Video Magnifier for my visually impaired daughter

I am in desperate need of the plans or any help in building a video magnifier for my daughter. The video magnifiers for sale are way outside my budget. They start around $1800. It would need to be able to be used through a tv or computer. Any help in this would be greatly appreciated.

Topic by The1pdub   |  last reply

Webcam (Logitech QuickCam communicateSTX) How can I install without software? (not wireless)

I have a webcam (as above) but the disc is missing so I want help to install it please. I want to use it as is and also to show my counted cross-stitch patterns on screen to make it easier to find and count the stitches. The patterns are very small print. Thank's in advance.

Question by craftyv   |  last reply

Bacteria-like projections when shining a laser through a magnifying glass.?

          I was recently shining my new green laser pointer through a magnifying glass, and the beam went through the little circle near the bottom of the lens that magnifies things more than the rest of the lens. The laser dot got very much larger, and there were odd little dark circles surrounded by larger, transparent circles. I also noticed the same thing, but with longer, oval-like projections instead of circles. What are these projections of? I'm guessing dirt, hair, bacteria, etc. Can anyone tell me? I want to know because it's a pretty cool effect and it would be cool to know if I'm looking at bacteria or something like that.

Question by ALogan97   |  last reply

How does a telescope work different from a camera lense?

How does a telescope work different from a camera lense? I'm specifically wondering about magnification. With a camera lense, a longer lense means higher magnification so to get really high magnification it needs a really long lense. With a telescope they just change the eyepiece to get higher magnification and don't change the length of the telescope.. How is it telescopes can change magnification like that and camera lenses can't?

Topic by Joella Erspamer 

tesla death ray and tower?

Can any one explain me working of tesla tower for wireless electricity transfer and his magnifing transmitter  and also how tesla death ray work????

Question by mihir.sahu.355   |  last reply

Making a bug collectors helm.

Does anyone know of some instructions to make a leather type cap with magnification glass or strange levers protruding out of it? I'd like to make something "weird-scientist"-like for my entomologist friend, Thanks! edited to spell "bug guy" correctly

Topic by Oakherder   |  last reply

Biological hackerspace in NYC

Yay! There's finally a hackerspace dedicated to biotech New York City. I'm kind of sad I can't drop by to visit any time soon, but I hope (fingers crossed) I can get the ever so popular caitlinsdad to go and report on it. There's even a promising $12 usb microscope (with 170x magnification) project going on! (Photo: Dave Mosher of

Topic by The Ideanator   |  last reply

Snow flake photos Any information on micro photos of snow flakes?

 Snow flake Photography I am looking for an inexpensive method to photograph snow flakes.  Possibly the combination of digicam and microscope could work.  System will need a dark back ground, illumination from above, magnification, and functionality at below freezing temperatures  I have seen some set ups but the parts alone cost in the hundreds. Any thoughts or experience good or bad would be appreciated.. 

Question by druggest   |  last reply

Any suggestions for a 5mm - 10mm telescope eyepiece?

I am currently using a home built 3'' refracting telescope, and want to build a shorter focal length eyepiece to get some detail for observing planets (lunar surface, rings on Saturn, more of the moons of Jupiter. The current setup uses a plossl eyepiece with about a 25mm focal length, giving 30 to 40x magnification, and allowing very clear viewing of the moon, and will pick out three of Jupiters moons on a clear night. Ideally I'd like a 5mm to 10mm focal length, for a 100 to 200x magnification. I've considered using the lens out of a DVD drive, which looks as though it could work, although I've only seen one example of it done before. I also have a selection of reasonable quality prisms and lenses about 1'' diameter, with focal lengths from about 2'' to 4''. So, how well would a DVD drive lens work, and are there any interesting designs that make an eyepiece with a focal length significantly shorter than any of its component lenses (in the same way the focal length of a plossl is about 1/2 the focal length of the lenses used). Thanks in advance for any help. (Would this get better response in the photography section)

Topic by The Skinnerz   |  last reply

Steam Engines? Answered

I am wanting to make a small solar steam engine and am wondering what pressures they run off of usualy? Can you power a pneumatic drill or grinder with steam and use it as a steam turbine? How do people make small boilers to power the steam engines? I was thinking a peice of copper, iron, or galvanized pipe. I would heat it with a fresnel lens from a rear projection tv. Can the spot from a fresnel lens me further focused with a normal glass magnification glass?

Question by snowluck2345   |  last reply

Is it possible to mirror a phone to an old monitor that i just found at the garage?

