fibre optics

Hello, Hope to find here some information about Optical Fibres. I am building an under water housing for DSLR. I want to use it just under the water surface. Controlling (through an air bridge) and exposure (through optical light guide) are on land. The question is about optical fibres. I need a 160 cm long Fibre Optic Lightguide. A 1/4 inch diameter guide costs near 200 GBP. When I would make one myself of 1/2 inch diameter, I could safe 75 % + the entrance surface is more than 3 times larger, which is important, since I will have to guide the light of a flash gun! BUT, I doubt wether such a diy bundle of 1,5 mm diameter plastic fibres from ebay will give me roughly the same or preferably more light output as/than a professional guide? How do these plastic ebay fibres compare to professional or glass fibres in terms of light transfer efficiency? Any suggestions? If not, then a reference to another forum where they might be able to answer my questions, would be much appreciated.

Topic by butterflies55555 5 years ago  |  last reply 5 years ago

Optical illusions are fun

How many animals do you see?

Topic by Downunder35m 3 years ago  |  last reply 3 years ago

Jesus optical illusion

Does anybody know why this works, its so cool! Stare at the 4 dots in the middle for 30-40 seconds, then look at something like a white wall. Then blink, what do you see?

Topic by guyfrom7up 11 years ago  |  last reply 9 years ago

Optical Mouse Help!

I need someone to explain a typical optical mouse circuit to me using diagrams and such. I could do it myself but I only have one optical mouse on me at the moment so Id have to go to the store to get a really cheap one. I'm on the verge of a kipkay quality instructable!

Topic by emuman4evr 10 years ago  |  last reply 7 years ago

optical pulse oximeter

Hello everybody, I have a big problem. I want to do for the optical pulse oximeter project was a link posted here.  I need the code and the circuit diagram in there to do the project. this is an emergency. can you help me please? Can you at least provide me access to people who share the project's e-mail address? thank you and I am waiting for your help. my e-mail adress:

Topic by mervebdk 3 years ago  |  last reply 3 years ago

Freaky Optical Illusion!

Here is a cool optical illusion I got in an email:'The Brain'This is quite amazing..If you see this lady turning in clockwise you are using your right brain. If you see it the other way, you are using left brain.Some people do see both ways, but most people see it only one way.See if you can make her go one way and then the other byshifting the brain's current.BOTH DIRECTIONS CAN BE SEENExperimentation has shown that the two different sides, or hemispheres,of the brain are responsible for different manners of thinking.The following table illustrates the differences between left-brain andright-brain thinking:Left Brain Right BrainLogical RandomSequential IntuitiveRational HolisticAnalytical SynthesizingObjective SubjectiveLooks at Looks atparts wholesMost individuals have a distinct preference for one of these styles of thinking. Some, however, are morewhole-brained and equally adept at both modes.In general, schools tend to favor left-brain modes ofthinking, while downplaying the right-brain activities.Left-brain scholastic subjects focus on logical thinking,analysis, and accuracy. Right-brained subjects, on theother hand, focus on aesthetics, feeling, and creativity.If you look away, she may switch from one direction to the other.I found that if I just look at her feet or relax and look at the floorwhere the reflection shows, she will switch direction!

Topic by Arbitror 10 years ago  |  last reply 9 years ago

Fibre optic tree?

I want to run my Christmas fibre optic tree without the motor.  Would I have to alter anything, its lamp is 15w 12v?

Question by eileenlilley 2 years ago  |  last reply 2 years ago

Refinishing Optical Media

I was thinking about ways to actually get good data off of a fucked disk. I figured for a permanent solution, instead of grinding the disk down, or filling it in with greasy things, actually reforming the surface of the disk with some clear resin or acrylic. Comments?

