? The fan is a standard CPU-fan (12V). Thanks for your support!
Posted by feldreich 8 years ago
Good morning. long time lurker, first time poster. i am working on a small project and thought this would be the best place to ask. i need to come up with a teeny tiny circuit that when power is applied will fade in an led (over 1sec), and then when power is removed will fade back out (1sec). it doesnt have to be exactly 1 sec, but somewhere in that ballpark. the space i have to work with is only 21.91mm X 6.02mm X 19.4mm, and id like to also be able to add a small switch in there too so i can disable the led when its not needed. input voltage is 12v and i need 5.5v out, 6v max. any ideas are welcome. i have found a few circuits on here already, but most are way to big to fit into the tiny space i have to work with.
Posted by RelikL 2 years ago
I am using micro controller in a project that has a set of functions (API) that can be used for a plethora of things.. (just up to you to program it that way) LOLIt has a PWM control... which i am trying to use to FADE in (and out eventually) a high powered LED (LUX III to be specific).. the problem I having is that at a certain point (say at 50-60%) of full brightness I see a VISUAL jump in brightness.. Im trying to get it to be smooth the whole way through to 100%more or less the code is like:PWM = PWM+2which I then wait 10 mSecs and loop it again...I have tried to put in some conditional checking to check to see if the current level of PWM is at a certain threshold..and then only loop it again after a longer delay (say 300mSecs) or something..I tried to search.. ut Im not sure on how to get a CONSISTANTLY smooth fade...ot smooth to say 50-60%..then a visual jump in brightness and then smooth to 100%..any ideas or links on the subject are appreciated.Thanks
Posted by xl97 9 years ago
I want to make a "magic" staff which will power on a strong (>100 lumen) LED under a crystal in the top of the staff. There will be a hidden switch somewhere and I want the LED to power up/down in approximately 1-2 seconds. The power source has to be relatively small batteries but big enough to power the LED for up to 30 minutes. I believe this can be done simply with just a capacitor and a resistor connected to the LED but since I'm a complete beginner, I'd like some advice. 1) How to connect parts together. 2) What parts to choose? I can calculate the timing from t = RC (or is it root of RC?) but there are soooo many to choose from. Probably the LED needs to be fully powered at 3 or 6V. Probably the resistor therefore needs to be 100-500 ohms? Probably the capacitor needs to be approx 2 - 20 mF? But it would be so much simpler if someone says: "Take these components - that will work". I guess choosing the batteries will be crucial for both size, voltage and current conciderations. But please note that I want the LED to be as strong as possible - flash light strength. 3) Is it possible to have a faster power down than power up (0,5 s rather than 2 s) without overcomplicating things (and crowding the space provided). The space is probably no more than an inch diameter (2-3 cm) cylindrical hole for a maximum of 3-4 inches (7-10 cm) length. All help appreciated!
