Comments on: Let there be light

By: DP

DP — Tue, 02 Sep 2008 00:12:18 +0000

HI, i have several questions to ask.
1) how to connect the led to the dc power?
2) How do you place the acrylic plate probably?
3) Can u take a picture of the side of the FTIR screen. Like the place u put led. i wanna use it for reference.

By: George

George — Mon, 21 Jul 2008 16:00:38 +0000

Hi, thanks for the help.

I found a website that sells IR LED but there are like so many specs that goes with it.

What are the specs u used for your LED?

Wavelength is 880nm

What about the power dissipation, current foward IF, Voltage VF max and lastly angle viewing?

Sorry for this long question. Appreciate your help

By: Laurence Muller

Laurence Muller — Mon, 21 Jul 2008 12:21:38 +0000

@George:
Heya,

nothing special, just normal copper wires. You can get them at any electronics store.

By: George

George — Mon, 21 Jul 2008 12:17:36 +0000

Hi there,

Can i check with you what are the specs of the kind of black wires you used to connect the circuit up? I totally know nuts about electronics

By: Laurence Muller

Laurence Muller — Tue, 10 Jun 2008 10:36:15 +0000

@Vilen: No, these are low cost no brand 880nm IR LEDs.

By: Vilen

Vilen — Tue, 10 Jun 2008 07:00:53 +0000

Hi, are those Osram SFH485 leds?

By: agustindidiego

agustindidiego — Tue, 11 Sep 2007 21:04:20 +0000

Hi man!
This is a really interesting project.
I’m from argentina, and this blog inpulse me to make my own .
These weekend I was making some tests, just with some IR leds, a glass that I found in my home and a Genius VideoCam NB, I’ve to tell you that was really easy to remove the IR filter from this cam.
I download the touchlib, touchTracer and all it’s dependencies from they source, and compiled all. I found some problems here, because I download all of the last versions of the dependencies, but at last all works just fine…
The result of the test with the leds, glass and cam, wasn’t too much great, because was all on the fly, but the touchlib and touchTracer recognized some movements
I’ve to say that I’ve not to much knowgement about electronics…, and that I’m was searching a lot about making the arrays of the leds, and trying to understand why if you connect a led directly to the power, it just burn… , I was trying to get the same wiring diagram solution that you but it gives me other things…, the closest one was the same array but with resistors of 1ohms. Can you say me the specifications of the leds that you used?
The ones that I buy came without specifications, so I had to assume they…
Today I’ll start the project again, buying all the necessary things, and I’ll try to make it good, step by step. So, wish me luck!!!