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.

Electronic lock circuit using microcontroller.

But today here we are building the code lock. Digital code locks are very popular in electronics where you need to enter a particular code to open the lock. 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. After taking inputs from a user.

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. Electronic lock using pic microcontroller circuit diagram. A four digit predefined password is specified in the microcontroller at89c51 s program.

Many electronic code lock are available in market some using microcontroller and many more using discrete electronics components. Circuit diagram of electronics lock is shown below. We have already built these kinds of digital locks using arduino using raspberry pi and using 8051 microcontroller. The password is entered by making use of a keypad.

A 4 3 matrix keypad and a 16 2 lcd have been used here. Pic16f877a microcontroller reads these inputs and compared it with a already stored password. Default password 1234 is stored in eeprom of pic microcontroller. 555 timer electronic door lock.

Raspberry pi digital 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. 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.

They are provided with an access control system. Working of electronic lock. This controller requires a supply voltage of 5v dc. But because of large components it uses they are bulky and cannot be handy to use.

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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.