Electronic Lock Circuit Using Microcontroller

555 timer electronic door lock.

Electronic lock circuit using microcontroller.

This type of locks needs a microcontroller to compare the entered code with the predefined code to open the lock. A four digit predefined password is specified in the microcontroller at89c51 s program. Raspberry pi digital code lock. Default password 1234 is stored in eeprom of pic microcontroller.

An electronic lock or digital lock is a device which has an electronic control assembly attached to it. Circuit diagram of electronics lock is shown below. Here an at89c52 microcontroller is used and it is an 8 bit controller. A 4 3 matrix keypad and a 16 2 lcd have been used here.

This controller requires a supply voltage of 5v dc. This system allows the user to unlock the device with a password. Using codes for the purpose of a security has been the popular trend recently. But because of large components it uses they are bulky and cannot be handy to use.

But today here we are building the code lock. Keypad and lcd are very commonly used input output devices respectively. Password based door lock system using 8051 microcontroller circuit design uses five major components a microcontroller an l293d motor driver a dc motor a 4 4 matrix keypad and a 16 2 lcd. Digital code locks are very popular in electronics where you need to enter a particular code to open the lock.

The password is entered by making use of a keypad. Electronic lock takes inputs from the user with the help of 4x4 keypad. A similar type of electronic project is presented right below called electronic code lock circuit which ensures the use of four digits in code locking process and these codes are keyed in remotely. If the entered password from keypad matches with this password then the lock opens and a message is displayed on lcd also an output pin is made high to be used for further.

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Many electronic code lock are available in market some using microcontroller and many more using discrete electronics components. 16 x 2 lcd liquid. After taking inputs from a user. They are provided with an access control system.

Before building our password door locking project first we need to collect the required components and then go ahead and follow the step by step building process.