Thanks for posting the schematic.

So is the sync signal in HDMI the same as in VGA? As in a pulse that can be tapped into using this method? Or is HDMI synched via some code that must be deciphered by the display, which is then converted to a synch signal?

HDMI difficult signal. The personnel and impulses of a line are packed into packages.

hi sibboi and 3dnovice,

it's nice to see people are still interested in this. Too bad it's too out of date for most people. In some ways, the old analog signals were easier to work with compared to modern HDMI and other connections. Thanks for the skat sibboi. I'll take a look at it but for now I'll stick with the 555-only version but now that I'm building one of these I see that I need three 555 timers in order to do a better job since I want a phase shift that is just under 180 degrees. I should post some details when I'm done.

hahaha, I'm watching tv now and a character on the show I'm watching ("Psych") had a cat named "Chairman Meow". Hilarious.

Hello, iondrive. It will be better to make on SN74LS74, and 74LS00 the phase shifter with provisions of 90,180,270 degrees.

Have you guys thought of using two DLP projectors in a stack and a dual output video card to split the 3D to the two units and a filter system to game with ?? you get no flicker at all, both eyes see 3D un-interupted. if you use 720p dlp units you can run at 60hz.. we talked some about it in other threads and over at AVS forum. ive been playing call of duty on my rig like this.

It's well known but dual projectors are another setup. I use dual projectors myself (silverscreen+linear pol) and haven't had too much luck with interference filters when i tried (too much light is killed, the hazzle of colorcorrection which in all makes the hotspotting and ghosting to be a minor issues). I believe the amount of success with interference filters depends on the colorspectrum of the projectors used. On the plus side i have to say that the ghosting was more or less entirely gone with the dolbyfilters.

i agree that the dolby filters have major issues with color, polarizers can have ghosting and you need a silver screen. there is a better alternative to both, on ebay there is a filter kit called omega 3d, it is the same system as panavision 3d ( not well known ) it dose not need a silver screen and has very minimal issues with color if any and is higher in efficiency than linear polarizers. all the color correction needed with the dolby system reduces the output. not to just promote the system but mainly to show people there is a better alternative.
here is a video showing something about it

http://www.youtube.com/watch?v=10xwnUi5 ... ure=relmfu

not everyone will want to go to dual projectors but it is the best setup for bright no strain 3d

I had the impression that the omegafilters works exactly the same as the dolby and infitec system so they should practically suffer of the same kind of phenomenas (in the video the omegas looks very similar to the dolbyglasses). Do you know anyone who have such filters? (I could be wrong but i think Blackshark tries a setup with omegafilters but in that case i don't know about his impressions yet).
For now i have everything with 3d "hanging" because i don't like to degrade the experience for the stuffs available in the stores. Besides: Proper and futureproof softwaresupport is right now, least to say, pending for non-industrychosen "standards". I'm very curious of different technologies though. Are there any papers on the panavision system?

the omega filters are not like the dolby. other than they are optical filters on glass optics it is very different. here is a page i made about the system. mainly to explain how different projector spectrums effect the colors. dolby uses 6 bands, 3 rgb in one and 3 in the other. its an imbalanced color system. the omega ( that was branded panavision 3d but really made by omega ) splits the visible into 10 bands so 5 per eye making for even color and energy.

https://sites.google.com/site/passive3d ... inprolog20

here is a page with the same filter setup marketing under panavision

http://www.dpvotheatrical.com/Experience.html

you can actually buy the system unlike dolby/infitech, dolby dose not sell the projection filters to users like you and I, they are not the same as the eyewear filters.

its a long thread but here is a very detailed discussion with feedback on people who have it.

http://www.avsforum.com/avs-vb/showthread.php?t=1280393

that AVS thread is long, if you look starting around page 45 youll see the discussion about this.

or here is some direct feedback of guys who set it up

http://www.avsforum.com/avs-vb/showthread.php?t=1407101

@ motorman45: do you work for Omega or are involved with their business in some way? Some of your comments on that forum strongly suggest that you are.

Yes, but not only that i am the creator and engineer of the system, being an avid gamer starting in the 80's with 286 based pc's i am an avid tech nut. im glad the place i work for is offering it as a kit pretty affordable instead of only large cinemas being able to get this. i dont want to be a shameless promoter only get interested gaming and video fans be able to see far better 3d. dont take my word for it. you can see the user feedback, even the negaative in that forum. we did adress some issues with color for lcd type units and rectified any issues with those that bought ones made for dlp.

didnt mean to hijack the thread.
im really interested in the ideas started here. ill leave dual passive setups to other threads.

so the idea of being able to alter the timing of the signal for refresh rates is one thing but what about adjusting the time on/off. i know there is a tradeoff with ghosting and flicker but the brightness levels are really effected by this.
ive seen that some shutter glasses work on a 25% open 75% closed or off time. modifying that would also reduce the sense of flicker too i would think ?
any thoughts..

@motorman45: Thank you for the info. I spend way too little time on the avs forums.

As a fog - a question with points 3D VISION / it is necessary to know their schedule of switching.