Password Based Door Lock project

Description

• The system contents three devices. input, process, and output device. the input device is the keypad.
• which will send all the input data to the next device which is Arduino.
• Arduino works here as a processing device.
• there is a matrix of 4×4 inside the keypad.
• and there are the 16 circuits when we press any key then anyone of the circuit will turn on. if we press the A key then the circuit below the button will activate and send this information to the Arduino.

before the keypress, all the circuit is turned off. the row and column make the circuit with the combination in a password-based door lock system using Arduino.

• when we press the key then the Arduino gets notified that which circuit is activated right now.

• and there is a character assigned with the circuit which can be shown on the serial monitor

• if you have some basic knowledge then you can easily observe the character into the serial monitor.

• and there may be errors occurred sometimes to get the right character which you can easily sort out.