Password-Based Door Lock System Using Arduino and Keypad

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Say goodbye to keys!
Let's make a simple password-based door lock system using Arduino, a solenoid lock, a keypad matrix, and an LCD screen. It is a very useful project for school and college projects.

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Will it work with changed password once it is switched off and on again? If answer is no then it is not for practical use.

PatnaikUC
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I don't have the Keyes_SRly. Any alternatives? The only material I don't have.

mariosonicasdx
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Does the library really matter from wich programmer it is? I found the Liquid Crystal I2C but it wasnt from Marco Shwartz

Tibo-fs
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this works great but when you loose power and rer instate power the relay clicks in and out so the door will unlock with power interuption...

robindraycott
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It is okay that our relay is single channel (12 volts) and our supply is 12v or 9v?? For project purpose only . Thank you

darwinyee
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I don't think it's a good idea to display the password for your door lock. Instead, display an asterisk..

Schjoenz
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Not working he is giving us wrong Code don't try it waste of time

abhayvishwakarma
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