So, i work with small items that need magnification, i want to use my phone's camera to zoom in on the piece with a magnifier app while being able to view it on a screen while working. Is it possible to do it? If so, what will i need to make a DIY prototype of this? What are the parts that are required to pull this off? The materials i have are my smartphone and an old car display monitor(just the monitor).  Any ideas?? 

Question by kenrickrco   |  last reply

​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   |  last reply

Help! Thermo Electric Generator

Just wondering if any of you knowledgable folk can help me out. Of late I have experimenting with solar cells and energy production. I have been calculating some interesting results, many of which due to the use of lenses, magnification and mirrors etc. Alas this has led to more that on fried solar cell due to the temperatures im dealing with. Is there any practical way to obtain/construct a Thermo electric generator as pictured? I have spent some time with my friend Google, leaving me with little more than the notion that perhaps this technology is out of reach of the home experimentor. Think giant light cannon that can melt pennies. How can I harness this heat directly as apposed to, going the boiler/steam powered engine method?

Topic by Lftndbt   |  last reply

On a Microscope; Double Layer Mechanical Stage vs. a Mechanical Stage? Do both move on x & y axis? Answered

We are going to purchase a microscope on-line, I'm having a hard time deciding on the more expensive one w/ Double Layer Mechanical Stage, or the less expensive one with just plain Mechanical Stage in the description. They both look the same to me. They are both nice microsopes, binocular 40-2000x magnification, condeser lenses, iris diaphrams, the whole 9 yards. I dont want to have difficulty looking around in the objective feild for things like erythrocytes, monocytes, and the like, and I don't know what the double layer thing means. Any "Seasoned Pros" out there to give me some advise?  The Pics below are of the 2 choices. The left is the Double Layered Mechanical Stage, the 2 on the right are of the plain Mechanical Stage.

Question by Joe Smania   |  last reply

October Build Night with Dodocase at the Taipei Hackerspace

Hi everyone! We just had our recent Dodocase VR build night at the Taipei Hackerspace. I was a bit afraid beforehand because this is the first time we had a build night more around a complete product instead of a kit or parts, and was a bit out of ideas (beyond the ones mentioned in the announcement). It worked out pretty well, though, and a lot of people were interested in the kit and VR in particular, very useful for reachout. The projects made at the event: * Virtual Reality Kinetoscope Parlor * Low-magnification microscope * Recycling the packaging material for head mounts Attached some pictures from the results. We were also working on low-tech 3D viewing, such as printing images that could be used with the kit in the absence of a smartphone. Got some prototypes but they don't work reliably just yet. Need to figure out the field of view and positioning better. Cheers! Greg from the Taipei Hackerspace

Topic by taipeihackerspace 

Tarantula Defends Territory Against Owner; Owner Almost Blinded

Got a pet tarantula? Better protect your eyes ----------------------- WASHINGTON Fri Jan 1, 2010 10:53am EST WASHINGTON (Reuters) - Here's some advice stemming from the unusual case of a man who had spider hairs stuck in his cornea: Be sure to cover your eyes when hanging around with your pet tarantula. Ophthalmologists at St. James's University Hospital in Leeds, England, used high magnification lenses to find out what made the man's eye red, watery and light-sensitive, according to a study reported in the British medical journal The Lancet on Thursday. They discovered hair-like projections stuck in the man's cornea. It was a light bulb moment for the patient, who remembered that three weeks earlier he had been cleaning a stubborn stain on the glass tank of his pet, a Chilean Rose tarantula. "He sensed movement in the terrarium. He turned his head and found that the tarantula, which was in close proximity, had released 'a mist of hairs' which hit his eyes and face," the doctors wrote. They said the man's condition was rare. The authors noted that the Chilean Rose tarantula releases the barbed hair on the back of its body to defend against predators. "We suggest that tarantula keepers be advised to routinely wear eye protection when handling these animals," the doctors said.   ----------------------- Ok, so he might not have been blinded, but in theory, he could have developed a horrible infection that could have blinded him.  I'm listing tarantulas next to porcupines as pets to not own. Image Credit:  David Thorne  

