Controlling Large Loads with MOSFET Transistor

What is a MOSFET Transistor?

A MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) is a device widely used in modern electronics to control large loads efficiently.

How MOSFETs Work

MOSFETs are voltage-controlled devices with three terminals: Gate, Source, and Drain. They operate in Cut-off, Saturation, and Linear regions.

Wiring Diagram

To use a MOSFET with Arduino, follow the wiring diagram for N-Channel or P-Channel configurations depending on your circuit requirements.

Using Inductive Loads

When connecting inductive loads, always add a flyback diode to protect the MOSFET and Arduino from voltage spikes.

Example Code

// Example code for controlling a load with Arduino and MOSFET
const int loadPin = 9;

void setup() {
    pinMode(loadPin, OUTPUT);
}

void loop() {
    digitalWrite(loadPin, HIGH);
    delay(1000);
    digitalWrite(loadPin, LOW);
    delay(1000);
}