Topic by Crash2108 12 years ago  |  last reply 12 years ago

a DIY optical port

I have been intrested in optical computer for a while but found them rather expensive to build so I tried to look for cheaper ways to build some key features like the gates. The basic idea is to use solar cells that power a led. For and OR-Port you use solarcells where it is enough that one of the side gets light to make the led burn. To make and AND-port, you can put a resitor in between so that it really needs the power form both channel sot make a led burn. For a NOT-port you put an invertor in, so that when it burns it gives no signal, and wheren it does not receive light it burns this because of a battery it caries. A NOT-port is almost like a led-throwie.I do hav emore but wanted to know if this would be a good place or not, or if someones intrested in hearing on how to build a full optical computer, still basic, but almost completly optical, or if it would be better to post this on the microprocessor group at the opencourseware of the MIT ?

Topic by Floris Vermeir 11 years ago  |  last reply 11 years ago

Plastic Optic Fiber

Hi, I made a lot of research in order to find some plastic optic fiber in europe, and I finaly add to buy some full rolls of the one I liked. It it PMMA fiber with 0.3dB/m light loss, it polish well, and when use with long length, gives a sligher yellow / green color to the light (noticeable on white light, but really lower than the other I've tryed). If someone need some, I can make a kit with : -27 meters of 0.75mm diameter -15 meters of 1.00mm diameter - 7 meters of 1.50mm diameter I think thati ncluding shipping to anywhere I can send it for tens euros. If someone is interested, let me know and I will check shipping price and paypal fees. Regards, tReg.

Topic by treg 10 years ago  |  last reply 8 years ago

Optical Image Stabilization

Hi everyone, I have a little awkward question here but I am sure someone who knows a little bit more about electronics can give me good advice. I took apart the lens from a consumer video camera and took out the Optical Image Stabilization module in an effort to figure out how it works and possibly hijack the signal so I can control the movement. In the camera this module is getting the signal from the accelerometer so it knows how to engage the two electromagnets and counteract the movement (shaking). What I have done is take the leads that go into it and try to fake what gyro sends to this element. So far I have noticed that when I short 1 and 2 or 3 and 4 the element goes to one side or up. So I put a potentiometer on it (2K ohm) and it gives me some control by turning the dial, but not good enough. Has anyone any idea how can I achieve a gradual movement of this lens element vertically and sideways with a slider or dial of some sort? Your help would be greatly appreciated!

Topic by Sudija 11 years ago

10 Optical Illusions in 2 Minutes

The new advertising is a little longer, but a little more entertaining as this short video is a good example of. I don't care much about getting a new phone, but kudos to Samsung for making a playful video that compiles some classic optical illusions.via Techeblog

Topic by fungus amungus 11 years ago  |  last reply 10 years ago

mouse reassembling

How to reassemble a broken optical mouse?

Topic by krishna_ei 9 years ago  |  last reply 9 years ago

private video?

How do you watch a private video as in this link?:

Question by ehagins 6 years ago  |  last reply 6 years ago

does anyone know how to make a scanimation with type?

Question by Luferepe 6 years ago  |  last reply 6 years ago

CD/DVD Rom motors. Answered

There are three motors in a CD or DVD Rom unit. Does anyone know the operating voltage of each motor? Thanks

Question by ajax70 9 years ago  |  last reply 8 years ago

magic town

I visited the sculpters shop in manitou springs colorado micheal gorman there is an unbelievable display called magic town, in the model building have scenes within the building which change between two scenes there appears to be a glass panel, at 45 degrees some of the objects in the scene are attached upside down and when the scene changes they appear in the next scene there are small light bulbs which go on and off as the scene changes his is not a good description but can anyone explain to me how this is done its driving me crazy

Topic by oldgiza 6 years ago  |  last reply 6 years ago

How can I get from HDTV optical digital to analog volume controlled earphones??

My Toshiba HDTV has only one audio output, Digital Optical. I am hard of hearing and need to use earphones with volume control to listen while others are in the room. I believe a small, single purpose audio amp with digital, optical input and maximum volume analog output would do the job. No one builds such a device. The ones available have multiple options and resulting high price. I know how to read, BUT NOT DESIGN, circuits. I would prefer a design that would work off of a standard available "wall wart"/ Can anyone provide such schematic?

