AVR-Chat

Hi Raj,
 
I dun hav the circuit with me. I remember having the similar issue in AVR Chat and a gentlemen gave a website about this. Sorry I forgot his name but perhaps anyone here can help.
 
 
Regards,
Andrew

rajesh parwani <rajesh_almighty@yahoo.co.in> wrote:
hi andy ,
thanks for replying . it would be a privelege if u can send me some circuit to do that as cost is not a factor


Andrew Lim <normaxcite@yahoo.com> wrote:
Hi Raj,
 
Since u have lots of ambient light in ur working condition, I suggest u use ultrasonic which will solve ur problem.
 
Since u only need to control the distant at 3cm. Ultrasonic will be a good solution. However, I guess using ultrasonic will be at the expensive side in term of cost? Maybe I'm wrong.
 
 
Regards,
Andrew

rajesh parwani <rajesh_almighty@yahoo.co.in> wrote:
hi friends,
               im searching for the sensors which can detect barrier at a distance of   upto  3  cm  and not more . well my working condition  have lot of ambient light . i would prefer to fix the setting once for any lighting so that need not change it from place to place. please suggest me some way . should i go for ultrasonic sensor or the normal opto. if possible send me some circuit
 
regards, 
rajesh  

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