Briefcase with riddles to use in escape room amusement

According to the plot of the game, the briefcase is part of the puzzle and must be used in a chain of tasks to open the exit door.

The briefcase can be connected to a stationary connection console from which the door lock is unlocked.

All actions are accompanied by messages on numerical display, character LCD screen and sound signals from a buzzer.

The control elements inside the briefcase are:

• Card reader for card reading
• Standard full-size computer keyboard for entering passwords and numeric codes
• 8-digit display for displaying digital codes.
• 32-character LCD screen for displaying password and explanations
• Buzzer for sound signals
• Electrical connector for connecting the diplomat to the remote control

On the stationary console there are:

• Two buttons for opening doors, covered with a transparent cover
• Electric lock that locks the transparent cover
• Electric lock that blocks the opening of the exit door
• Signal LED

Operation logic

The system includes several “riddles” that must be solved sequentially:

1. The briefcase must be found in a secret place inside the room
2. The unlock card must be found in another secret location
3. The suitcase must be connected to the stationary console with a cable, after which a sound signal will sound and the Insert card request will appear on the character screen.
4. The player inserts a card

   • Card inserted – The character screen displays password: and the cursor flashes. The numerical display displays a random set of numbers (changing every 0.3-0.5 seconds). The digital block does not respond to pressing;
   • Card removed – The symbol screen displays Insert card;

5. The player begins to enter the code from the keyboard

   • Entering a symbol or number – displayed on the screen;
   • del, backspace – deleting the last character;
   • esc – deletes all entered characters;
   • enter – enter a password;
   • The rest of the buttons - nothing happens and a short buzzer;

6. The player entered the password and pressed enter

   • Wrong password – long buzzer, wrong password flashes on the screen three times with a pause of 0.5 seconds. Then everything goes back to the beginning of entering the password;
   • The password is correct – correct password is displayed on the character screen for 10 seconds. The change of numbers on the numerical display stops - a certain sequence of 8 digits is displayed. The character screen displays code decrypted The LED next to the number pad begins to blink. The alphabetic keyboard stops responding to keystrokes;

7. The player starts typing the numbers on the number pad

   • Each press is accompanied by a flash on the numeric display and a short buzzer tone.

8. All 8 digits entered and presseed # (as it will be signed as ok on the numeric keypad)

   • The code is incorrect – the buzzer is long, the numbers on the numerical scoreboard flash twice and light up again;
   • The code is correct – the numbers on the numerical board are extinguished. The correct code is displayed on the symbol screen. A signal is given to unlock the magnetic lock of the button cover on the main stationary console;

9. The electric lock, which locks the transparent lid, is unlocked and two buttons become available

   • The player presses one of the buttons – nothing happens, a short buzzer;
   • The player presses two buttons at the same time – the lamp between the buttons lights up, the long buzzer comes on, the electric lock of the exit door is unlocked;

System parameters:

• Main controller – Arduino Uno
• Processor – 16 MGh, ATmega328P
• Controller memory – 32 KB Flash + 2 kB SRAM + 1kB EEPROM
• LCD screen – LCD 1602
• Screen size – 64.5x13.8 mm
• Character size – 4.35x2.95 mm
• Pixel size – 0.5x0.5 mm
• Seven-segment display – 8-digit
• Dispay size – 100x19mm
• Digit size – 8x14.2mm
• Power supply – 12V 2A
• Briefcase dimensions – 440x320x120 mm

Components

• Controller Arduino UNO
• Full-size computer keyboard with PS2 connector
• Seven-segment numerical display (8-digit)
• 32-character LCD screen LCD1602
• 5V buzzer
• Card reader
• Standard buttons – 2pcs
• Signal led
• Electric lock – 2pcs

Wiring diagram

Further development of the system

• Improvements to puzzle plots;

• Adding internal power supply and wireless connection;

• Adding speakers and audio feedback in the form of recorded audio messages;

• Adding a full TFT display to display graphics;