I've ran some tests today, you can view a picture by clicking here. I won't comment it but I think I'm gonna stay with a normal FTIR solution (there is no acrylic sheet yet, just a screen + a rail of leds).
Wednesday, November 28, 2007
Sunday, November 25, 2007
First test
I do not have an acrylic sheet so I used the screen itself. Like nima said here, using the TFT as acrylic should be ok. I wired 3 leds and here is the result (i'm sorry the quality is terrible).
The 3 dots are the leds, and you can notice blobs under the middle led. They are hardly visible, because there are 2 layers of IR filter and I forgot to remove one, but the blobs are visible when there is only one IR filter. Moreover, I have 5mm leds and the screen is 2mm thin...
The only problem is to avoid extra lighting. I used some basic paper, it stops IR very well and you can bend it.
I don't know how many leds will be necessary. My led model sucks (5mm, 940nm), but I'll try to continue with them. My next step is to build a led rail (25 leds) in order to run a real test.
The 3 dots are the leds, and you can notice blobs under the middle led. They are hardly visible, because there are 2 layers of IR filter and I forgot to remove one, but the blobs are visible when there is only one IR filter. Moreover, I have 5mm leds and the screen is 2mm thin...
The only problem is to avoid extra lighting. I used some basic paper, it stops IR very well and you can bend it.
I don't know how many leds will be necessary. My led model sucks (5mm, 940nm), but I'll try to continue with them. My next step is to build a led rail (25 leds) in order to run a real test.
Saturday, November 24, 2007
IR Webcam
Ok... it was pretty simple...
The first thing is to get this little screw by doing what they say here :
http://www.instructables.com/id/Making-a-Night-Vision-Webcam/
When you're done, all you need to do is to remove the small circle on the top (I used a knife).
There you go :
As you can see, this is the IR filter. Remove it with a tiny screwdriver (it is not glued) :
To block normal light, I used a small part of a floppy disk that I fixed on the other side :
The result, testing one of my LEDs :
That's all folks, have fun !
The first thing is to get this little screw by doing what they say here :
http://www.instructables.com/id/Making-a-Night-Vision-Webcam/
When you're done, all you need to do is to remove the small circle on the top (I used a knife).
There you go :
As you can see, this is the IR filter. Remove it with a tiny screwdriver (it is not glued) :
To block normal light, I used a small part of a floppy disk that I fixed on the other side :
The result, testing one of my LEDs :
That's all folks, have fun !
Friday, November 23, 2007
One week later...
There was a problem with the post office or something so I wasn't able to work on the project. Anyway, my order is home now and I'll start to set up the webcam tomorrow, in order to test the LEDs.
The webcam is a Logitech Quickcam Messenger. Some people told me that it is possible to make it work with IR but it's hard, so if I don't kill the webcam I'll post a review on this step. Maybe it will avoid some "unwanted effects" for those who possess this webcam.
The webcam is a Logitech Quickcam Messenger. Some people told me that it is possible to make it work with IR but it's hard, so if I don't kill the webcam I'll post a review on this step. Maybe it will avoid some "unwanted effects" for those who possess this webcam.
Thursday, November 15, 2007
Order #1
Ok, i'm not alone on this one thanks to the guys of the NUI Group community, so i'm gonna make a "FTIR" multitouch screen.
I bought 50 IR leds (20 €) in order to test some basics using a 15" screen (out of order, but it's not important). I bought a cheap webcam (logitech, 20€). I hope it will do the job.
The thing i have to keep in mind is that i wanna build a mobile touchscreen, so i'm not sure about the backlight (by mobile i mean something not to big, like a 30/40cm cube). A led based light source is what i wanna test, and i'm still trying to implement it.
In the meantime, feel free to participate !
I bought 50 IR leds (20 €) in order to test some basics using a 15" screen (out of order, but it's not important). I bought a cheap webcam (logitech, 20€). I hope it will do the job.
The thing i have to keep in mind is that i wanna build a mobile touchscreen, so i'm not sure about the backlight (by mobile i mean something not to big, like a 30/40cm cube). A led based light source is what i wanna test, and i'm still trying to implement it.
In the meantime, feel free to participate !
Subscribe to:
Posts (Atom)