Here a components test for your Danger Shield.
I hope you could enjoy this 
/*
29/12/2010
project: Sketch for Danger Shield Check
by: dejan21
note: no libraries need
*/
// VAR
int val = 0;
int state = 0;
int state3 = 0;
int x = 0;
int i = 0;
int statenew = 0;
int stateold = 0;
const byte numeri[10] = {
B00111111, //0
B00000110, //1
B01011011, //2
B01001111, //3
B01100110, //4
B01101101, //5
B01111101, //6
B00000111, //7
B01111111, //8
B01101111 //9
};
//PIN DIGITALI BOTTONI
#define BUTTON1_PIN 2
#define BUTTON2_PIN 7
#define BUTTON3_PIN 4
//SLIDERS ANALOGICHE
#define SLIDER1_PIN 0
#define SLIDER2_PIN 1
#define SLIDER3_PIN 2
//SENSOR
#define LIGHT_SENSOR_PIN 3
#define TEMP_SENSOR_PIN 4
#define KNOCK_SENSOR_PIN 5
//LED & BUZZER
#define LED1_PIN 6
#define LED2_PIN 5
#define BUZZER_PIN 3
#define SLIDER1_LED_PIN 11
#define SLIDER2_LED_PIN 10
#define SLIDER3_LED_PIN 9
//PIN
#define LATCH_PIN 8
#define CLOCK_PIN 12
#define DATA_PIN 13
//NUMBER TEST
#define TESTSLIDER 1
#define TESTBUZZER 2
#define TESTKNOCK 3
#define TESTSENSORETEMPERATURA 4
#define TESTSENSORELUMINOSITA 5
#define TESTBOTTONE3 6
#define TESTDISPLAY 7
void setup()
{
Serial.begin(9600);
digitalRead(BUTTON1_PIN);
digitalRead(BUTTON3_PIN);
digitalRead(BUTTON2_PIN);
digitalWrite(LED1_PIN,HIGH);
digitalWrite(LED2_PIN,HIGH);
analogRead(SLIDER1_PIN);
analogRead(SLIDER2_PIN);
analogRead(SLIDER3_PIN);
analogWrite(SLIDER1_LED_PIN,HIGH);
analogWrite(SLIDER2_LED_PIN,HIGH);
analogWrite(SLIDER3_LED_PIN,HIGH);
pinMode(BUZZER_PIN, OUTPUT);
pinMode(LED1_PIN, OUTPUT);
pinMode(LED2_PIN, OUTPUT);
pinMode(LATCH_PIN, OUTPUT);
pinMode(CLOCK_PIN, OUTPUT);
pinMode(DATA_PIN,OUTPUT);
Serial.println("DANGER SHIELD CHECK COMPONENTS");
Serial.println("PUSH BUTTON1 TO SELECT THE TEST");
Serial.println("PUSH BUTTON2 TO START THE TEST SELECTED");
Serial.println("PUSH RESET BUTTON TO RESTART THE CHECK");
Serial.println("TEST 1 = SLIDERS ");
Serial.println("TEST 2 = BUZZER ");
Serial.println("TEST 3 = KNOCK SENSOR ");
Serial.println("TEST 4 = TEMP SENSOR ");
Serial.println("TEST 5 = LIGHT SENSOR ");
Serial.println("TEST 6 = BUTTON3 ");
Serial.println("TEST 7 = DISPLAY 7 SEGMENTS ");
Serial.println("If the test is ok you'll read TEST = OK");
Serial.println("");
Serial.println("loading test LED1 e LED2 ...");
delay(2000);
Serial.println("please wait...");
delay(3000);
Serial.println("Now leds blink");
delay(1000);
for (int contatore = 0; contatore < 15; contatore++)
{
digitalWrite(LED1_PIN,HIGH);
delay(100);
digitalWrite(LED1_PIN,LOW);
delay(100);
digitalWrite(LED2_PIN,HIGH);
delay(100);
digitalWrite(LED2_PIN,LOW);
delay(100);
}
Serial.println("If the leds blink the DANGER SHIELD is ready for the CHECK COMPONENTS");
Serial.println("Push BUTTON1 to start selection TEST");
}
void loop()
{
int stato1 = digitalRead(BUTTON1_PIN);
if(stato1==1)
{
delay(1000);
statenew ++;
if (statenew > stateold)
{
byte j = numeri[statenew];
digitalWrite(LATCH_PIN, LOW);
shiftOut(DATA_PIN, CLOCK_PIN, MSBFIRST, j);
digitalWrite(LATCH_PIN, HIGH);
Serial.println("");
Serial.print("TEST ");
Serial.print(statenew);
Serial.print(": Push BUTTON2 to start this TEST");
stateold = statenew;
