i DID make a car sensor sheild, but its not for  sale cuz i dont have enough money to make more + im 11 >_>

try printing"   hello world"

maby you have to put 3 or 4 or 5 spaces before your print

and if that dont work, tell me what you mean by (overwriting its self)

My problem is that it seems to overwrite itself sometimes

try inserting lcd.clear();

in some cases that might help

Try This, I Think I Fixed It For You

Code:

#include <LCD4Bit.h>

LCD4Bit lcd = LCD4Bit(2);


int x = 0;
int i =0;
int button = 13;
char g[53]="";
char u[25]="";
char ut[25]="";
char l[25]="";
char lt[25]="";
char b[25]="                       ";
int scrolled=0;


void setup()
{
  lcd.init();
  Serial.begin(19200);
}

void loop()
{
lcd.clear();
  // Serial data waiting?
  if (Serial.available())
  {
    delay(100);
    
    // Read in the serial data to g
    while(Serial.available()>0)
    {
      g[x]=Serial.read();
      x++;
    }
    x=0;
    char ch = g[x];
    
    // Begin filling the upper temp, until the % character
    while (g[x] != '%')
    {
      ut[x-1]=g[x];
      x++;
    }
    
    // Was that actually wanted data?
    if (g[0] != '$')
    {
      // If not, clear the upper temp
      for(int i = 0; i < 25; i++)
      {
        ut[i]=' ';
      }
    }
    
    // Fill the rest to the lower temp until ^ character
    while(g[x+1] != '^')
    {
      x++;
      lt[i]=g[x];
      i++;
    }
    x=0;
    i=0;
    
    // Clear g
    for(int i = 0; i < 53; i++)
    {
      g[i]=' ';
    }
  
    // Upper temp not empty?
    if (ut[0] != ' ')
    {
      // Clear upper line
      lcd.cursorTo(1,0);
      delay(1);
      lcd.printIn(b);
      delay(10);
      // Print new data
      lcd.cursorTo(1,0);
      delay(1);
      lcd.printIn(ut);
      delay(10);
      // Save temp
      for(int i = 0; i < 25; i++)
      {
        u[i]=ut[i];
        ut[i]=' ';
      }
    }
    
    // Lower temp not empty?
    if (lt[0] != ' ')
    {
      // Clear lower line
      lcd.cursorTo(2,0);
      delay(1);
      lcd.printIn(b);
      delay(10);
      // Print new data
      lcd.cursorTo(2,0);
      delay(1);
      lcd.printIn(lt);
      delay(10);
      // Save temp
      for(int i = 0; i < 25; i++)
      {
        l[i]=lt[i];
        lt[i]=' ';
      }
    }
  }
  
  // Otherwise, check if we should be scrolling
  while(!(Serial.available() > 0))
  {
lcd.clear();
    delay(1500);
    // Scroll if the string is off the screen
    if((u[16] != ' ')||(u[17] != ' ')||(l[16] != ' ')||(l[17] != ' '))
    {
      lcd.leftScroll(10,750);
      scrolled=1;
    }
    // If scrolled, redraw the text
    if (scrolled == 1)
    {
      lcd.clear();
      lcd.cursorTo(1,0);
      lcd.printIn(u);
      delay(1);
      lcd.cursorTo(2,0);
      lcd.printIn(l);
      scrolled=0;
    }
  }
}
 

great, now nothing will show up >_>

i connected  my lcd 100% correct, it works but then all of a sudden it displayed: iuhhgfbbbssqaaqaqzzbd  o

the program is the lcd example hello, word

huh >

i am still kinda new to arduino, but i dont understand...

Code:

//z-parakeet inc.'s Fire Alarm Sketch
#include <LiquidCrystal.h>
// LiquidCrystal display with:
// rs on pin 12
// rw on pin 11
// enable on pin 10
// d4, d5, d6, d7 on pins 5, 4, 3, 2
LiquidCrystal lcd(12, 11, 10, 5, 4, 3, 2);

int ledPin = 13; // choose the pin for the LED
int buzzerPin = 9; //buzzer/alertor
int inputPin = 8;               // choose the input pin (for a pushbutton)
int val = 0;            // variable for reading the pin status
int truPin = 7;
int Alarms = 6;
int sil = 0;
void setup() {

 pinMode(buzzerPin, OUTPUT);   //declare BUZZER or allertor as a output!
 pinMode(ledPin, OUTPUT);      // declare LED as output
 pinMode(inputPin, INPUT);  // declare pushbutton as input
 pinMode(truPin, OUTPUT);
 pinMode(Alarms, OUTPUT);
     digitalWrite(buzzerPin, HIGH);
     digitalWrite(ledPin, HIGH);
     digitalWrite(truPin, HIGH);
       lcd.print("System Loading");
       lcd.print(".");
       delay(1000);
       lcd.print("..");
               delay(1000);
       lcd.print("...");
   delay(1000);
     lcd.print("System Stats: Standby");
   digitalWrite(buzzerPin, LOW);
   digitalWrite(ledPin, LOW);
   digitalWrite(truPin, LOW);
delay(2000);
}


