PIR sensor PIC16f877

[delifadzli]

Hi everyone, I want to ask on how to deal with PIR sensor. PIR sensor is basically a motion detector that detect motion. So in this case, I would like use that sensor to act as as input to my ceiling fan controller (using LM35 sensor).

The problem is, this sensor only operates as the motion goes through. While in my project I would like to use it to detect the human that pass through the door which automatically turn on the entire ceiling fan controller. I wonder, as the human pass through the door like 5 meter away from the door...isn't the overall system will turn off? How to make it still be operating??? I just want to turn it off (overall system) if the human leave the door/room.

Easy to say, if someone entering the room overall system still on. If someone leave the room the system will be off.

Can anyone help me?


And another thing... if I want to implement counter...just implement it on the code? Or need to buy some hardware? Sorry for my weakness.

[delifadzli]

Here is schematic that I found regarding automatic light controller based on human detection.

So here I wanna ask...isn't ok to use this diagram by replacing AT89s52 with PIC16f877A and the InfraRed sensor being replaced with PIR sensor?

The schematic I found consist of transmitter and receiver part. I would like to eliminate the transmitter circuit and just use the receiver part ( Infrared sensor replaced with PIR sensor).

[delifadzli]

transmitter link : http://1.bp.blogspot.com/_3gu68B4AUcs/SyDtYYXVrdI/AAAAAAAAAAk/c5ln9WJ70lM/s1600-h/room1.gif

Receiver link : http://2.bp.blogspot.com/_3gu68B4AUcs/SyDtPpgx06I/AAAAAAAAAAc/dxzUCRw_zbk/s1600-h/room.gif