Descrição

MINI reed switch moduleA reed module is a magnetic sensor that is normally open and get closed when exposed to a magnetic field.In our example turn off the buildin LED on pin 13 if the sensor is closed. For this you need to keep a magnet near the sensor.The module includes a 10 K Ohm resistor, so no additional parts needed.SchematicArduino GND –> Module pin -Arduino +5V –> Module PLUS (middle pin)Arduino Digital pin 3 –> Module S————————————————————–Example Code————————————————————-//// Example code for sensor KY021// More info on ,http://tkkrlab.nl/wiki/Arduino_KY-021_Mini_magnetic_reed_modules//int Led = 13 ;// define LED Interfaceint buttonpin = 3; // define the Reed sensor interfacesint val ;// define numeric variables valvoid setup (){ pinMode (Led, OUTPUT) ;// define LED as output interface pinMode (buttonpin, INPUT) ;// output interface as defined Reed sensor}void loop (){ val = digitalRead (buttonpin) ;// digital interface will be assigned a value of 3 to read val if (val == HIGH) // When the Reed sensor detects a signal, LED flashes { digitalWrite (Led, HIGH); } else { digitalWrite (Led, LOW); }}