Keypad Lock (reinventing the wheel)

Forum 2005-2010 (read only) General Exhibition
2

I actually just finished reinventing this particular wheel today!

My sketch didn't need password stuff, though. I press "*" then type a 3 to 4 digit time then press "#" and it sets the clock to that time pressing the buttons at 30Hz. VERY FAST.

My code for scanning the keypad(in case you were wondering).

void getKey() {
  
  for(int col = 0; col < 3; col++) {
    
    digitalWrite(colPin[col], LOW);
    
    for(int row = 0; row < 4; row++) {
      if(!digitalRead(rowPin[row])) {
        lastPressed = key[row][col];
        pressCount++;                       //for telling if a new key was pressed
        delay(debounceTime);
      }
    }
    
    digitalWrite(colPin[col], HIGH);
    
  }
}

Pretty straight forward. There is more to it obviously. For instance the code that makes it so it will only take the time input when the "*" has been pressed first and so on..

Oh.. I can also set my alarm from my cell phone.