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 | last reply
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 | last reply
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 | last reply
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
Hi, I have 0.75, 1 and 1.5mm plastic opic fiber that I am using for my project (which will be the topic of my first instructables ;) ) I need a way to bend the POF in right angle. I don't care if the bending raidus is not very important (spec says max radius is 10 time diameter, 15mm radius is ok for me, and I don't care if I loose a little brightness). I want the POF to stay bend after I have bent it : it must keep the curve I gave it for at least 24 hours. I manage doing something not so bade (but really time consuming) by heating the POF with an hair dryer. I wander if anybody has a better tested idea ? (in the meantime, I'll try putin it in boiling water to see if it kep the shape once cooled). Regards, tReg.
Topic by treg | last reply
...my idea is to collect sun light with a parabolic reflector( e.g. an old satellite dish covered with mylar http://en.wikipedia.org/wiki/Mylar ) and piping it through optical fibers from the roof to my room. of course...there have to be a lense to concentrate the light.....anyone built stuff like this? reposts are welcome!
Question by soeren89 | last reply
I will try to write and instructable for my last project. Since this is my first instructable and it will be a bit long, I will need some reviewers before I can publish it. If some people can help reviewing, jsut tell me. I will laso need to find some super bright yellow leds which are really yellow, not amberish, or some high power RGB leds. If you can tell me where to find some (or send me a few one I can trade for some other colors or for plastic optic fiber), just let me know. I completely edited this message since I've found that it is possible to start writting an instructable without publishing it, so people interested in reviewing now have to tell me so I add them as contributors. Regards, t.
Topic by treg | last reply
Not sure if I have it or not - I "inherited" a load of tools recently. Thanks! DIYbabe
Question by DIYbabe | last reply
I have found a model of eschers waterfall on "think geek" but i appears to have sold out. does anyone know where to buy a new/used model of it? under £60 pounds would be perfect!!!!!!
Question by i3dpple | last reply
I'm working on building a lamp out of a guitar I'm using fiber optic cable as the strings and want to put leds under them to make them light up the lamps going to be plugged into a wall socket. what is the best way to do this.
Question by rabbitflinger | last reply
Hi I recently came across this instructable Search for " DIY light transmitting concrete" and I was wondering how I could make something similar but in the shape of a ball, or a light bulb, So I can have a LED inside it and have it shine and spin freely. Perhaps filling a tennis ball and drilling holes for light? Im ind of stumped on this one. any ideas???
Topic by scotteyre | last reply
OK, here is what I need:- Should be hard-drive based, an optical drive is not necessary.- Should record and play back at least 720p or 1080i from component or HDMI- Shall not require a subscription- Should be network-connected to play media files from one or more computers on the network- I'd really, really prefer not to use a PC for this - a standalone box would be best.Does such a beast exist? I'm going nuts trying to find something like this! It's sort of a "pick any three" sort of deal so far...
Question by jeff-o | last reply
I have a working plan to install 4 small leds(2 green,a red,and a white) in a 1/48 scale A-10 plastic model aircraft.I would like to have the red,1 green,and the white to all flash at the same time, with the other green to remain steady (for cockpit lighting).I just dont know how to wire it.I generally know what parts,and what voltage for the led's I need to get, I just need a wiring diagram.(this wire goes here,this wire goes there,etc.).I plan to install the red,green and white led's in the fuselage with either a small diameter clear plastic rod or fiber optic tube running to the wing tips and tail, with the other green installed under the cockpit floor. Can anyone help?? thank you.
Question by venom sixx | last reply
I really liked the red dot sight from CoD MW and MW2, so I thought that it may be possible to make one in real life. If you got some thin acrylic, only ~4mm thick (the clear colourless plastic kind) and a small laser pen inside the gun, you could have the laser shine up to a small point upon the acrylic. Or, you could adapt on this and have a very small laser unit on the base of the RDS (where it would clip onto the rails) hidden of course,and have it shine on to the acrylic. The one thing that I hate about the RDS is that you only have one bearing point. I don't see how it would aid you in any way, because one dot isn't enough to aim with. You would have to line it up with some other sight. Something which could work is an ACOG (advanced combat optical gunsight) where on each of the lenses is a bearing point which you could line up.
Topic by The Jamalam | last reply
Here's a good use of old radioactive material. Use it to expose Polaroid film to create some ghostly images of old items.Why would anyone do this? The author puts it out there pretty clearly:For some time I've been fascinated with the idea of reproducing these types of images in my home lab without great cost and with relative safety. As a collector of radioactive minerals and other ephemera, I decided that I wanted to use naturally radioactive materials as the source for my 'penetrating rays' rather than an amateur electrical x-ray machine setup.Polaroid film is readily available and it develops itself. However, a workable technique needed to be developed. How to expose the film for hours or days without the need for absolute darkness? How would I develop the film reliably after an exposure was made?The answer came from Kevin Clark of the Yahoo group, "GeigerCounterEnthusiasts". It was here that Clark explained his simple, yet reliable, technique for creating inexpensive Polaradiographs.Items you'll need: 1. A Polaroid SX-70, Type 600, or Spectra camera 2. A package of unexposed Type 600 or Spectra Polaroid film 3. One metal cookie tin at least six inches in diameter 4. A few sheets/roll of aluminum foil 5. Radioactive materialThat radioactive material can include:- Old, unused lantern mantles- Salt substitute or certain rock salts (Potassium Chloride)- Vaseline glass (plates, cups, or marbles)- Fiestaware plates and dishes- Welding rods- Old camera lens or vintage prescription eyeglasses (look for yellowed or browned optical glass)- Uranium ores and minerals- Exempt, unlicensed radioactive calibration sources- Radium containing clocks, watch hands, compasses, dials, and gauges- Tritium gunsights and keychain fobsCheck out the site itself for the full story. It's a good read with plenty of information about the history of x-ray photography.via Neatorama
Topic by fungus amungus | last reply