Question by chartsmalm 10 years ago  |  last reply 10 years ago

get me articles regarding mems technology?

Question by sarvesh2705 10 years ago  |  last reply 10 years ago

Group:Optical Illusions

 Heeeelllloooo!So i just wanted to talk about my group Optical Illusions,and yes I know it looks like there is 3 I's but it's actually 1I and 2L's.This group is about magic or DUH optical illusions.Ibles and videos must come to me before published.I will post updates every Tuesday,Friday,or Saturday.If I have time any other days I will update.My only rules are if you try to post a bad video I might give you a warning first but the second time you try I will kick you out.Well that is all you need to know.Oh wait one more thing...I will change the picture every month. 

Topic by Knave125 9 years ago  |  last reply 7 years ago

Digital Out on an iMac?

So I have an iMac, running Vista. It's late 2009 version, newest with the exception of the new 27" models. I'm trying to connect the mini-digital out to the SPDIF  in on my audio amp. I bought a cable, and an adapter. It just doesn't work... The adapter works fine, seeing how it's just a hollow piece of metal and plastic. The cable is also working fine - I've tested it with my TV. The iMac has output, you can see it on the other end of the fiber. Everything I've checked seems to be working, and there's only one possible explanation I can think of. The iMac is transmitting with a different format. I'm new to optical audio cables, so If there is only one format, aka SPDIF and TOSLINK are the same, please let me know. And if they are not, can someone inform me on what I'm doing wrong and how to fix it?

Question by Padlock 9 years ago  |  last reply 9 years ago

Fiber Optic Illuminated Heels

I found these gorgeous Fiber Optic Illuminated Heels on Fashioning Technology.  These heels from Anastasia Radevich's Kinect 2011 collection.  They are illuminated using fiber optic technology and turn on with switches placed at the ankels.

Topic by Carleyy 8 years ago  |  last reply 7 years ago

Extend optical mouse range

Hi all, I'm wanting to make a jig for a production project requiring a sensitive optical measure of movement with a focal length of 5-10 mm. I thought an optical mouse might be a good start but the lenses in a few I've tried require the device to be too close. It needs to be no bigger than the electronics of a mouse. If anyone has a lens that could be perfect or other ideas I'd love to hear them. Thanks, D

Topic by Qball007 6 years ago  |  last reply 6 years ago

How to use Fiber Optics?

I am making a super-discreet earpiece/IEM that is intended for any use where you feel bored, where you are not supposed to use electronic devices. Meetings, lectures, classrooms, etc. Basically, it's a 3.5mm jack wired to a Balanced Armature driver. Essentially, I remove the big, thick and bulky housings of earpieces and leaving the smaller drivers in place. I've been using thin copper cables in the earpieces I buy. They work, but are still visible. I found that optical cables are near invisible, glass-like. I intend to wire them into my earpieces. So, do I require lots of circuits? I can do those, if they don't poke a black hole in my wallet. No more than USD100, if entirely possible.  I just want to know how to change electricity into light and back again, and allow for audio transfer from MP3 player to earpiece drivers.

Topic by chua_erei 5 years ago  |  last reply 5 years ago

LDR or optical reflective sensor?

I am planing to make a line following robot without micro controllers. So I am using a light sensor connected to an AND GATE (the other input being the current to the motor). So since I am using" an and "gate I want the input current to be an absolute zero or some value ,ie the current should not be varrying with the light intensity. Besides I think I might drop the "and gate" thing and use an OPAMP instead as it would give me a varrying output current which is all I need

Question by chrissunny94 5 years ago  |  last reply 5 years ago

​Make an optic close focus.

I want to be able to put my night vision monocular in front of my 2x scope on my airsoft.I need a combination of lenses to put between my scope and the NV to let the scope focus at a couple of inches (instead of 30 feet), and reduce magnification because otherwise I’d just be looking at a tiny part of the phosphor screen heavily magnified.I know it’s possible because a commercial unit is available, I just don’t know if it’s feasible for a guy like me (doesn't have a degree in optics) to build (I'm thinking no, but I figured I'd ask).Thanks for any help you can offer.