Posted by The Mad mathematician 4 years ago
Hi! First of all I want to apologize my English but its not my mothers language. So what I would like to do is add warm white led (leds) into my computer what would fade out and fade in like really slow pulse. How this could be done. I can do basic soldering and schematics but the easier the schematic is the better :) And as cheap as possible because I'm not that rich at the moment. I have googled this a bit but found so many different versions and also they all faded so fast and I want my led (leds) to fade slowly. And because the idea is to but them to my computer this project would be using either 5 or 12 volt source. Thanks for all who can help me! Make
Posted by Markomaani 8 years ago
Hi, I'm still a complete novice when it comes to electronics so I was wondering if anyone here would be able to help. I'm rigging up some LED lighting for my aquarium which is set to switch on and off with timers on the mains supply to the house. The timers switch on/off the power transformers which supply the LED lights. I would love to find a way so that when the power comes on the lights fade on and when it goes out they fade out, would be nice if it was a long fade too, maybe 15-30 minutes, ideally 30 mins to an hour. I am guessing there would have to be some pretty big capacitors involved to that would fill up, increasing the brightness as they goe, when the power comes on and slowly discharge as the power switches off. Another thing to note is that I am using 2 different LED systems. The blue LEDs are using standard LEDs that are sold in blocks (3 LEDs per block, I'm using 3 blocks, so 9 LEDs total) and are designed to run on 12v. I am currently running them on 6v as they are pretty bright, but if the circuity could have them fade over an hour I would like to put them up to the full 12v. The white LEDs are 4 of 3w luexon star type LEDs that are running in serial. The system goes mains > 12v transformer > 3w LED Driver > LEDs. Here is a link to the driver I'm using http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item;=250752711282&ssPageName;=STRK:MEWNX:IT I assume that the fade device would have to go between the driver and the LEDs? Thanks for any help you can give me. Darren
Posted by d77uk 7 years ago
Video of RavelightPicture of RavelightIm interested in building a product that utilises coloured LED lights with multiple flashing and fading patterns.I have pulled apart a few LED products and examined the PCB's and the components and have a general idea of what is going on, however it is all new to me, and im unsure of the possibilities that exist. For example, i didn't know you could get pcb's so small...Basically i need the power source to be the small button cell batteries (up to 6 if necessary, though 3 or 4 would be preferable). With at least 4 LEDs of different colours (RGB etc). A similar design to what I want to make is a flashing LED light stick like people use at raves that I found. It has a button that seems to simply complete a circuit momentarily, and pressing it down again and again, scrolls through its 9 different flashing patterns.I have seen various different LED toys that vary on this, but are basically the same idea.The thing that I don't understand (on top of a lot of other small things) is what is under the black blob on the PCB? Is this something like a 555 timer? an IC? And how are these programmed to give all the different patterns? is it a microchip?This thing cost me $3 from a shop. three dollars!! cheap as....this is what I want for my product. can anyone help me out to understand?I can post a picture up in the next couple of days if people can't understand what i'm talking about.Thanks
Posted by noi noi 11 years ago
Arduino comes with a simple program to make an LED fade on or off, however, as far as I can tell, the apparent brightness of the LED does not change linearly with the wpm duty cycle. After some research I found that this is because humans percieve brightness logarithmicly, not linearly. (Also, LEDs don't change brightness linearly with current, but sisnce I'm using PWM, i don't think that comes in to effect.) I found a simple look-up table to correct for this on this page. 255, 180, 128, 90, 64, 45, 32, 23, 16, 12, 8, 6, 4, 3, 2, 1,0 This seems to work very well, but I don't know where this comes from. Does anyong know the ectual equation to get the % duty cycle from the %brightness? I like to abstractise things.
Posted by Vick Jr 8 years ago
Hey ive recently jumped into the wide world of arduino. well i only did because i required the easy way out of led fading using arduino programming however i wish to use the Basics>fade example but using all 6pwm outputs!! can anyone simply modify this for me :) cheers
Posted by Applecore807 8 years ago
GOAL- My goal is to light up a small model I have using an LED circuit that will automatically fade in and out. DESCRIPTION - I will be using 19 blue LEDs (3-3.2V fwd voltage, 20mA fwd current) and would like them to fade in and out on their own very slowly. I am thinking that this will be powered using a phone charger or other household transformer since batteries don't seem to be a feasible option for this (too many batteries clustered together and/or too short a life span). I have a transformer on hand that runs 5 volts at up to 850mA, so if that works then perfect, if not then I could try to find another transformer. For the sake of simplicity I could add one more LED to make it an even 20, though I would have to drill another hole in my model. TASK - I need the circuit to make these LEDs do their fading. Simple as that. Fading circuits are easy to find on the internet, but I have been having trouble finding anything to meet my project criteria. Any help with this would be immensely appreciated!
Posted by Andrew Wiggin 4 years ago
Hello - I am brand new to electronics but am trying to learn about BEAM and other art + science circuits. I am looking to make a small analog circuit to fade in and out a LED. I have looked online but have found a bunch of ones using a 555 timer or a PWM and other chips. I saw a reference to doing this slow fade in and out technique using only capacitors and resistors but have been unable to find a diagram. Can someone help me out. FWIW - I am looking to charge this using solar and am only looking to drive one LED. Ideally a days charge would last a few hours of fade in and out cycling with the cycle time being slow - somewhat like the Mac "Sleeping" LED. Thank you in advance.
Posted by toddbg 10 years ago
Here in England the light fades fast and i cant take instructable photos after about 5:30 pm because they look dark and crappy. Does anyone know of a cheap way to replicate natural-ish light, like a soft glow not a big glare Thanks :P (like the picture below, its too dark)
Posted by =SMART= 10 years ago
Just got a LCD 20X4 character screen. 10K pot connected to 5V. Can controll contrast. problem is, only 1/2 of it???"--------------FADED----------------""--------------DARK------------------""--------------FADED----------------""--------------DARK------------------"only 2/4 rows of character blocks go dark when full contrast. why is this!!!
Posted by Killa-X 10 years ago
Https://www.instructables.com/id/Romantic-LED-Heart/ I would like some input on making this using a 555 timer and POTs to make an adjustable fade in/fade out circuit while running on a 9v battery and using a pressure switch to turn the LEDs on when the box is opened.
Posted by YoungOne453 4 years ago
Hi, I’m experiencing problems with my LG Flatron Wide. The screen comes on with a very faded picture and then goes black. I assumed that maybe the capacitors (like for others) needed to be changed. However, I have opened the monitor and the caps look perfectly fine, no bulges or anything. Does anyone think I should just go ahead and try changing the caps anyway? Or could anything else be wrong? Thanks a lot.
Posted by Chu Guk 6 years ago
Hi there, I recently bought a tri-color addressable LED strip at RadioShack. I've already tested it with the provided code through the Arduino IDE. Now how would I be able to make my own light display through Arduino. Will programming it be the same as programing any other LEDs? I want to make an LED show on my small Disney Castle model. The strip is long enough to illuminate the entire model. I want to make a show like this (ignore the fireworks, just focusing on the light effect) : PART 1 http://www.youtube.com/watch?v=EAYm_utWGug PART 2 http://www.youtube.com/watch?v=K0f7Sa0h8LY Provided code for Tri-Color Strip RadioShack: http://www.radioshack.com/product/index.jsp?productId=16306856 Thank you in advance!
Posted by ray33_ 5 years ago
I've been having a bit of a dilemma with raster graphics editors such as Photoshop and GIMP. In either of the two programs, when I draw a solid line, it automatically fades the edges. This normally wouldn't bug me, except I need to fill in these areas. Whenever I do so, the area I fill in doesn't do so entirely because of these faded edges. Does anybody know how to make either Photoshop or GIMP stop doing this and fill in the entire area?
Posted by gimmelotsarobots 7 years ago
Hey folks, I'd like to put together a circuit with three LEDs, all different colours, and the ability to fade between them at will. It's for a Sims costume, so the LEDs will be about a foot above my head in an enclosed and I'll need to conceal the switch somewhere on my person, like a pocket or under a shirt. I know pretty much zero about practical electronics, so I don't even know what terms to search with. If anyone can point me towards an existing instructable, or even just give advice on what components I might need to use, that would be sweet :) Edited to add: because I know nada about electronics, I'd like to be able to do this with simple components. I know this could be done with an arduino, but I can count the number of times I've soldered with one hand, and my last programming was on my TI graphing calculator.
Posted by EmmaMuhlack 6 years ago
There are a load of spam threads starting, especially for websites selling sporting stuff. Please do not reply to them, just flag them for review then let them fade away down the list of threads. If you want to make a comment, PM the "member" who started the thread.
