| « Multitouch Display: a plexiglas case for the LCD FTIR multitouch (part one) |
| Multitouch Display: CD burner infrared laser short test » |
Multitouch Display: a plexiglas case for the LCD FTIR multitouch (part two)
Look at this, isn't it wonderful?!?!
Yessss!!! It looks very very nice!
Anyway, of course it is still to be completed, I need to prepare all the braces for the circuit boards, the bracket for the webcam and, of course the infrared setup and the front mask.
So, let's start with this second part of the construction notes!
After bending all the parts, I had to refine them because, as I said, I abounded with measures because I was not knowing how much material I would loose with the bend. In this phase I discovered how useful is the circular saw for the Dremel instead of the electric hacksaw that I used to cut the parts before. The advantage of the circular saw is that it can make very straight cuts and you will have better result.
So, basically I cut again quite all the sides of all pieces of plexiglas refining them to the right size, then I started to try to put all together and see what was needing to be accomodated.
Once I got the situation where all pieces were complying well together I started with the holes for the screws. As I said in the previous post, I decided for the most difficult assembly solution: screws on the edge of the plexiglas.
There was a lot of difficulties: the first one is to keep the drill parallel to the edge all along the hole just using the hands, the second one may be to drill the hole without melt or break the polystirene ecc. Other than these issues, I had also a lot of oblique sides that means oblique holes!
I have to admid that it was really taugh but, luckily I had good results. I used a 1,5 mm drill bit for 2 mm screws. I made a lot of tests on spare polistyrene pieces to understand how I could drill it without melting it. At the end of the game I decided to don't care about the melting plastic!
I just regulated the Dremel to the slowest speed and made all the holes keeping the Dremel in position just by hand.
As last step, I refined all the edge sanding them with fine-grained sand paper and a little bit of polish in order to have smooth edges.
That's all folks!
In the next days I should have time to go on with the bracket for the webcam and all the infrared stuff for the FTIR.
To be honest I put on hold the order that I prepared for the IR LEDs, this is because I saw this great post from AlexP that is changing everything. Basically he is not using any plexiglas for the FTIR but he was able to spread the IR light from a laser into a flat surface with a cylindrical lens! Great idea!
With this method his multitouch display is able to detect a finger just befoure (1 mm) it touches the panel so to achieve a "zero force" touch!
I'm totally fascinated by this idea and I'm actually thinking about to change on the fly my project and order a IR laser LED instead of the "normal" IR LEDs that I was ordering, as well I would not use any plexiglas for the FTIR.
I'll update you ASAP, stay tuned!
Yessss!!! It looks very very nice!Anyway, of course it is still to be completed, I need to prepare all the braces for the circuit boards, the bracket for the webcam and, of course the infrared setup and the front mask.
So, let's start with this second part of the construction notes!
After bending all the parts, I had to refine them because, as I said, I abounded with measures because I was not knowing how much material I would loose with the bend. In this phase I discovered how useful is the circular saw for the Dremel instead of the electric hacksaw that I used to cut the parts before. The advantage of the circular saw is that it can make very straight cuts and you will have better result.So, basically I cut again quite all the sides of all pieces of plexiglas refining them to the right size, then I started to try to put all together and see what was needing to be accomodated.
Once I got the situation where all pieces were complying well together I started with the holes for the screws. As I said in the previous post, I decided for the most difficult assembly solution: screws on the edge of the plexiglas.
There was a lot of difficulties: the first one is to keep the drill parallel to the edge all along the hole just using the hands, the second one may be to drill the hole without melt or break the polystirene ecc. Other than these issues, I had also a lot of oblique sides that means oblique holes!
I have to admid that it was really taugh but, luckily I had good results. I used a 1,5 mm drill bit for 2 mm screws. I made a lot of tests on spare polistyrene pieces to understand how I could drill it without melting it. At the end of the game I decided to don't care about the melting plastic!I just regulated the Dremel to the slowest speed and made all the holes keeping the Dremel in position just by hand.