Topic by instrucables360 11 months ago  |  last reply 11 months ago

Optics question; physics homework... Answered

Hi guys, There is a new physics teacher at school and he asked us this question: an object fell into a very dark hole in the ground and you don't have a flashlight, but the sun is 30 degrees above the horizon. Using a mirror you have to reflect light from the sun into the hole. In one case the hole is one meter deep and in the second case it's three meters deep. The question is: what angle should the mirror be placed in relation to the sun (or horizon) to illuminate the hole? I don't really remember how to calculate this so if you can help me that would be great. Thanks!

Question by Eunix 3 years ago  |  last reply 3 years ago

How to increase the viewing area of an optical mouse?

Hello, I'm just wondering if any of you guys knew how to make the viewing area of an optical mouse bigger. I have an optical mouse, and of course the viewing point is only as big as the hole for the laser is. I'm wondering if I can make it bigger, so if there was a sheet of paper, with the mouse under it, it would track something moving on the paper. basically like this finger-paper-mouse --- | >

Question by Deimos1 9 years ago  |  last reply 9 years ago

Help finding TOTX142L and TORX142L TOSLINK connectors?

I'm working on an audio project that uses optical inputs and outputs.  The components I really need to get the most out of this project are two 25Mbps TOSLINK connectors: TOTX142L (transmitter) and TORX142L (receiver).  Unfortunately, both are discontinued and I'm having a heck of a time finding either old stock or a comparable replacement!  I've tried all the major distributors (Digikey, mouser, etc) and have even sent out RFQs (request for quote) to various old-stock warehouses in the USA and abroad.  I've got a small lead on the receiver but the transmitter remains elusive. What really confuses me is the fact that there are still consumer products being manufactured today that use a device of this class, so where are these guys getting their parts??

Question by jeff-o 9 years ago  |  last reply 9 years ago

Researchers Play Tune Recorded Before Edison - Earliest Audio Recording Deciphered

This is a great story. In the 1850s, a Frenchman develops a device that records audio as optical data. With modern technology, we can playback his recording.Researchers Play Tune Recorded Before EdisonFor more than a century, since he captured the spoken words "Mary had a little lamb" on a sheet of tinfoil, Thomas Edison has been considered the father of recorded sound. But researchers say they have unearthed a recording of the human voice, made by a little-known Frenchman, that predates Edison's invention of the phonograph by nearly two decades.The 10-second recording of a singer crooning the folk song "Au Clair de la Lune" was discovered earlier this month in an archive in Paris by a group of American audio historians. It was made, the researchers say, on April 9, 1860, on a phonautograph, a machine designed to record sounds visually, not to play them back. But the phonautograph recording, or phonautogram, was made playable -- converted from squiggles on paper to sound -- by scientists at the Lawrence Berkeley National Laboratory in Berkeley, Calif.Check out the full article to listen to the 1860 recording.via eit and Rawhide

Topic by ewilhelm 11 years ago  |  last reply 11 years ago

Printing a Random Pattern on the desk

A couple of weeks ago, I bought an Ativa (Office Depot store brand) wireless mouse on sale for $15. It appears that they were clearing out stock, because they no longer list it on their website, but this is the closest thing I've found. I like the mouse, particularly because there is a built-in charger in the wireless tranciever for the two Ni-MH AAAs it takes. Yes, AAAs, the link is for a different mouse.Problem: Lousy resolution, I think. the wired Lenovomouse that came with my computer worked just fine on my smooth, blank desk surface, but this one requires much more of a pattern. I don't like mousepads. Scribbles with a pencil work well so far, but they smudge after a day or so. I want to put some sort of pattern on my desk for it to read. My best idea was a laser-cut random bitmap stencil and a can of black spray paint, but I don't have a laser cutter. Ideas?

