The Reed devices are electronic or electromechanical components that work using the technology of the reed contacts, realized for the first time by the Bell.
The Reed contact switch is a lamina (normally open) which closes in the presence of a magnetic field.
The reed contacts have found use in the production of various types of sensors. There are two modes of use of these contacts:
simple pure contacts, for the detection of a magnetic field; complex equipment, in which the reed contact is used as the transduction element. In this guide I'll show you how to use this switch to turn on an LED.
Step 1: The Circuit
We will need:
- Arduino Uno
- Breadboard (base)
- Wires for links
- Reed Switch
- A resistor 10KOhm
- A resistor 220ohm
- An LED
Once procured components assemble the circuit:
Step 2: The Sketch
Now we can load the sketch on our board.
const int pinSwitch = 12; //Pin Reed
const int pinLed = 9; //Pin LED
int StatoSwitch = 0;
pinMode(pinLed, OUTPUT); //Imposto i PIN
StatoSwitch = digitalRead(pinSwitch); //Leggo il valore del Reed
if (StatoSwitch == HIGH)