Difference between revisions of "Hall Effect Sensor"

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[[File:Hall sensor sch.jpg | 400px]]
 
[[File:Hall sensor sch.jpg | 400px]]
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'''Hardware:'''
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[[File:Hall sensor 1.jpg | 400px]]
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Components needed for the project
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[[File:Hall sensor 2.jpg | 400px]]
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Wiring Picture
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[[File:Hall sensor 3.jpg | 400px]]
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When there is no magnet close to the Hall sensor, the LED-L will remain off.
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[[File:Hall sensor 4.jpg | 400px]]
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When magnet is close to the Hall sensor, the LED-L will turn off.
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'''Code:'''
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<syntaxhighlight lang="c">
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int ledPin = 13;   
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int out = 12;   
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void setup()
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{
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  pinMode(ledPin, OUTPUT);
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  pinMode(out, INPUT);   
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}
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void loop()
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{
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    if ( digitalRead(out) )   
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{
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          digitalWrite(ledPin,LOW );
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}
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  else
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{                             
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        digitalWrite(ledPin,HIGH);
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}
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}
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</syntaxhighlight>
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==Resources==
 
==Resources==
 
*[https://s3.amazonaws.com/linksprite/Arduino_kits/SensorsPack/0004824_US5881_rev008.pdf Datasheet]
 
*[https://s3.amazonaws.com/linksprite/Arduino_kits/SensorsPack/0004824_US5881_rev008.pdf Datasheet]

Revision as of 07:42, 30 November 2012

Hall effect sensors detect whether a magnet is near. Useful for non-contact/waterproof type switches, position sensors, rotary/shaft encoders.

Runs at 3.5V up to 24V. To use connect power to pin 1 (all the way to the left), ground to pin 2 (middle) and then a 10K pull up resistor from pin 3 to power. Then listen on pin 3, when the south pole of a magnet is near the front of the sensor, pin 3 will go down to 0V. Otherwise it will stay at whatever the pullup resistor is connected to. Nothing occurs if a magnet's north pole is nearby (unipolar).

Example Project

The purpose of this project is to demo the usage of Hall Sensor. When the magnet is close to Hall sensor, the LED-L on Arduino will turn on, and the LED will turn on when the magnet is removed.

List of Components:

Item Quantity
Arduino Duemilanove or Uno 1
Hall Sensor 1
USB Cable with type A Interface 1
Mini Breadboard 1
Jumper Wire with Male Header 3
Resister with value 10K ohm 1
PC 1

Schematics:

Hall sensor sch.jpg


Hardware:

Hall sensor 1.jpg

Components needed for the project


Hall sensor 2.jpg

Wiring Picture


Hall sensor 3.jpg

When there is no magnet close to the Hall sensor, the LED-L will remain off.


Hall sensor 4.jpg

When magnet is close to the Hall sensor, the LED-L will turn off.


Code:

<syntaxhighlight lang="c">

int ledPin = 13; int out = 12;

void setup() {

  pinMode(ledPin, OUTPUT); 
  pinMode(out, INPUT);    

}

void loop() {

   if ( digitalRead(out) )    

{

          digitalWrite(ledPin,LOW ); 

}

  else

{

        digitalWrite(ledPin,HIGH); 

} }

</syntaxhighlight>


Resources