Control electromagnets over Arduino, making use of RFP30N06LE N-Channel MOSFET

electromagnet_mosfet_arduino.ino

/* 
 
  Control an electromagnet over Arduino, using an RFP30N06LE N-Channel MOSFET

  Developed for Arduino Uno and the MOSFET Power Control Kit, COM-12959

  Created 2018
  by Robin van Emden

*/

int led = 13;
int mosfet_control = 10;
int tone_control = 8;
int key_press = 0;

void setup()
{
  Serial.begin(9600);                                     // Turn the Serial Protocol ON
  pinMode(mosfet_control, OUTPUT);                        // Set control pins to be outputs
}

void loop()
{
  if (Serial.available() > 0)                             // Check if keyboard input
  {
    key_press = Serial.read();                            // Read input

    Serial.print("Key:\t");
    Serial.println(key_press);
    Serial.println("done");

    if (key_press == 49) {                                // if key press "1" ...
      digitalWrite(led, HIGH);                            // Turn LED on on Arduino
      for ( int x = 0; x < 10; x++ ) {                    // 10 pulses of 500 ms
        analogWrite(mosfet_control, 255);                 // Full power
        tone( tone_control, 1000, 500);                   // Beep for 500ms (while magnet on) 
        Serial.println("Magnets +++ on  +++");
        delay(500);
        analogWrite(mosfet_control, 0);                   // Power off
        Serial.println("Magnets --- off ---");
        delay(500);
      }
      Serial.println("### ready ###");
      digitalWrite(led, LOW);                             // Turn LED off on Arduino
    }
  }
}