Posted by Kiteman 11 years ago
Hey,I am looking into making a Knight Rider-like scanner (see: K.I.T.T) consisting of a row of LEDs (perhaps about 20-30 or so) and was wondering if anyone knew if this circuit would work. I'm not sure if it goes back and forth and has a fade 'tail' or not...http://www.aaroncake.net/circuits/chaser.aspI am looking to make the LEDs light up back and forth with a bit of a fade afterward so it looks like a smooth motion.I am wanting to mount the 'scanner' onto a pair of sunglasses (don't ask, long story, lol). I would like to make the circuitry as small/minimal as possible to conceal in a small area such as behind one of the side frames.Thanks for your time and help.
Posted by wiforkle 9 years ago
I'd like to make a light that will accommodate 2 or three light bulbs/spotlights/floodlights so that one comes on, and ideally fades into the other. It would be used in haunted houses. I am pretty sure this is a simple build, but I'd appreciate direction or advice. Or a full on Instructable. A simple setup with a switch (foot pedal?) that simply shuts off one color and turns on another would do. A button that begins to fade one color out and another in would be better. One that can be set to fade from one to another automatically at a predetermined interval would be awesome. Such a setup can be used to create a transformation effect as simple as Jekyll into Hyde or as elaborate as girl into gorilla. The reason I would prefer it to be automatic is so it can be "plug and play" with only one actor, and work even if it's a different actor each night. Probably something like this exists commercially, and A), I don't know what it is called B) I'm doing it for the Boy's and Girl's club, which has no budget, which means I'm paying for it, which means it needs to be as low cost as possible. C) If I can build it well and inexpensively, I'd like to play with variations on the theme.
Posted by justjimAZ 5 years ago
I have made some concrete stepping stones (for decorative use in flower beds mainly) and have painted them to give them a detailed look. I used exterior paint, Now I'm wondering what I should use to seal them to protect the paint from chipping and fading?
Posted by Gdlucas 3 years ago
Question about flashing red LED: I have a simple circuit--switch, battery, resistor, LED. Today, when I clicked the switch on, the LED came to life very slowly, as of it were fading in. I have never seen this behavior before. Is it the battery? (3V, 2032 coin cell and 100ohm resistor). Thanks.
Posted by yongeeks 5 years ago
Hi all, I would need your help with a project I have in mind... I've been at it in my mind for a while, but I'm getting nowhere fast, as I'm rather a newbie in electronics!! I did enlist a friend to help with that, though! ;) I would like to find a way to have the wind trigger the lighting/fading of a led, the same way one could do with a variable photo resistor (variable-resistor-wind-sensor-like, or could it be more slight-motion-based?). It needs to be compact and inexpensive, as I would need to make a whole lot of those. Ideally, it would be an analog sensor, but I am open to other ideas. No Arduino, though, please... I'm not there yet. Either one sensor for each led, or one sensor for a few leds at a time. It could be powered by an external battery. Any ideas? Thanks!
Posted by lodoiska 4 years ago
Fade Out is a system of "painting" an image on a photoluminescent surface with lasers. It was developed by Daito Manabe and Motoi Ishibashi and can create different shades of green depending on the timing of the laser. Check out the video below to see what I mean. The source image from the webcam is used for the image that's put on the wall. via pinktentacle
Posted by fungus amungus 8 years ago
I've seen several instructables for creating proximity sensors that will detect anything, but I want sensors that will detect only each other. Basically, I want to have LEDs inside tiny toys that will light when the toys are near each other, then fade and turn off as they are separated. Can anybody point me in the right direction? Thanks.
Posted by aliasjanedoe 4 years ago
I got me a new laptop, and it looks pretty boring. So I drew flames on either side of the keypad on the empty spaces. However, it doesn't seem to be permanent. When I keep my palm or finger on it for a long time, the color fades away. Any help on how to get it to be permanent?
Posted by (s)Aint 10 years ago
Hi all, Can someone show me how to make a car dimmer or point me in the right direction to make one. Just to recap this is like the new cars when you open the car the light fades up and when the car door is closed the light will take 5 to 10 seconds to dim out. Thanks in advance.
