In this video, I will present to you a project idea. Lets call it a Door Lock Security System. The idea here is to control the door lock using an Arduino board. Anyone who wish to enter is requested to input the user password. If the input password is correct, it will trigger the servo motor to unlock the door for some time then it will automatically lock again while 3 consecutive incorrect password will trigger an alarm. The alarm can only disabled by entering the admin password.
For more details including the circuit diagram and Arduino source code, visit my blog post:
techtotinker.c...
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