if (statenew == 7)
{
statenew=0;
stateold=0;
}
}
}
int stato2 = digitalRead(BUTTON2_PIN);
if(stato2==1)
{
delay(500);
if (statenew == 0)
{
statenew = 7;
}
Serial.println("");
Serial.print("TEST ");
Serial.println(statenew);
Serial.println("please wait...");
byte j = numeri[0];
digitalWrite(LATCH_PIN, LOW);
shiftOut(DATA_PIN, CLOCK_PIN, MSBFIRST, j);
digitalWrite(LATCH_PIN, HIGH);
delay(2000);
//TEST SLIDERS
if(statenew == TESTSLIDER)
{
delay (1000);
Serial.println("TEST SLIDERS: ");
val = analogRead(SLIDER1_LED_PIN);
Serial.println("TEST = OK if you can see analogic values & leds blink");
Serial.print("slider1 = ");
Serial.println(val);
val = analogRead(SLIDER2_LED_PIN);
Serial.print("slider2 = ");
Serial.println(val);
val = analogRead(SLIDER3_LED_PIN);
Serial.print("slider3 = ");
Serial.println(val);
for (int contatore = 0; contatore < 15; contatore++)
{
analogWrite(SLIDER1_LED_PIN,LOW);
delay (100);
analogWrite(SLIDER2_LED_PIN,LOW);
delay(100);
analogWrite(SLIDER3_LED_PIN,LOW);
delay(100);
analogWrite(SLIDER1_LED_PIN,HIGH);
delay (100);
analogWrite(SLIDER2_LED_PIN,HIGH);
delay(100);
analogWrite(SLIDER3_LED_PIN,HIGH);
delay(100);
}
}
//TEST BUZZER
if(statenew == TESTBUZZER)
{
Serial.println("TEST BUZZER");
for(int x = 0; x < 5; x++)
{
digitalWrite(BUZZER_PIN, HIGH);
delay(100);
digitalWrite(BUZZER_PIN, LOW);
delay(100);
}
Serial.println("TEST = OK if buzzer produces intermittence noise");
}
//TEST KNOCK
if(statenew == TESTKNOCK)
{
Serial.println("TEST KNOCK");
val = analogRead(KNOCK_SENSOR_PIN);
if(val > 10)
delay(1550);
{
Serial.println("TEST = OK if LED1 blink");
digitalWrite(LED2_PIN,LOW);
for (int contatore = 0; contatore < 30; contatore++)
{
digitalWrite(LED1_PIN,HIGH);
delay (100);
digitalWrite(LED1_PIN,LOW);
delay(100);
}
}
}
//TEST TEMP SENSOR
if(statenew == TESTSENSORETEMPERATURA)
{
Serial.println("TEST TEMP SENSOR");
val = analogRead(TEMP_SENSOR_PIN);
Serial.print("Temp value: ");
Serial.println(val);
Serial.println("TEST = OK if you have a temp value");
}
//TEST LIGHT SENSOR
if(statenew == TESTSENSORELUMINOSITA)
{
Serial.println("TEST LIGHT SENSOR");
val = analogRead(LIGHT_SENSOR_PIN);
Serial.print("Light value: ");
Serial.println(val);
Serial.println("TEST = OK if you have a light value'");
}
//TEST BUTTON3
if(statenew == TESTBOTTONE3)
{
Serial.println("TEST BUTTON 3");
Serial.println("Push & Hold BUTTON3 within 5 seconds");
delay (5000);
state3 = digitalRead(BUTTON3_PIN);
if (state3 == 1)
{
Serial.println("TEST = OK if LED1 and LED2 blink");
for (int contatore2 = 0; contatore2 < 10; contatore2++)
{
digitalWrite(LED1_PIN,HIGH);
delay (100);
digitalWrite(LED2_PIN,HIGH);
delay(100);
digitalWrite(LED1_PIN,LOW);
delay (100);
digitalWrite(LED2_PIN,LOW);
delay(100);
}
}
else
{
Serial.println("Button 3 not checked or pushed");
}
}
//TEST DISPLAY 7 SEGMENTs
if(statenew == TESTDISPLAY)
{
i = 0;
Serial.println("TEST DISPLAY");
for (int i=10; i>-1; i--)
{
byte j = numeri[i];
digitalWrite(LATCH_PIN, LOW);
shiftOut(DATA_PIN, CLOCK_PIN, MSBFIRST, j);
digitalWrite(LATCH_PIN, HIGH);
delay(500);
}
Serial.println("TEST = OK if countdown started");
}
statenew=0;
stateold=0;
}
}