Topic by CameronSS 10 years ago  |  last reply 10 years ago

How does the optics on the "Prayer Cross" work and how might I replicate that? Answered

I was interested in creating jewelry and thought that I could use this as a hard to find place for sensitive information.

Question by Xenel 9 years ago  |  last reply 9 years ago

how can i power a wireless optical mouse from usb so that there are no batteries?

I want to power my wireless optical mouse from the usb of my pc with a wire just for the power not the data , the usb has 5v and the mouse needs around 3 can i do it with just voltage regulator with resistances or i will need more parts

Question by geoper2 9 years ago  |  last reply 4 years ago

cheap & easy way to do optical mark recognition (omr) or crude image scanning / processing?

What's a cheap & easy but reliable way to scan a crude drawing or do omr - optical mark recognition - ie read marks on paper like the forms you fill out with a #2 pencil ? I envision something like a row of 8 lights sensors spaced to match the lines on a 3x5 index card, you feed the card into guides aligning the lines with the sensors. Or get some graph paper & scissors and cut out some 3x5 cards. Perhaps this could be a crude scanner to scan simple drawngs at whatever resolution matches the spacing of the sensors (width of drawing would be limited to # of sensors, the length limited to arduino's memory/storage). You could hand-feed a 3x5 card with a drawing through it, the horizontal resolution would be the spacing of the sensors, maybe have some kind of roller to track the card being fed through so it knows to scan another line. I know there are sensors used by line-following robots, but what about a simple light sensor? Or buying a cheap camera element and hooking that up to a video input and processing the image inside arduino? Or processing input from composite video? Any thoughts?

Question by apple-o 9 years ago  |  last reply 9 years ago

Which Direction Does She Spin?

Check out the optical illusion below. Since the figure is totally black, there's no depth- you can see her spinning either clockwise or counter-clockwise. Which way do you see it first? Try reversing the spin direction- moving your finger in a circular motion at the rate of rotation can help you reset. How easy is do you find it to swap perspective? Does it make your brain hurt?

Topic by canida 11 years ago  |  last reply 9 years ago

How to make fiber optic filament from fishing line? Answered

I am thinking of making my own fiber optic lamp / toy and was wondering if it was possible to make my own optical fibers from fishing line.

Question by devicemodder 9 years ago  |  last reply 9 years ago

How do I convert an optical mouse into a line sensor for arduino?

Question by ZiDB 5 years ago  |  last reply 5 years ago

In kipkays optical theremin, would you make the pitch lower?

Http://'m trying to play the sound through a 12 inch sub, and i need a lower pitch

Question by rickyd! 10 years ago

fiber optic star field without attic?

Is there a way to make a fiber optic star ceiling without an attic??

Question by tim13211 9 years ago  |  last reply 9 years ago

Optical fibre cable DAC chip??

Hey everyone,I'm trying to take an audio signal from an optical fibre cable pass it through a DAC0800LCN IC, 8BIT DAC chip and input into the Arduino. I'm trying to use a 3 pin fiber optica toslink transmitter to connect the fibre optical cable to the DAC chip. Does anyone know how to set this up or even if this would work? If anyone could answer this is would be much appreciated.

Question by MCsugar43 1 year ago

how to convert usb optical mouse to wireless

How to convert my wired optical mouse to wireless? please help me...

Topic by christin_meghan 8 years ago  |  last reply 8 years ago

can i use an optical mouse (through an arduino) as a pulse oxymeter?

Arduino can read coordinates from a mouse, a small example is in the following link But how could read color for using mouse as an pulse oxymeter? More than this we could use it with optical fiber adapted to the "eye" of the mouse for intravascular measuring ScvO2 !!!???

Question by clblue 4 years ago  |  last reply 4 years ago

New group started - Optic fiber

I'm read a lot of document about optic fiber, and I've seen that: -many people are interested in optic fiber (it's magic, just like leds are) -people make some good craft with optic fiber, but sometime don't have the needed understanding of how it works, how to cut it, sand it, bend it, ...) -reader of the nice instructables here have trouble buying optic fiber when they want to start new project. I hope this group will help people learning from eachother, leading to new more interesting project and instructables. tReg.

