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58” Rear DI MT table box
Posted: 04 August 2009 03:29 AM   [ Ignore ]
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I am making this already a several month, using little free time after my working hours and sometimes weekends. it’s not finished yet.

Screen: 7D006 123x78cm (the sheet itself is 124x79 with 1 cm under the frame - 5mm on each side)
Projector: Sanyo PLC-WXE45
Resolution: 1280x800 native
Camera: Fire-i B/W with 2.1mm wide angle lens and OmegaBob2’s IR filter glued on the back side of the lens
IR emitters: self-made 29x3 cm 42 led x 6 (but have only 4 connected for now) powered from PC PSU
PC: Intel E8500, 4GB RAM, nVidia 9600
Box: alu frame with 8mm laminate walls (ordered at local furniture makers)

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table3.JPGtesting1.JPGinside.JPGarray_on.png
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My Blog: http://zviangi.blogspot.com with pictures and videos ....text in Georgian
22" LCD DSI coffee table
58" DI Table
FTIR table (my 1st) http://www.youtube.com/watch?v=mR90jjZNs8s

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Posted: 04 August 2009 03:46 AM   [ Ignore ]   [ # 1 ]
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Hey this is excellent!
What are your IR emitters? It seems that you can achieve a quite even illumination with those without much fuss. Do you have good blob detection on the corners, sides as well?

Greg

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Posted: 04 August 2009 04:14 AM   [ Ignore ]   [ # 2 ]
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IR emmiters are Vishay VSMG3700-GS08
Peak Emission Wavelength:850nm; Power Dissipation, Pd:170mW; Forward Current:100mA; Forward Voltage:1.8V; Viewing Angle:60 ; Package/Case:2-PLCC; Operating Temperature Range:-40 C to +85 C; Output Power, Pout:170mW
you can find them on Newark

I had a problem with IR arrays, they were getting very hot (look in this thread: http://nuigroup.com/forums/viewthread/6508/ ), but eventually, selecting a correct impedance of the resistors, solved more or less. it is not becoming very hot now.

My idea with IR light was to have even distribution of emmiters under the table, that’s why I decided to make long arrays, and the emmiters itself are quite powerful and wide angle.

I have changed the face of my 7D006 yesterday, now more diffused side is downside and more smooth side (for better touch feeling) upside. This makes blob detection more problematic, I have to lift arrays up and add more, I may even use my 48 led arrays, that I bought on eBay, for more IR light. before corners vere OK, when diffused side was upside, as you touch it directly, you have a best reflection, but that surface is like more skratchy and noisy smile

Next step is to mount heatsinks to the arrays. I have access to old computer warehouse on my old job, where I can get lots of P2 Pro heatsinks, they are long rectangulars, about 5cmx15cm; Also to fix camera and a projector, which is placed a bit higher, than it needed to be (I have some dark borders on the screen, the projector throw distance is not enough to beam all the screen). When I mount everithing I can you this box also as a wall, just puting it on a side.

Only one thing I would dream, is if multiple camera support will be made for CCV. i am not strong at programming, epscially, system programming, or I would make it by myself. Still trying to start experimenting with making some simple apps, to grow up, have some good ideas…

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My Blog: http://zviangi.blogspot.com with pictures and videos ....text in Georgian
22" LCD DSI coffee table
58" DI Table
FTIR table (my 1st) http://www.youtube.com/watch?v=mR90jjZNs8s

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Posted: 04 August 2009 09:58 AM   [ Ignore ]   [ # 3 ]
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Very very very nice setup, once the inside is as tidy as the outside this will be awsome!

Just love the extruded ally! rasberry

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Posted: 04 August 2009 12:01 PM   [ Ignore ]   [ # 4 ]
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You flipped the 7D006?  Why?  You want the layer which stops the projection image on top.  Then you will want to put a top layer of acrylic or glass over that to prevent it from becoming scratched.

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Posted: 04 August 2009 12:44 PM   [ Ignore ]   [ # 5 ]
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Lookin’ good zviangi :D

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Posted: 04 August 2009 01:49 PM   [ Ignore ]   [ # 6 ]
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great job man! i haven’t seen illuminator like this before
but why did you test it in dark place? with ir bpf you must not have problem with ambient light right?

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my 19” LCD setup ----> turned into new look
my 60” FTIR setup (old video)

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Posted: 04 August 2009 04:42 PM   [ Ignore ]   [ # 7 ]
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@ Peau: It’s really really necesary to use a acrylic or glass to protect the diffuser? or just to be sure, in case of ‘rude users’?