 

void loop(){
 val = digitalRead(inputPin);  // read input value
 delay(0); //used to be a delay, but changed cuz of my update!
 if (val == HIGH) {      // check if the input is HIGH
 lcd.print("ALERT! TROUBLE OR FIRE");
   digitalWrite(truPin, HIGH);
   digitalWrite(ledPin, HIGH);  // turn LED ON
   delay(50);
   digitalWrite(ledPin, LOW);
   delay(50);
   digitalWrite(buzzerPin, HIGH);
     lcd.print("CHECK PULL STATIONS");
   delay(50);
   lcd.print("OR TEST SWITCH");
   digitalWrite(buzzerPin, LOW);
   delay(50);
   digitalWrite(Alarms, HIGH);
 } else {
     lcd.print("Standby.");
   digitalWrite(ledPin, LOW); // turn LED OFF
   digitalWrite(truPin, LOW);
   digitalWrite(Alarms, LOW);
  
 }
}

ive been posting that alot, but i need to know how to have it once the button is activated, it wont stop till i press the reset button on the arduino duemilinove.

follower, i was grounded, but here my school dont block this so horah


anyways thanks for the help every1 ;D ;D ;D ;D ;D ;D

this thread is about helping me, shoo

bump.

[setup]

 
//z-parakeet inc.'s Fire Alarm Sketch
#include <LiquidCrystal.h>
// LiquidCrystal display with:
// rs on pin 12
// rw on pin 11
// enable on pin 10
// d4, d5, d6, d7 on pins 5, 4, 3, 2
LiquidCrystal lcd(12, 11, 10, 5, 4, 3, 2);

int ledPin = 13; // choose the pin for the LED
int buzzerPin = 9; //buzzer/alertor
int inputPin = 8;               // choose the input pin (for a pushbutton)
int val = 0;            // variable for reading the pin status
int truPin = 7;
int Alarms = 6;
int sil = 0;
void setup() {

  pinMode(buzzerPin, OUTPUT);   //declare BUZZER or allertor as a output!
  pinMode(ledPin, OUTPUT);      // declare LED as output
  pinMode(inputPin, INPUT);  // declare pushbutton as input
  pinMode(truPin, OUTPUT);
  pinMode(Alarms, OUTPUT);
      digitalWrite(buzzerPin, HIGH);
      digitalWrite(ledPin, HIGH);
      digitalWrite(truPin, HIGH);
        lcd.print("System Loading");
        lcd.print(".");
        delay(1000);
        lcd.print("..");
                delay(1000);
        lcd.print("...");
    delay(1000);
      lcd.print("System Stats: Standby");
    digitalWrite(buzzerPin, LOW);
    digitalWrite(ledPin, LOW);
    digitalWrite(truPin, LOW);
delay(2000);
}


  

void loop(){
  val = digitalRead(inputPin);  // read input value
  delay(0); //used to be a delay, but changed cuz of my update!
  if (val == HIGH) {      // check if the input is HIGH
  lcd.print("ALERT! TROUBLE OR FIRE");
    digitalWrite(truPin, HIGH);
    digitalWrite(ledPin, HIGH);  // turn LED ON
    delay(50);
    digitalWrite(ledPin, LOW);
    delay(50);
    digitalWrite(buzzerPin, HIGH);
      lcd.print("CHECK PULL STATIONS");
    delay(50);
    lcd.print("OR TEST SWITCH");
    digitalWrite(buzzerPin, LOW);
    delay(50);
    digitalWrite(Alarms, HIGH);
  } else {
      lcd.print("Standby.");
    digitalWrite(ledPin, LOW); // turn LED OFF
    digitalWrite(truPin, LOW);
    digitalWrite(Alarms, LOW);
    
  }
}



 

Theres The Code.
The Problem Is That The Alarm Sounds When Button Is Not Pressed, When Pressed, Nothing Happens, alarm still sounds.

Circuit:


i got it when the alarm led wuz off, but the 6th led on the led chanel wuz the trouble/alarm led :-?

kk

i can means i can program...

http://www.kevboards.proboards.com






durrrr
i got my arduino on mar 18, im still new darnit