Motor Speed Controller

Motor: 6V Micro Gear Motor

IRF520 MOSFET Driver Module for Arduino

 // Pin Definitions- Arduino Nano

const int potPin = A0; // Analog input connected to potentiometer wiper

const int motorPin = 3; // PWM output connected to motor driver / MOSFET (D3 supports PWM)

void setup() {

pinMode(motorPin, OUTPUT);

// Analog pins configured as inputs by default

}

void loop() {

// Read the potentiometer value (0 - 1023)

int potValue = analogRead(potPin);

// Map 10-bit analog read (0-1023) to 8-bit PWM duty cycle (0-255)

int pwmValue = map(potValue, 0, 1023, 0, 255);

// Output PWM signal to Pin D3

analogWrite(motorPin, pwmValue);

// Small delay for ADC stability

delay(10);

}

Motor Controller Connections:

Motor to V+,V-

5V to Vin, GND

D3 to SIG, 5V to Vcc, GND-->DND

Motor: