oh duh, right. On Mon, Apr 13, 2009 at 10:51 AM, Ryan Reggio <[email protected]> wrote: > > maybe I'm thinking of the wrong thing. when he said projector i had an > image of an old over head projector, the same kind they used in school > classrooms and such. however maybe he was talking about something > else. if its one of those old overheads then all we need to do is set > the lcd (after taking it apart of course) on top of it. and viola > instant lcd projector thingy.... it should project a 15 inch screen. > however if the lens works on anything other than a 1 to 1 ratio then > it could be ether bigger or smaller... if its smaller then yeah wee > need another mirror... if its bigger though were all set.if i remember > correctly the over head projectors work by shining a light through a > lens, you set the transparencies on the first lens. then you had the > part that stuck up like an antennae. that part i think was made up of > two convex lenses and one normal mirror angled at 45 degrees. if thats > the case all we'll need to compensate for is the image being > reversed... which could prove problematic i suppose we could just tip > the overhead on its side after taping the lcd to the projector... that > way its projecting vertical rather than horizontal... lol but i guess > we'll see next saturday... > > On Apr 13, 9:37 am, Phil Smith <[email protected]> wrote: >> (bulb + 15'' lcd) == projector that needs a bigger mirror, or a way to >> work without it. The ones we have are 1'x1' >> >> On Mon, Apr 13, 2009 at 9:25 AM, Ryan Reggio <[email protected]> wrote: >> >> > i have another one we can use its a desktop monitor. its not all that >> > big but i think it will work for our purposes. i think its about 15" >> > or so. i don't know how big the surface of the projector is. however >> > that will limit how big the lcd screen can be as if its too big there >> > will be space that the projector doesn't hit with light. i would think >> > 15" or smaller would be a good place to start.having a screen that is >> > too small is ok but if its too big.... then we start to have problems. >> >> > -Ryan >> >> > On Apr 13, 8:14 am, Crusoe <[email protected]> wrote: >> >> Also, the other half of work involves a DLP or homebrew LCD projector. >> >> I have a overhead projector being dropped off today. Found it for $30 >> >> on craigslist. >> >> >> Next, we'll need another LCD monitor to take apart. >> >> >> -Daniel >> >> >> > backscatter was available for the camera to see. >> >> >> > So the next plan of attack is to either use a ir rimlight around the >> >> > display surface, and finger touches will break the internal >> >> > reflection, scattering light to the camera. Or mount some IR LEDs >> >> > underneath, and use these so that finger touches cause IR backscatter. >> >> >> > I found some VERY powerful IR Leds online, 0.5-3W. I will probably >> >> > pick up a few. >> >> >> > -Daniel >> >> >> > On Apr 9, 9:04 am, Phil Smith <[email protected]> wrote: >> >> >> > > Nice. I'll go see if I can't scrounge up a small mirror. >> >> >> > > On Wed, Apr 8, 2009 at 7:19 PM, Crusoe <[email protected]> >> >> > > wrote: >> >> >> > > > Just got the firewire camera in. 640x480, very nice picture. >> >> >> > > > I managed to scrape off most of the IR filter, and I found some >> >> > > > exposed color film negative to use as a visible light filter. I >> >> > > > suspect I will need to muck with it more at Saturday house. >> >> >> > > > -Daniel >> >> >> > > > On Apr 6, 8:37 am, Crusoe <[email protected]> wrote: >> >> > > >> So we have 2 solutions for image capture. Security cameras, and the >> >> > > >> firewire webcam >> >> >> > > >> RRegio: I think the Celeron box you have should be able to run the >> >> > > >> image processing/capture adequately. >> >> >> > > >> So all we need is the mirror. >> >> >> > > >> On Apr 5, 11:17 pm, Crusoe <[email protected]> wrote: >> >> >> > > >> > Meh, my laptop can run the software just fine. I have a firewire >> >> > > >> > webcam coming in. But yeah, we can try the security cameras as >> >> > > >> > well if >> >> > > >> > Ryan or someone can find a capture card. >> >> >> > > >> > Also, Ryan brought along these real cool microwave-based motion >> >> > > >> > detectors. All they need is power, and they output a signal on 2 >> >> > > >> > wires >> >> > > >> > when they detect motion. Someone with a voltmeter and basic >> >> > > >> > electronic >> >> > > >> > knowledge can probably figure it out. >> >> >> > > >> > The Dec box was powerful in it's day, but my notebook may be >> >> > > >> > faster >> >> > > >> > now. >> >> >> > > >> > -Daniel >> >> >> > > >> > On Apr 5, 4:19 pm, Phil Smith <[email protected]> wrote: >> >> >> > > >> > > I'm seeing a 65bit dec alpha box going by on freecycle: >> >> > > >> > > "Working, >> >> > > >> > > loaded with 64-Bit Windows NT(!). Floppy, CD, and Zip drives. >> >> > > >> > > No >> >> > > >> > > monitor, accessories or power cord." No idea how it stacks >> >> > > >> > > up, but >> >> > > >> > > hey, free box. >> >> >> > > >> > > On Sun, Apr 5, 2009 at 3:28 PM, [email protected] >> >> > > >> > > <[email protected]> wrote: >> >> >> > > >> > > > so those of you who were at the meeting yesterday know we >> >> > > >> > > > got a >> >> > > >> > > > prototype of the reactable semi-working. so in order to >> >> > > >> > > > actually get >> >> > > >> > > > it working in a respectable fashion we need a few things. an >> >> > > >> > > > appropriately sized mirror (about 15" x 15"), and a computer >> >> > > >> > > > capable >> >> > > >> > > > of running the software for image capture and analysis. i >> >> > > >> > > > have a >> >> > > >> > > > computer we can use for this purpose, however if anyone has >> >> > > >> > > > something >> >> > > >> > > > better (its needs to have at least one available PCI slot >> >> > > >> > > > for the NTSC >> >> > > >> > > > capture card) the computer i have is running win xp using a >> >> > > >> > > > intel >> >> > > >> > > > celeron d 3.06 ghz with 1-2 gigs of ram its a blank machine >> >> > > >> > > > so it'll >> >> > > >> > > > run pretty quick however we may need a bit more juice than >> >> > > >> > > > that. so if >> >> > > >> > > > anyone can bring something better i can just slot the >> >> > > >> > > > capture card >> >> > > >> > > > into it. any help will be appreciated. >> >> >> > > >> > > > -Ryan > > > >
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