/*
 Voltaat learn (http://learn.voltaat.com)
 Link for full tutorial:

 Tutorial: Control a motor using NPN transistor

 The function of this sketch is to control a DC motor using the Arduino with the help of the NPN transistor.
 The motor will be switched on for one second, then turned off, and the process will be repeated

 Connections from the NPN transistor:
 • NPN emitter pin → Arduino GND pin
 • NPN base pin (middle pin) → Arduino pin 3
 • NPN collector pin → Motor first wire

 Connections from the motor:
 • Motor first wire → NPN collector pin
 • Motor second wire → Arduino VCC pin (5V)

*/
//Commands inside void setup run once
void setup() {
 //Pin 3 is defined as an output
 pinMode(3, OUTPUT);
}

//Commands inside void loop run forever
void loop() {
 //Turn the motor on
 digitalWrite(3, HIGH);
 //wait for a second
 delay(1000);
 //Turn the motor off
 digitalWrite(3, LOW);
 //wait for a second
 delay(1000);
}