Posted by Dave-v-v 8 years ago
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.
Posted by aliasjanedoe 5 years ago
I just want to know because of recent topics, what do you know about me. And I know I see what I think people look like in my mind even though I've never seen them, so I was just wondering if anyone thinks they know what I look like. Please post anything, ANYTHING that will keep this topic from fading into oblivion before my curiosity is quenched. :D
Posted by tomonto 10 years ago
I recently came up with the brilliant idea (read: scheme) of constructing gloves with built in RGB LEDs that fade through colors randomly. I plan to sell these to ravers as they are usually spoiled rich kids (no offense) and I can fund my new found interest in electronics. My question is if anyone knows of any ICs that can control this without having to program it, like the LM3914 can work as a VU meter. If no such thing exists, then the cheapest alternative.
Posted by wootwootman 8 years ago
For example, I got my avatar by deciding to do something to the normal "no picture" picture. So I used GIMP to add a pasted picture of fire in another layer, did some strategic cutting, then used the Pen set on fade to add shadow behind our poor immolated bemowhawk'd "no picture" fellow. What did you do to arrive at yours?
Posted by Rishnai 10 years ago
A while back I designed this circuit, and to my knowledge it should work, but I just want to get a second opinion. It is a game in which there is a circle comprised of 12 LED's and the goal is for the user, to press a button, and stop clock so that the green LED in the circle is lit. There is another switch in the circuit so that the user can reset the game at any time. I'm sorry that the picture is very faded and a bit cluttered. Any help is appreciated, thanks!
Posted by FrozenStar 7 years ago
I'd like to build something similar to the 'Krazy Eyes' product from Tripage ( http://www.tripageled.com/PAGES/600rr07.htm#KrazyEyes ) and would like to have it fade out or turn off after a few minutes after the ignition on the bike is turned off.I'm an electronics NOOB (honestly, can't read diagrams or anything) but I do know that a capacitor may work to keep the LEDs on a bit after the bike is turned off.Thanks for any insight into this issue!
Posted by halconnen 10 years ago
I tried painting a black cloth jacket with white acrylic paint. I painted two layers of paint on it, which I thought would be enough, but later, it started to fade. And after a wash, it was a pure disaster. So I am planning on painting another jacket, so this time, I want it to be perfect. Any tips to preserve the design, or how to paint it, blah blah??? Thanks a load (if help shows up). PS I ve added a pic of my jackets current condition
Posted by nk97 7 years ago
Hello I am wondering if there is someone who can help out a super beginner. I need to write a code that will allow me to type send a serial message to the micro (im using an arduino uno) to be able to set PWM port to a certain percentage thus changing the fade of an led. I would also like the program to echo back to me a text string indicating what has been done. Is there anyone who can help?
Posted by JonH23 3 years ago
Hello all, I'm very new to Arduino programming, and was trying to write a basic sketch to flash some LEDs in a jack o lantern for halloween, but I'm struggling with the code. Essentially what I wanted to accomplish was blinking a LED from pin 13 x times, followed by fading (pulsing) another LED from pin 9 x times and then repeat. If anyone would be so kind as to help me accomplish this, I would be very grateful. Thanks in advance.
Posted by SubEclipse 5 years ago
Hi, I need a piece of code that I can use to controll my christmas/Halloween lights this year. I would like the code to work with Vixen so I can sync the music to the lights. The controller that I have is normally open so if you have code you may have to tweak it so I can use the relays as N/C, lastly there are 6 channels. No fading. Any help is appreciated. Thank you!
Posted by iApple guy 5 years ago
I just went to flag an obvious SPAM posting. The flagging interface hung up, and took more than ten seconds to appear. It had the same kind of problematic delay as the new text editor box.I wonder if these long delays are actually related, somehow, to the pretentiously fancy "fade in" technique that's being used. A simple, and fast, pop-up would be much friendlier to the users, if not as sexy to the developer community.
