Security holds paramount importance in our everyday lives, and digital locks have emerged as crucial components of modern security systems. Various technologies exist to safeguard our premises, including PIR-based security systems, RFID-based security systems, laser security alarms, and biometric systems. Moreover, digital locks that can be operated through smartphones eliminate the need for multiple keys, allowing a single device to control all the locks, leveraging the concept of Internet of Things (IoT).
In this particular project, we present a comprehensive guide on building a simple electronic code lock using an 8051 microcontroller. This lock can only be unlocked by entering a pre-defined code, triggering a siren or buzzer as an alert if an incorrect code is entered. Additionally, we have previously developed a digital lock using Arduino, further enhancing our expertise in this field.