AVR-Chat

Here is a very nice AVR tutorial:

	http://www.ouravr.com/attachment/microschematic/INDEX.swf

Hi
  How can I improve the distance in which the IR transmitter would work perfectly.
  I want to detect the object between 0 to 10 cm. but now I just can detect it atmost from 4 cm.
  it is worth mentioning that I'm using a pack of IR (Receiver and transmitter).
  also I wanted to know the minimum pulse width in which the counter of ATMega 16 (timer/counter 1) will trigger.
  By special thanks 
  A.Gh

       
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[Non-text portions of this message have been removed]

> Hi
>   How can I improve the distance in which the IR transmitter would work
> perfectly.
>   I want to detect the object between 0 to 10 cm. but now I just can
> detect it atmost from 4 cm.
>   it is worth mentioning that I'm using a pack of IR (Receiver and
> transmitter).
>   also I wanted to know the minimum pulse width in which the counter of
> ATMega 16 (timer/counter 1) will trigger.
>   By special thanks
>   A.Gh

  Which kind of IR transmitter and receiver are you using?  There are a
lot of answers to this question, probably only one with be useful to
you. :)

DLC
-- 
Dennis Clark
TTT Enterprises

Tell us more about the IR module. What manufacturer and model? What  
circuit/components do you use with the receiver? How do you drive the  
transmitter?

Jim



On Jan 31, 2008, at 12:45 AM, Ali Ghadirzadeh wrote:

> Hi
> How can I improve the distance in which the IR transmitter would  
> work perfectly.
> I want to detect the object between 0 to 10 cm. but now I just can  
> detect it atmost from 4 cm.
> it is worth mentioning that I'm using a pack of IR (Receiver and  
> transmitter).
> also I wanted to know the minimum pulse width in which the counter  
> of ATMega 16 (timer/counter 1) will trigger.
> By special thanks
> A.Gh
>
> ---------------------------------
> Be a better friend, newshound, and know-it-all with Yahoo! Mobile.  
> Try it now.
>
> [Non-text portions of this message have been removed]
>
>
> 



[Non-text portions of this message have been removed]

I am using cny70 pack of IR Sensors
  http://www.disam.upm.es/cybertech/Nacional/Documentos/Componentes/CNY70.pdf
  and I'm connecting the transmitter directly to one of the ports of AVR and it is on for 900us and off for the 100us.
  and the out put of the receiver is connecting to the "T1" (counter1 input) . 

       
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[Non-text portions of this message have been removed]