Hall Effect Sensor Module

The KY-024 Linear magnetic Hall sensor reacts in the presence of a magnetic field. It has a potentiometer to adjust the sensitivity of the sensor and it provides a digital output. The digital output acts as a switch that will turn on/off when a magnet is near.

Quick Spec

Operating Voltage: 2.7 ~ 6.5V
Sensitivity: 1.0 mV/G min., 1.4 mV/G typ., 1.75 mV/G max.
Current Input: 8mA
Output Current: 20mA
Response Time: 3uS
Board Dimensions: 15 x 36mm
Weight: 4g

Wiring Diagram

KY-024-004

KY-024	Arduino
A0	A0
G	GND
+	5V
D0	3

Sample Code



int led = 13 ; // LED on arduino
int digitalPin = 3; // linear Hall magnetic sensor digital interface
int analogPin = A0; // linear Hall magnetic sensor analog interface
int digitalVal ; // digital readings
int analogVal; // analog readings

void setup ()
{
 pinMode (led, OUTPUT); 
 pinMode (digitalPin, INPUT); 
 //pinMode(analogPin, INPUT); 
 Serial.begin(9600);
}

void loop ()
{
 // Read the digital interface
 digitalVal = digitalRead(digitalPin) ; 
 if (digitalVal == HIGH) // When magnetic field is present, Arduino LED is on
 {
  digitalWrite (led, HIGH);
 }
 else
 {
  digitalWrite (led, LOW);
 }
 
 // Read the analog interface
 analogVal = analogRead(analogPin);
 Serial.println(analogVal); // print analog value

 delay(100);
}