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Messages - davidjhi

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IR Pens / Re: Alternatives to Vishay Led.
« on: June 26, 2010, 07:11:36 PM »
Thank you shakespeare.

I have 2 questions.

Can you give a better price if i buy to you a lot of leds? (20 or more).

What its the price of the shipping to mexico?.

IR Pens / Re: Alternatives to Vishay Led.
« on: June 26, 2010, 03:22:29 PM »
Ok thanks.

The resellers in this forum can send the leds to mexico?.

But, the everlight leds, maybe can work. I see the radiant graphics, and the leds are similar.


The left image its the vishay led, and the other is the everlight led.

its very similar.

IR Pens / Alternatives to Vishay Led.
« on: June 26, 2010, 02:02:59 AM »
Hello guys.

I tried to make a whiteboard, its a very interesting proyect.

But i have a problem, i try with a lot of leds, and no one works  fine.

I want to buy a vishay led, but i cant find this kind of leds in my country (mexico), its impossible.

And i search for alternatives, i find this led:

Everlight PT331C.

Its like a clon of vishay 6400.


This led have 940nm of wavelength,  100ma, and 25 of view angle.

In the paper, this led its = to vishay....

This led might work fine??.


PD: Sorry for my bad english.

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