In this project I made an door lock (or box lock) that opens when you enter your password and press "*".

Step 1: Material Needed....

1. Arduino uno

2. Standard Servo

3. Red And Green LED

4. Male And Female Pin Headers

5. Door Lock

6. 4X4 Keypad

7.PCB

Step 2: Make PCB ....

Solder all the connection as shown above in the pics.

Or use frtizing file attached below

Step 3: Make Door Opening System....

Using Double tape Stick servo And Using A thick metal wire make a system that can open the lock when servo moves my pics above will help you..

Step 4: Put Every Thing Together

Put everything in order as shown in pics above

Step 5: Upload the Code on Arduino ..

Code Link :- https://drive.google.com/file/d/0B-ucVP7iDSacOTd3d...

Code :-

#include //http://playground.arduino.cc/uploads/Code/Password.zip //tells to use password library
#include //http://www.arduino.cc/playground/uploads/Code/Keypad.zip //tells to use keypad library #include //tells to use servo library

Servo myservo; //declares servo Password password = Password( "0000" ); //password to unlock, can be changed

const byte ROWS = 4; // Four rows const byte COLS = 4; // columns // Define the Keymap char keys[ROWS][COLS] = { {'1','2','3'}, {'4','5','6'}, {'7','8','9'}, {'*','0','#'} }; // Connect keypad ROW0, ROW1, ROW2 and ROW3 to these Arduino pins. byte rowPins[ROWS] = { 9, 8, 7, 6 };// Connect keypad COL0, COL1 and COL2 to these Arduino pins. byte colPins[COLS] = { 5, 4, 3 };

// Create the Keypad Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

void setup(){ Serial.begin(9600); Serial.write(254); Serial.write(0x01); delay(200); pinMode(11, OUTPUT); //green light pinMode(12, OUTPUT); //red light myservo.attach(13); //servo on digital pin 9 //servo keypad.addEventListener(keypadEvent); //add an event listener for this keypad }

void loop(){ keypad.getKey(); myservo.write(180); } //take care of some special events void keypadEvent(KeypadEvent eKey) { switch (keypad.getState()){ case PRESSED: Serial.print("Enter:"); Serial.println(eKey); delay(10); Serial.write(254); switch (eKey) { case '*': checkPassword(); delay(1); break; case '#': password.reset(); delay(1); break; default: password.append(eKey); delay(1); } } } void checkPassword(){ if (password.evaluate()) { //if password is right open Serial.println("Accepted"); Serial.write(254);delay(10); //Add code to run if it works myservo.write(0); //deg digitalWrite(11, HIGH);//turn on delay(10000); //wait 5 seconds digitalWrite(11, LOW);// turn off } else { Serial.println("Denied"); //if passwords wrong keep locked Serial.write(254);delay(10); //add code to run if it did not work myservo.write(180); digitalWrite(12, HIGH); //turn on delay(5000.); //wait 5 seconds digitalWrite(12, LOW);//turn off } }