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Linear Hall magnetic module and a digital interface, built-in 13 LED build a simple circuit to produce a magnetic field warning lamp 13 comes with digital interfaces of the LED, the linear Hall sensor magnetometer access number 3 interface, when linear Hall magnetometer Sensor senses a key signal, LED lights, otherwise off.
int Led = 13 ; // define LED Interface
int buttonpin = 3; // define the linear Hall magnetic sensor interface
int val ; // define numeric variables val
void setup ()
{
pinMode (Led, OUTPUT) ; // define LED as output interface
pinMode (buttonpin, INPUT) ; // define linear Hall magnetic sensor output interface
}
void loop ()
{
val = digitalRead (buttonpin) ; // digital interface will be assigned a value of 3 to read val
if (val == HIGH) // When the linear Hall sensor detects a magnetic signal, LED flashes
{
digitalWrite (Led, HIGH);
}
else
{
digitalWrite (Led, LOW);
}
}