How do I use this hall sensor? 44E 402

Other Hardware Sensors
1

Hello.
I have bought a hall sensor module with 3 pins and I have no data sheet. But what I have found from google is that pin 1 = power, 2 = ground, and 3 = output.
I post an image below how I have connected it so far.
The problem is that the sensor seems to give no sign of working when a magnet is nearby. By using analogRead and the seriell monitor i can see the sensors value is between 892-893 (depending on resistor). What am I not understanding?

Thanks in advance.

2

Hi,
What is the actual sensor, that would be helpful. It may not be analogue? but digital to indicate a magnetic field or NOT! (a switch or detector) The common one's are Allego. I used I think the A311 this gives a mid-point output for no magnet a high output for South pole and low for North (Yes analogue).
Can we see your code?

A better image close up, where it matters would be useful. What's on the module? there can't be a lot, is the pull-up resistor already on there?

Hope it helps, regards

Mel.

3

Can you read a part ID on the sensor itself? This would help to verify the module pins etc.

4

Cactusface:
Hi,
What is the actual sensor, that would be helpful. It may not be analogue? but digital to indicate a magnetic field or NOT! (a switch or detector) The common one's are Allego. I used I think the A311 this gives a mid-point output for no magnet a high output for South pole and low for North (Yes analogue).
Can we see your code?

A better image close up, where it matters would be useful. What's on the module? there can't be a lot, is the pull-up resistor already on there?

Hope it helps, regards

Mel.

DrDiettrich:
Can you read a part ID on the sensor itself? This would help to verify the module pins etc.

Okay so here are som more photos and code, hope this helps:



The sensor it self says:
44E
402

And here is my code:

int const sensorPin = A5;

void setup() {
  pinMode(sensorPin,INPUT);
  Serial.begin(9600);
}

void loop() {
  int sensorState = analogRead(sensorPin);
  
  Serial.print("sensorState: ");
  Serial.println(sensorState);
}

I have also tried it as digital output with this code:

int const sensorPin = 3;
int const led = 13;

void setup() {
  pinMode(sensorPin,INPUT);
  pinMode(led,OUTPUT);
  }

void loop() {
  int sensorState = digitalRead(sensorPin);
  if(sensorState == HIGH){
    digitalWrite(led,HIGH);
  }
  else{digitalWrite(led,LOW);
  }
}

But nothing happens here either.

5

Hi,
A quick google found this image and this post:

http://forum.arduino.cc/index.php?topic=261119.0

I can't see that taking 24 Volts, it's got to be 5V?? It seems that this may be one that only detects a magnetic field and not the polarity of it.

Regards

Mel.

images.jpg

6

If the component pins are bent down till they touch the PCB then this may be shorting out centre and left pins.

7

Cactusface:
Hi,
A quick google found this image and this post:

Magnetic Hall Sensor 44E - Wiring Diagram - Sensors - Arduino Forum

I can't see that taking 24 Volts, it's got to be 5V?? It seems that this may be one that only detects a magnetic field and not the polarity of it.

Regards

Mel.

Yes that's the one! 24V sounds a bit to much yes, anyway i only give it 5V. I have tried to switch + and GND but it still gives the same results (I have also tried every possible direction with the magnet). Is it the 10K resistor that I am missing?
Thank you

Riva:
If the component pins are bent down till they touch the PCB then this may be shorting out centre and left pins.

It's the photo, it's not touching :confused:

8

Draw some lines in paint (what I can see by looking close):

9

I just want to tell it's fully working now. Thank you guys.