I have a problem with my motion sensor

Using Arduino Programming Questions
1

Please, I have a problem, with my PIR motion detector.

I don't know why, but even when nothing is moving, it is still reading high, and it's frustrating

2

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3

Please post your sketch, using code tags when you do, and a schematic of your project. A photo of a hand drawn circuit is good enough

1 Like
4

Mine’s working fine, it must be your battery.

5

pir sketch
pir sketch712×508 11.5 KB

The above is the schematic. I did it exactly how it's built in real life here.

the below is the sketch

int ledpin = 6;
int motion = 9;

void setup() {

  Serial.begin(9600);
pinMode(6, OUTPUT);
pinMode(9, INPUT);

}

void loop() {
 int motion = digitalRead(9);
 Serial.print("motion value =");
 Serial.println(motion);
 delay(1000);

if(motion == 1){
  digitalWrite(6, HIGH);
} else{
  digitalWrite(6, LOW);
}
}
6

My cIrcuit is connected to my PC

7

Is the LED backward?

8

Maybe i made mistake with this sketch, but its not irl. the longer is connected to the arduino, and the shorter is connected to the resistor and ground

9

the real problem is with the pir sensor. it is reading high, even when no movement is made. it has been reading high since i uploaded the code.

my friend told me to reduce the sensitivity, i did, and its still the same thing

10

Adafruit has a page on testing a PIR that you might find useful.

11

And guys, the circuit is correct, and the code also. It is running perfectly in the simulation. The problem is with the motion sensor in real life. It is reading high, even when nothing is moving.

12

I don't get it. It's still not working.

13

guys please, help me

14

You performed all the steps that were laid out on the testing page? In under 12 minutes?

15

yes(sorry for late reply), i was doing a house chore
the led now is just blinking.

16

it's blinking and changing brightness, not on and off

17

Do you have a link to the exact PIR?

I bought a bunch that were very inexpensive and got what I paid for. Junk.

a7

18

i bought mine from the market physically. then, i think its my pir that is the problem

19

Post good pictures, top and bottom.

TIA

a7

20

my phone camera is really bad, it may not capture it well.