Drill It

Description
In this lab we experimented with DC Motors and transitors to create motion. We hooked up a battery pack, DC motor, transistor, some resistors, and a polarity regulating diode to the Arduino, and later I hooked up my force sensor to be able to control the rate of rotational motion by pushing my fingers together. I think attached a drill bit to my DC motor and essentially created my own drill using the code provided by the instructor. 
 
Components:
1- Arduino Uno Microcontroller
1- Breadboard
1- 220 Ω Resistors
1- 10k Resistor
1- Drill Bit
1- USB Cable
1- Force Sensor
1 - DC Motor
1 - Diode (1N4004)
1 - Transistor (TIP120)
2 - AA batteries
 
 
Code: 
 

/*

 * one pot fades one motor

 * modified version of AnalogInput

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

}