Keyes KY 024 Hall Sensor
The KY024 Hall Sensor is a sensor that measures magnetism. Typically KY-024 Hall Sensor is used to calculate (and therefore adjust or stabilize) the speed of a mechanism in rotation or as a proximity switch. There are also sensors switch type, which are limited to only intervene on reaching a threshold of intensity (see KY003) and therefore provide only one output ON / OFF state. In the case of KY024 point intensity 0 should correspond approximately to + 2.5V with an excursion to the 0V and + 5V in step 1024 if fed precisely to 5V. Despite this sensor has a linear response, however, it is not suitable to be used as a measurement of intensity of a magnetic field due to low precision.
- Operating Voltage : 5 VDC
- Temperature range : -40°C to 85 °C
- Current input/output max 8/20mA
- Response time: 3uS (very fast)
- Support digital and analog signal with sensitivity threshold adjustment
- 4 pins pinout with 2.54mm pitch easy to connecto with the MCU
- Input voltage: 3.3-5V, Output Voltage: 5V
- AO Analog Output
- G Ground
- + Supply (3.3V - 5V)
- DO Digital Output
// Sensor Keyes KY024 (chip ss49E)
// Type: Analog
// External Libraries: no
// Magnetic field sensor analog HALL effect
// -------------------------------------------------------------------------
// Supply 5V
// Connections Arduino
// V = 5V
// G = mass
// S = A0
const int SIGPIN = A0;
const float GAUSS_PER_STEP = 2,713;
float rawValue = 0.0;
float value = 0.0;
zeroLevel float = 537.0;
void setup ()
{
Serial.begin (9600);
pinMode (SIGPIN, INPUT);
Serial.println ("KY024 - Linear Hall Sensor - Test program.");
}
void loop ()
{
rawValue = analogRead (SIGPIN) - zeroLevel;
Serial.print ("Read Raw");
Serial.println (rawValue);
// Reading positive relative to the South Pole, the North Pole negative
value = rawValue * GAUSS_PER_STEP;
// Serial.print ("Reading Calibrated in Gauss:");
// Serial.println (value);
delay (1000);
}