DIY PASSCODE LOCKER WITH ARDUINO

Connect the circuit with following connection:

R1 -> PIN 2
R2 -> PIN 3

R3 -> PIN 4

R4 -> PIN 5

C1 -> PIN 6

C2 -> PIN 7

C3 -> PIN 8

C4 -> PIN 9

Buzzer (+)-> PIN 10

Relay in -> PIN 11

1.Arduino Uno

2.4x4 keypad

3.Buzzer

4.Relay Module

First Upload the pass_initiator.ino skech to arduino to initiate the default password to arduino.

Then open Serial monitor.

Open the passlock.ino sketch & upload it to Arduino.

You are all set!

Press & hold * to change the password -> Type in old password -> Type in new password -> Press & hold # to save the new password.

Enjoy!