Topic by treg 10 years ago

Efficacy of cheap laser pointer optics

Are cheap laser pointer optical units suitable for adapting with high powerlaser diodes from DVD-RW drives. I don't have access to internet transactionsso I can't get a laser module.

Topic by volthead 9 years ago

fiber optic transmitter and reciever booster

I am a hobbist/inventor/sculptor/geek. I am looking for plans or a kit to build a fiber optic booster transmitter and reciever. Or even a unit that can send and recieve data and video signals. The signal must be able to travel a minimum of 300 ft. I am trying to build a submersible rov that I can afford. The other option that I might have is a rf to fiber optic converter. Would anyone be able to help me out?

Topic by batguanno 12 years ago

optical sensors from projection TV

I have a *lot* of junk from old TVs -  projection lenses, a fresnel lens and pcbs. so far I've only used caps and resistors in small projects. recently I came across a set of 4 optical sensors anchored to the inside of a projection TV, I believe they are used for auto alignment of the RGB images on the mirror. What is a good project to use these in? could I use them to possibly build some sort of solar tracker ? perhaps using an arduino ? any ideas appreciated.

Topic by dhymers 8 years ago

usb over fiber optic cable

My house was once part of a business that was connected to neighboring structures via fiber optics for Internet.  I want to put in a security system with some usb cameras and of course we know what those limits are.  I have successfully made 25' usb/cat5 cables using this site... they work great but I need 50 - 60'.  I was wondering if it was possible to utilize these fiber cables for the data side of the usb and somehow power it by other sources?  I know a little about fiber like putting in connectors and such and I do have 2 transceivers.  I can make rj45/usb connectors for the tranceiver ends but I'm just not sure of the details or even if I'm barking up the right tree.  I'm not sure where the power fits in either. Any of you geniuses know how I could do this? Thanks

Topic by cornflake000 9 years ago  |  last reply 9 years ago

Spring-loaded optical drive door?

Hello, I just build a new desktop PC and would love to have a spring-loaded door, with an eject button, to cover my CD/DVD drive, like the ones on HP or Acer computers I can't seem to find any sold commercially. Does anybody know how to build one?

Question by CanCB 8 years ago  |  last reply 8 years ago

Fiber optic cable to laser projector? Answered

I purchased a "Mr. Christmas" Laser (green) Outdoor Holiday Projector to add to my holiday lighting this year. Being rightly concerned with theft if I was naive enough to leave the projector outside, I thought of using fiber optic cable attached to the laser lens housing (still haven't worked out how I would accomplish that), and routing it from inside the house to a point outiside where the cable end would project on a wall or my garage door, providing a show (sans sound), but protecting the laser projector from theft. Is my idea feasible? If not, I'm open to suggestions. Thanks. 

Question by Oldie Juan Kenobi 2 years ago  |  last reply 2 years ago

Motor and base design for optical toys

Hello everybody! I'm in the process of building a reiteration of a series of optical toys (like this one, or these) with motor, stroboscopes and little music system. The thing is their discs measure about 1 m (like 3,2 feets) and one of them (praxinoscope) is a heavy one due to the mirrors it possess (see photo [it isn't it's actual state]) so I created a metal base for it with a tube, three metal angles as legs and washing machine 115v ~60hz 70W 250VAC single phase motor soldered on (with capacitor), so the disc sits on top of the motor, and the thing is that after an hour of so of being tested on continuous duty it stopped and started to smell like burnt. What could the problem be? Could it be a design problem since the motor has all that weight on top? Should I have used gears and pulleys? How can I make it last longer without it being to complex?  If someone can help or has some ideas I'd appreciate it , thanks in advance! Benkos M. G.

Topic by BenkosM 3 years ago  |  last reply 3 years ago