As last step, I refined all the edge sanding them with fine-grained sand paper and a little bit of polish in order to have smooth edges.That's all folks!
In the next days I should have time to go on with the bracket for the webcam and all the infrared stuff for the FTIR.
To be honest I put on hold the order that I prepared for the IR LEDs, this is because I saw this great post from AlexP that is changing everything. Basically he is not using any plexiglas for the FTIR but he was able to spread the IR light from a laser into a flat surface with a cylindrical lens! Great idea!
With this method his multitouch display is able to detect a finger just befoure (1 mm) it touches the panel so to achieve a "zero force" touch!
I'm totally fascinated by this idea and I'm actually thinking about to change on the fly my project and order a IR laser LED instead of the "normal" IR LEDs that I was ordering, as well I would not use any plexiglas for the FTIR.
I'll update you ASAP, stay tuned!
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| « Multitouch Display: a plexiglas case for the LCD FTIR multitouch (part one) |
| Multitouch Display: CD burner infrared laser short test » |
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sei bravissimo...una domanda.. quale di questi metodi mi consigli? usare il mio lcd (senza dover comprare un proiettore) oppure costruirmi un tavolo touchscreen?
un'altra domanda..� possibile fare tutti e due con un solo pc??...grazie
Hi Blaxwan, im sure you are a regular visitor o nui forums, but i wanted to ask have you experimented with the new LLP(laser light plane)technique, it looks promising
@DelsaDj
Grazie! Se hai la possibilità di acquistare un proiettore e costruirci un tavolo multitouch puoi realizzare cose sicuramente più interessanti. Considera che con sistemi di questo tipo, le dimensioni elevate danno molte più possibilità di interazione, anche da parte di utenti multipli. Con LCD invece diventa molto più problematico andare oltre i 19-22 pollici, anche se, per alcuni versi la costruzione si semplifica. Per quel che riguarda il PC non cambia nulla: proiettore o LCD avrai comunque un'ingresso VGA e un'uscita USB/Firewire dalla webcam.
Ciao
@Sharath
You got the point! Yes I saw the great work of Alexp on LLP and I'm really interested in experimenting it on my new LCD multitouch, actually I'm looking to find a suitable IR laser and a cylindrical lens. Did got any informations about how to find them?
Thanks!
grazie 1000!! una domanda.. per fare lo schermo, lo stucco spray va bene lo stesso? quello già pronto...
@DelsaDj
lo "stucco" spray sicuramente non è adatto. Forse intendi il silicone spray. Da quel che ho letto nel forum del NUI ci sono pochi silicone adatti allo scopo, ti conviene cercare nel forum e individuare il prodotto giusto per non sprecare soldi e tempo.
ops...non volevo scrivere stucco... :P
forse è meglio che seguo il tuo video e faccio come hai fatto te..e complimenti ancora per il tuo lavoro...se volessi aprire un forum in italiano sul multitouch io ti darei una mano..ok??
@DelsaDj
...questa non è una cattiva idea...anzi! Pensiamoci su, magari contattami sull'email (nella pagina About).
Grazie!
Hi Blaxwan, your project is very interesting for me and I would like ask you on few quastions.
Firstly, I would like to know how big in inches is that LCD panel what you are using in your project. I think have 15 inches but I`m just guessing.
Secodly, your plexiglas case for multitouch is very good idea. Can you tell me dimensiones of this case and how you counted these dimensiones? I have plan build some kind of coffe table for mediacenter and I want to make it smell because i don`t like big tables with projectors.
Many thanks for answer and sorry for ma grammer, I`m from Czech Republic.
@Dronecz
Thank you. Yes the LCD is a small one, it should be a 15" but I'm not that sure (it may be also a 14", I should measure it). Regarding the plexiglas case size I'll try to publish the drawing with all the measures that I used to design and cut it. If you're planning to make a coffee table, mind that you will need to protect the LCD as it is very delicate. So you'll need a thick plexiglas layer on top of it to use as coffee table surface. The layer must be thick enough to not bend and break the LCD panel below. Let me know your progress!
Cheers