Overview This project implements a security access control system that combines RFID card authentication and a keypad password for door access. The system utilizes an Arduino, RFID scanner, keypad, ...

So we won’t use the last pin of keypad which is for fourth column. You can also use 4X3 keypad instead of 4X4 keypad. Next connect the Led's, servo and buzzer with the Arduino as shown in the below ...

Learn to build an RFID based attendance system using Arduino with step-by-step instructions, circuit diagrams, and complete code. This $35 DIY project replaces expensive commercial systems with ...

Circuit Diagram to Build a Smart Toll System Using Arduino: Circuit Explanation 1. RFID Reader Connections: The RFID reader communicates with the Arduino via SPI protocol. The following connections ...

In an era where homeowners frequently leave for work or education, robust security for residences is imperative. Traditional security measures, including window and door locks, present challenges such ...