Microcontroller Base Password Protected Door Lock System Using Android Mobile Phone

Abstract

Nowadays mobile phone is an important part of our life. And if the mobile is an android mobile then it is more important and useful in our daily life. We can use an Android Mobile in various purpose. In this project, we have designed and developed a Micro controller base Door lock system using Android mobile phone. We can control ( Lock/Unlock) solenoid door lock (operated by 12V) by entering password on Android phone. Here, we used an Arduino UNO board as the main controlling unit, HC-05 Bluetooth module as Bluetooth sensor , transistor ,diode. A program has been developed and burnt into the microcontroller of the arduino module. This system is constructed and tested and found to work satisfactorily. The developed system can be used in any door even in vault. Finally the system can be used for other application with a little modification e.g., Alarm, or other security purpose.