Securatai is a security system that can be installed in numerous locations, primarily houses, and schools, and which analyzes a card to determine whether a door unlocks or not. We can build this project together using the Rasberry Pi Pico, an LCD, a servo, and an MFRC522 module.
The Securatai system utilizes RFID to collect a card's data, which it then communicates to the Pico to determine if the card's ID is permitted access to the building. Since each card has a unique ID, the system can distinguish between various cards, which is useful if a card is only permitted to enter a certain area of the building while the others parts of the building prevent entry. A display will read "Access granted" and play a high-pitched sound 1 if a card has permission to enter. If not, a low-pitched sound 2 will be played along with the message "Access denied" on display. A servo will be used to rotate to open a latch lock to unlock. This mechanism works by attaching a metal wire to the servo and connecting it to the latch so that whenever the Servo rotates, the latch will move 3. After a few seconds, the servo is programmed to return the latch to the lock position to get you inside and lock the door for you.
Main parts and use:
- Raspberry Pi Pico W
Microcontroller board used to control electric modules/components.
- MFRC522 module
MFRC522 is a highly integrated read-and-write card chip that receives and sends information over to the Pico to decide what to execute.
- 2x Keycards
With each having its ID, the keycards are used to communicate with the MFRC522.
- Servo
Servos are devices that precisely rotate and push machine components.
- LCD
A liquid-crystal display is a flat-panel display that outputs text from the Pico.
- Passive buzzer
Used to create sounds based on frequency.
- Jumper cables
Used to connect 2 points in a circuit together.
- Electrical components (resistors, transistors, etc)
Used to limit electrical power or transfer data.