Introduction: UNIQUE SECRET BOOK
I read MANY inscrutables & posts and saw that no one had created one like the one I made .
You must have seen many books which have a secret compartment in it.BUT it is DIFFERENT.
You see this approach allows reader to read whole book keeping the secret compartment out of sight. Thus is a TRULY secret book.
Epilog contest:
If I won the Zing laser I would put it to good use!
I will make small mechanical objects for my projects.
The laser cutter would be super useful for making custom parts.
Step 1: THING YOU NEED
Arduino nano (preferable) OR any other
servo moter
keypad
jumper wires
cardboard for making compartment
and MOST IMPORTANT A "BOOK"
Step 2: Get a Book!
First select a book that no-one in their right mind would ever want to read.
You will need a good thick book. Hard back is best but a paperback will also work.
if you are using paper back,then first apply card board on it and then start other steps
Step 3: Starting With Compartment
firstly ..
Dimensions of compartment will depend on size of your book spine.
Design of the compartment is shown in image.
In this compartment ,one place is for arduino and servo moter and other for keeping your things.
Step 4: ARduino Coding
Arduino code is very much easy.
For this you need
arduino software
libraries : Password click here,
keypad here
Code:
#include <Password.h> #include <Keypad.h>
#include <Servo.h>
Servo myservo; //declares servo
Password password = Password( "14471" ); //password to unlock box, can be changed
const byte ROWS = 4; // Four rows
const byte COLS = 4; // columns
// Define the Keymap
char keys[ROWS][COLS] = {{'1','2','3','A'}, {'4','5','6','B'},{'7','8','9','C'}, {'*','0','#','D'}};
// Connect keypad ROW0, ROW1, ROW2 and ROW3 to these Arduino pins.
byte rowPins[ROWS] = { 5, 4, 3, 2 };// Connect keypad COL0, COL1 and COL2 to these Arduino pins.
byte colPins[COLS] = { 8, 7, 6, 9 };// 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);
myservo.attach(12); //servo on digital pin 9 //servo
keypad.addEventListener(keypadEvent); //add an event listener for this keypad
}<br>
void loop(){ keypad.getKey();
} //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 'A': checkPassword();delay(1); break;
case 'B': password.reset(); delay(1); break;
default: password.append(eKey); delay(1);
}
}
}
void checkPassword(){
if (password.evaluate()){ //if password is right open box
Serial.println("Accepted");
Serial.write(9);delay(10);
//Add code to run if it works
myservo.write(135);
delay(500); //wait 5 seconds
}
else{
Serial.println("Denied"); //if passwords wrong keep box locked
Serial.write(254);
delay(10);
//add code to run if it did not work
myservo.write(45);
delay(500); //wait 5 seconds
}
}
Attachments
Step 5: Connection
keypad to arduino connection (refer image)
8 to Digital 5 of Arduino
7 to Digital 4
6 to Digital 3
5 to Digital 2
4 to Digital 8
3 to Digital 7
2 to Digital 6
1 to Digital 9
Servo Moter to Arduino connection (refer image)
Orange to Digital 12
Brown to GND
Red to 5V
Step 6: Set Up Locking Mechanism Inside Compartment
To lock the Compartment, I am using a three eye screws and a locking pin. Two eye screws are mounted to the inside of the front panel of the box. A third eye screw is mounted to the inside of the lid of the box. When the lid is closed, the holes of the eye screws line up. The box is locked by inserting a pin through all three holes while the box is closed. The box is unlocked by removing the pin.
The pin is a simple piece of steel wire (straightened paperclip). It is moved by the servo. The wire is attached to the servo at one of the holes on the servo horn (actuator arm).
Step 7: Mount the Rest of the Components to Over the Book
Attach compartment to book spine.
stick keypad on cover of book.
Step 8: Covering the Book With New Cover
to hide the compartment and keypad you should cover it with paper or something which can give the book a vintage look.
After covering the book , name the book such that some letter of name are on the top of your password (number).
letters should also cover keypad's button ( A & B)
e.g.
In my case
password is 14471
then
number 1,4,7 of the keypad are under letter A, 0, 1 initiated on the book
So when i will press A001A , my door of the safe will get unlocked
Make a cut on the spine of the book where the door of the compartment is. So it can get open.
note: you should cut this very neatly.
Step 9: YOUR Secret Book Is Ready
