8051 Microcontroller se PIR sensor kaise interface kre in Hindi

8051 Microcontroller se PIR sensor kaise interface kre in Hindi

8051 Microcontroller se PIR sensor kaise interface kre in Hindi:

PIR sensor kisi bhi object k motion ko detect krne wala sensor device hota h. Yha ham baat kr rhe hein k “8051 Microcontroller se PIR sensor kaise interface kre in Hindi”. To chaliye sbse pehle baat krte hein PIR sensor ki working k baare m.

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PIR sensor kya h

PIR means Passive Infrared Sensor.
PIR sensor kisi bhi tarike ka koi radiation emit nhi krta, ye sirf uske saamne aaye obeject se nikalti (emited) yaa reflect hui infrared waves ko detect krta h.
PIR sensor bahut se pyro-electric material k solid state sensors se bna hua hota h. Pyro-electric material ki khaas baat ye hoti h jab koi bhi radiation iske upr daala jaata h to ye energy generate krne lgta h. PIR sensor bnane k liye sbse jyada Gallium Nitride ka use kiya jaata h. Incoming radiations ko focus krne k liye sensor k saamne ek suitable lense lgaaye jaate hein.

8051 Microcontroller se PIR sensor kaise interface kre in Hindi

Jab koi bhi human yaa object sensor k saamne aata h to sensor pr incoming radiation ki intensity change ho jaati h, jisse PIR sensor ki generate energy bhi change ho jaati h. IS change hui energy ko suitable signal conditioning circuits lga kr suitable output voltage m convert kr liya
jaata h.
Dusre sabdo m kahe to jab koi bhi object sensor k saamne aata h to sensor module HIGH ho jaata h or jab koi bhi object nhi hota to module LOW rhta h.

8051 Microcontroller se PIR sensor kaise interface kre in Hindi

 

Ham yha pr PIR sensor module DSN-FIR800 use kr rhe hein jiski power ratings h, 4.5-5 volt & 60uA.
Normally jab koi bhi object sensor k saame nhi hota tab iska output 0 volt hota h or object k aane pr iska output 3.3 volt yaa kuch kam bhi ho sakta h.
Iski sensing range 7 meter or sensing angle cone 110° hota h. Iske module 2 resistive pot hote hein jinme se ek Delay time adjust krne or dusra sensitivity ko adjust krne m use hota h.

 

Circuit Diagram

8051 Microcontroller se PIR sensor kaise interface kre in Hindi

 

PIR sensor ko 8051 microcontroller k P0^0 se connect kiya gya h. Microcontroller k proper input (0-5volt) k liye yha transistor use kiya gya h.
Crystal oscillator (11.0592MHz) controller ka clock generate kr rha h or ek reset switch bhi use kiya gya jo controller kit ko completely reset kr deta h.
Jab bhi koi object sensor k saamne aata h tab microcontroller k liye Low input jaata h (kyuki Transistor use kiya hua h) or output pe LED ON ho jaati h or jab koi bhi object sensor k saamne nhi hota tb controller ke liye input High rhta h or LED bhi OFF rhti h.
Jab Module ki power supply ON kre to isko warm-up hone m km se km 30-35 sec lagta hein.

 

Program:

C program yha se copy nhi hoga isliye mene ek download file link nichhe diya hua h jo ek new window m open hoga tb aap vha se program copy kr sakte hein.

 

#include <reg51.h>

sbit object_detect=P0^0;
sbit led=P1^0;
void delay(unsigned int val);

void main(void)
{
P1=0;
delay(3000);
while(1)
{
if(object_detect==1)
led = 0;
else
led = 1;
}
}
void delay(unsigned int val)
{
unsigned int i,j;
for(i=0;i<=val;i++)
for(j=0;j<112;j++);
}

 

Download C Program:  PIR.c

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