Posted by kelseymh 9 years ago
Last night i went to a bar in brixton after seeing massive attack. In the bar there were frames on the walls with white paper inside and we were given LED torches similar to these LED Torch. When the torch is on you can use it to write or draw onto the frame and it leaves a glowing trail which slowly fades. I really want to know how its done, as it was very entertaining and quite trippy and i want to make one myself. If anyone has any ideas please reply.Cheers
Posted by jacknaz 11 years ago
Today I tried to delete two photos from my library to replace them with cropped versions. When I clicked the red X, the image faded and then the entire grid of images disappeared (which I think is normal). When it came back the image I tried to delete was still there. This happened when I tried to delete from the instructable editor and from my library (both "all tags" and a specific tag). I recorded a video of this bug: www.screencast.com/t/NDQ3OTNl .
Posted by PointyOintment 8 years ago
I am writing an Arduino program to read speaker inputs for a test station. I need only to know when a speaker lead is on or off. This will be done by using the fade and balance. Originally I was connecting the speaker leads to the analog inputs and could get a single line to work as a simple VU meter. Multiple lines gave issue. Since I don't need to know the actual level, just whether they are on or off I'd like the speaker lead to trigger a transistor connected to a digital I/O pin on the Arduino. Any thoughts or quick schematics on how to do this?
Posted by dbirky 4 years ago
I'm working on adding some visuals to my car, among them a LED ground effects kit. It uses 12v LED strings from BestHongKong.com powered by the car's aux power. I want to get it to pulse, fading in and out about once a second. I tried a 555 timer and a capacitor bank in parallel with the light array, but it doesn't show any difference (I'm guessing RC is too small to be even noticeable, so I might just need a larger bank). Anyone else have experience with this?
Posted by DeusXMachina 11 years ago
Hello *.*, I want to update my profile image. For this I login, klick on You and Edit Profile. After this I click Upload New Photo. After this I see, that the Upload new Image dialog fades in. But this happens behind the Edit Profile dialog. With the Chrome Debugger I moved the dialog by changing the css, so I can send a screenshot. If I click in the upload dialog then the edit dialog disappered. An upload does not change the profile image after this. I tired this with the actual Chrome and Firefox browser. In both the same. Any idea for me? Thanks Mark
Posted by DoItMark 1 year ago
Got bored and I thought this sounded pretty cool. What do you think? Superficial agony, mutilating shockwave, Flamboyant Armageddon will never behave, scintillating ball of fire, shimmering sea disappears without desire, pseudoscientific forumula, Timewave-zero is true.... Day after day, night after night, with much research it proves no one is alright... Pseudoscientific forumula, timewave-zero is true, This ball of fire has come out of the blue Awoken from self-destruction Realistic power reduction Nevertheless memories fade Anxious tempting till' the next day Breathless exhaustion, cannot breath Trapped in a jail cell, try to leave Never surrender, throughout this fight, But to think again, I just think I might. Today, I will learn against my will, This battle will cause a void to fill
Posted by Flumpkins 9 years ago
The page formatting has recently been updated so that not all photos in a group are displayed. Instead, there's an item to click, "Show all 8 images". I don't like this feature... I'm reading the article, why wouldn't I be interested in seeing the images? Alternately, is there a way to specify a "see all images" preference? I also don't like how now the images in the image sets fade in rather than just being images on the page. In general, the older style of images were much more functional. Sorry if I'm sounding like the grumpy old man complaining about the kids and their new-fangled Web 2.0 coding!
Posted by marhar 5 years ago
I made a new Instructables, my 4. Its called the LED Snake . Its made up of lot and lots and lots of LEDs in different colors, red, green and yellow. It can serve as any kind of decoration, or you can attach it to your car or bike and lots more.The LED Snake can be modified and hacked to blink , fade ... The lenght of the LED Snake is up to you, mine is 1m long! You can make this project under $ 10!To see how it is made and how you can make ti visit the instructables!https://www.instructables.com/id/LED-Snake/
Posted by comodore 10 years ago