Anxious Doll

Description:
I made a cardboard figure with a circular cutout in its stomach that spins (using a DC motor) when a hand is close to it (using a photocell). One of the difficulties that arose was finding the lowest possible range of speeds for the motor.
Materials:
1- Breadboard
1- Arduino Uno
1 1K Ohm resistor
1 10K Ohm Resistor
1 DC motor
1 2 x 1.5V AA battery pack
1 Zener Diode
1 Transistor
1 Photocell
Cardboard
Code:

/*

 * Anxious doll

 * One photocell fades the motor.

 */

int pcPin = A0;

int motorPin = 9;

int val = 0;

void setup() {

  pinMode(pcPin, INPUT);

  pinMode(motorPin, OUTPUT);

  Serial.begin(9600);

}

void loop() {

  val = 120 - analogRead(pcPin)/4; 

  Serial.println(val);

  if(val > 0) {

    if (val > 10) {

      analogWrite(motorPin, 40);

    } else {

      analogWrite(motorPin, val + 30);

    }

  }

}

 
Images:
http://i40.tinypic.com/5cg9qg.jpg