Contactless Car Unlocking System

The Contactless Car Unlocking System allows a user to unlock a car with a specific NFC card instead of using a physical key. NFC-compatible bank cards, student ID cards, etc. may be scanned at the sensor location to remotely press the unlock button inside of the car using a 5V relay. The system is powered by the car’s battery which is stepped down to a low enough voltage with a voltage regulator. All components are interfaced through a custom printed circuit board (PCB) and housed in a 3D printed enclosure.Components:MBED LPC1768uLCD-144-G2 128 by 128 Smart Color LCD5V relayPN532 NFC readerCustom PCB3D printed housingA custom 4-layer PCB includes power management, the microcontroller, and peripherals.4-layer PCBLTM8053 Switching Regulator (integrated inductor, 6A max output current)Dual LP38692 LDO Voltage Regulator (1A output, separate for servo and microcontroller power)The program runs in three separate threads to manage the NFC scanner and uLCD at the same time.Main Thread - Initia