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Rear DI, in progress: http://nuigroup.com/forums/viewthread/6571/

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Posted: 04 August 2009 05:36 PM   [ Ignore ]   [ # 8 ]
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@PeauProductions:  so what’s the difference? I still will have a distance from the diffused surface… I did not think about additional acrylic, as it’s needed to be more strong than a regular acrylic, which is not available locally - means more international orders and lots of money smile and plus: diffuser down - I don’t have hotspots anymore, the glossy surface (which is upside now) did a quite a reflections from projector and IR illuminators.

@vahid: you haven’t seen, because I have designed them smile maybe people will make it taking mine as an example. in the dark? I don’t know, probably for camera...next time will make a video in lighted room…

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My Blog: http://zviangi.blogspot.com with pictures and videos ....text in Georgian
22" LCD DSI coffee table
58" DI Table
FTIR table (my 1st) http://www.youtube.com/watch?v=mR90jjZNs8s

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Posted: 05 August 2009 03:55 AM   [ Ignore ]   [ # 9 ]
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one maybe concerning thing is, that, the box is quite high, about 1 meter. I have designed the box in two parts, one smaller height part and base part, to “split” it in two pieces to fit through doors smile later, maybe i will make some “step around it, to sep up on it, when approaching to the table.

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My Blog: http://zviangi.blogspot.com with pictures and videos ....text in Georgian
22" LCD DSI coffee table
58" DI Table
FTIR table (my 1st) http://www.youtube.com/watch?v=mR90jjZNs8s

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Posted: 07 August 2009 06:19 PM   [ Ignore ]   [ # 10 ]
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some more video, with flipped 7D006

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My Blog: http://zviangi.blogspot.com with pictures and videos ....text in Georgian
22" LCD DSI coffee table
58" DI Table
FTIR table (my 1st) http://www.youtube.com/watch?v=mR90jjZNs8s

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Posted: 10 August 2009 12:16 PM   [ Ignore ]   [ # 11 ]
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Fernando - 04 August 2009 04:42 PM

@ Peau: It’s really really necesary to use a acrylic or glass to protect the diffuser? or just to be sure, in case of ‘rude users’?

A layer over the 7D006 protects it from getting scratched since it can be damaged easily.  I was able to run my finger nails over the stuff and make some very ugly marks.

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Posted: 10 August 2009 01:58 PM   [ Ignore ]   [ # 12 ]
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PeauProductions - 10 August 2009 12:16 PM

Fernando - 04 August 2009 04:42 PM
@ Peau: It’s really really necesary to use a acrylic or glass to protect the diffuser? or just to be sure, in case of ‘rude users’?

A layer over the 7D006 protects it from getting scratched since it can be damaged easily.  I was able to run my finger nails over the stuff and make some very ugly marks.

Thanks for the feedback Peau. Wich material can be used for this purpose, instead glass? (maybe glass has that sticky effect for the fingers)

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Rear DI, in progress: http://nuigroup.com/forums/viewthread/6571/

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Posted: 10 August 2009 02:30 PM   [ Ignore ]   [ # 13 ]
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Fernando - 10 August 2009 01:58 PM

PeauProductions - 10 August 2009 12:16 PM
Fernando - 04 August 2009 04:42 PM
@ Peau: It’s really really necesary to use a acrylic or glass to protect the diffuser? or just to be sure, in case of ‘rude users’?

A layer over the 7D006 protects it from getting scratched since it can be damaged easily.  I was able to run my finger nails over the stuff and make some very ugly marks.

Thanks for the feedback Peau. Wich material can be used for this purpose, instead glass? (maybe glass has that sticky effect for the fingers)

You can use anything clear, typically glass or acrylic.  If you plan on acrylic, make sure to get some with an abrasive coating on it.

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MT Website - A Collection of the Most Relevant Multitouch Info From These Forums
Multitouch Blog
Multitouch Parts Store - Buy Infrared Touch Frames (No Camera Needed!), Complete Modified Cameras and DIY Upgrade Kits, m12/CS Mounts, m12/CS Lenses, Infrared Lasers, LEDs, etc

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Posted: 10 August 2009 10:02 PM   [ Ignore ]   [ # 14 ]
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@zviangi:

Your table looks really nice; Could you show us another kind of applications? I mean, some application that can show how accurate it’s your table (just a suggestion, I’m curious to see how it works your MT). What are your next steps to improve your MT device? do you have in mind to develop appz’s or to do another MT device, with another technique?

thanks for share your videos wink

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Rear DI, in progress: http://nuigroup.com/forums/viewthread/6571/

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Posted: 10 August 2009 11:48 PM   [ Ignore ]   [ # 15 ]
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wow Z! it looks really nice! works pretty good too haha! i am also working on a rear DI so if I have any questions i will make sure to talk to you!

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