Circuit using simple IR for Object detection

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fireball003

Joined: 28 Oct 2005
Posts: 194
Helped: 5

05 Jul 2006 16:13 Circuit using simple IR for Object detection

Hi,
I want to make a simple object and obstacle detection system and interface with microcontroller. How can I do that?
How can I make a object detection circuit using simple IR emitter and detector ?

Thanks in advance.

ahmad_abdulghany

Joined: 12 Apr 2005
Posts: 1369
Helped: 212
Location: Cairo, Egypt

05 Jul 2006 16:34 Re: Circuit using simple IR for Object detection

Try this, it will help in shaa allaah!
http://www.picguide.org/

Hope it helps,
Ahmad,

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fireball003

Joined: 28 Oct 2005
Posts: 194
Helped: 5

05 Jul 2006 19:03 Circuit using simple IR for Object detection

Thanks for the link.

But I didn't get that sort of built IR system (Sharp GP2Y0D340K) in the local market. So i need to build it by myself.

Is there any circuit or procedure to make object detection system using normal IR ?

kender

Joined: 19 Jun 2005
Posts: 1231
Helped: 88
Location: Stanford, SF Bay Peninsula, California, Earth, Solar System, Milky Way

06 Jul 2006 17:53 Re: Circuit using simple IR for Object detection

You should modulate your IR transmitter with some frequency (typically between 1KHz and 40KHz is used, but there is pretty much no limit for the frequency). On the receiving side you should high-pass filter the signal before you do a detection. This is done in order to avoid the DC-interference from other IR sources such as the Sun.