Pir sensor

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#1
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i want to interface a pir sensor with maximom 40m power os sensin how can i do that????

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What PIR sensor and to what are you interfacing it?

Leon

Leon Heller G1HSM

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PIR - Passive IR sensor.
Hi hmdtop,
By which interface?
Pls post ur PIR details also.
Svm Prasad

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panasonic has a large number of digital PIR sensors that are easy to interface and has different detection ranges

change without any change is no change ;-)

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hi all i realy dont know much about this kind of sensor please tell what kind of sensor is better and how can i use an avr sense an human
thank you.

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Quote:
how can i use an avr sense an human
It only works with LIVE humans. :?
Do you have a burglar alarm in your house? Then you probably have a PIR detector installed.

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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exactly i want to sense LIVE human :shock: :) a dead man can not be a bad man, by the way i want to sense a live human for 40 meter with avr in basic and i want to know how can i do such a thing that's really amazing to me and i want to do that.

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Buy a PIR from an alarm shop. They usually work on 12V and have a relay output that activates when the PIR senses body heat. (you can feed that into an AVR input)

Now, IF you wanted to make a PIR yourself then I would not recomend it as is it mostly analog electronics. The you need lens design etc.

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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Have a look at the Parallax sensor. It doesn't have the range you want, but it has lots of support info and is designed for hobbyist use. It'll give you some ideas.

Chuck Baird

"I wish I were dumber so I could be more certain about my opinions. It looks fun." -- Scott Adams

http://www.cbaird.org

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Quote:
Buy a PIR from an alarm shop

The commercial PIR are very low cost and with the relay dry contact output, that is the answer to meet your need's.

I'll believe corporations
are people when Texas executes one.

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zbaird wrote:
Have a look at the Parallax sensor. It doesn't have the range you want, but it has lots of support info and is designed for hobbyist use. It'll give you some ideas.

thank you, i'll see that

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js wrote:
Buy a PIR from an alarm shop. They usually work on 12V and have a relay output that activates when the PIR senses body heat. (you can feed that into an AVR input)

Now, IF you wanted to make a PIR yourself then I would not recomend it as is it mostly analog electronics. The you need lens design etc.

thank you my friend but i dont think i can find this range so i must made some thing that can sense this range 40 meter or amplify them.

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Quote:
i dont think i can find this range so i must made some thing that can sense this range 40 meter or amplify them.
20m seems to be a standard range. Most of the work is done by the lenses as far as I can tell ie wide or narrow beam.

You have set yourself up a pretty big job. I don't think that an AVR or any other processor will help as most of the work is analog design.

Perhaps this thread should move to the "general electronics" forum?

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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If range is the issue, then look at some of the Infrared
beam detectors. You will have to do a Internet search, but this type of product is common in the security/alarm environment. The beam detectors are usually seen installed across large openings such as a loading dock bay at warehouses. They are not cheap.

I'll believe corporations
are people when Texas executes one.

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thank you my friends but i'm really getting disappointed

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hmdtop wrote:
thank you my friends but i'm really getting disappointed

Ten seconds with Google gives...

http://www.tlc-direct.co.uk/Prod...

Ross McKenzie ValuSoft Melbourne Australia