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 --~--~---------~--~----~------------~-------~--~----~ Website: http://saturdayhouse.org/ Post: [email protected] Unsubscribe: [email protected] -~----------~----~----~----~------~----~------~--~---