Topic by AngryRedhead   |  last reply

Making a Micro Film Camera / Burner Answered

I'd like to get a roll of 16mm silver emulsion camera film and then transfer a HEAP of digitised documents to it for storage in hard copy, in the micro film format. I know how to do it, but doing it is a different thing. In fact I'd like to make the whole system, from scanning on a desk top scanner, and or, perhaps photographing documents directly. I'd like to be able to record digitised documents onto film and film to digitised documents. But the real need is to convert scanned in documents to microfilm - so we can forget the rest for the time being. I'd like to do just the conversion of digital documents to microfilm - but on the cheap, and I'd be prepared to compromise a bit of speed and other factors as long as the imagry was up to a reasonably high standard for documents. I will read up and contact these people and Kodak etc.. but I am also looking to improvise as I am on a limited budget and I guess it's really a case of finding a USB type projector with the lighting and the lensing that instead of putting it up on the big screen, shrinks the image to fit in a frame on 16mm film. That may require specialist imaging equipment, parts and very accurate adjustment. So if anyone knows how to do this on the cheap, it would be appreciated. Here is the more or less cashed up way of getting it all done, this covers it in a nutshell: Digital Document Archival to Microfilm    The Digital Revolution Digital imaging has revolutionized document management. Imaged documents occupy almost no physical space, can be easily secured, searched for content, or made centrally accessible to an office PC. With a proper backup schedule, digital documents can be safely stored for years. Digital Memory Loss Digital documents also introduce a number of new problems. Hardware, encoding and software obsolescence loom over any digital collection. Obsolete hardware can prevent access to the data itself. Digital document also require software to read, interpret and render documents in a meaningful way. Your ability to manipulate your documents could be tied to a proprietary file encoding which leave you few options if the software company goes out of business. Even migrating from one system to another creates the possibility of data loss. Digital Archival to Microfilm How do you save your digital documents from potential oblivion? Simple; convert them to microfilm. Microfilm has been a mainstay of librarians for the last century. Documents are eye-readable and have a shelf life of at least 500 years. Compare that to CD's which degrade after as few as 5 years or hard drives and DAT tapes that can degauss after only 20 years. With our digital archival services, you can have the best of both worlds; Instant access and long-term storage. Benefits of Digital Archival:     Eye readable with simple magnification     Archival longevity     Easily re-digitized

Question by Wroger-Wroger   |  last reply

That didn't just happen, did my oscilloscope die!?!? How??? Repairable????

I went to my workbench today to discover that my BK Precision 30MHz analog scope has stopped working. Symptoms: ❶  Still shows a trace ❷  The trace does draw across the screen*  ❸  The horizontal time base seems to work ❹  10x horizontal magnification seems to work ❻  XY mode only draws in the X direction ❼  Waveforms do not show up, for either chA or chB ❽  Triggering seems to work (it causes the trace to draw more/less frequently. No vertical deflection)  ❾   Vertical controls for both channels have stopped working ❿   Dual trace shows only one trace ⓫   I have not been able to do anything to make the trace move up and down, vertical deflection is definitely shot. ⓬   * When changing the timebase, I noticed that the length of the trace horizontally gets shorter, and when a signal is present, or the vertical position for the appropriate channel is twiddled, it becomes the right length, within certain ranges. ⓭    When I was reaching for a powerstrip to turn off power to the lab the previous night, I heard a loud buzz, similar to that of the degaussing on a old computer monitor, but louder. no sparks or anything were visible as I recall. scared the crap outta-me, and I could not figure out what had happened. First thought was that maybe somewhere there was a live mains exposed somewhere that had shorted to ground or neutral. That was quickly dismissed since nothing was exposed like that, and also it would have popped the circuit breaker, and instead would have sounded like a firecracker. This sounded more like a small transformer failing. Also the same day, I have been messing with a tesla coil circuit (my beefed up slayer exciter) and the probes were sitting here by not connected picking up interference. They were in 10X mode, I do not remember the volts per division, however. I do recall a trace being shown on the display the previous day. With these symptoms, I think the issue has to do with the vertical control on the CRT, and perhaps another, separate issue with the horizontal time base control, or possibly triggering. I think I might do a teardown on it to see if there is anything obvious that has failed, such as a charred coil. Then I will need to figure out what had caused the issue. It is obviously something gone horribly, horribly wrong with vertical deflection or something of the like. I will have a look at the schematic and see what I can learn about the operation of the scope. I am glad I do have the user manual and schematics, so it should be straightforward, it is a nearly 100% BJT design. The scope was used and old, and lacked a lot of features, such as cursors and frequincy counters. Perhaps it is time for a digital upgrade anyway...;_rd_s=desktop-1&pf;_rd_r=1VEC8M45MB2T9REXCR7N&pf;_rd_t=36701&pf;_rd_p=2079475242&pf;_rd_i=desktop

Question by -max-   |  last reply