Pinwheel Fan

In this assignment, I decided to make a pinwheel fan using a DC motor. You can also use the potentiometer to control the speed of the fan. 
 
Components
1 DC Motor
1 Arduino Board
1 Bread Board
1 Potentiometer
1 Diode
1 Transistor
1 Battery
Connecting Wires
Code: I used the same code provided in the DC Motor assignment page.

/*
* one pot fades one motor
* modified version of AnalogInput
* by DojoDave <http://www.0j0.org>
* http://www.arduino.cc/en/Tutorial/AnalogInput
* Modified again by dave
*/

int potPin = 0; // select the input pin for the potentiometer
int motorPin = 9; // select the pin for the Motor
int val = 0; // variable to store the value coming from the sensor
void setup() {
Serial.begin(9600);
}
void loop() {
val = analogRead(potPin); // read the value from the sensor, between 0 - 1024
Serial.println(val);
analogWrite(motorPin, val/4); // analogWrite can be between 0-255
}