Hi all, I am doing a project in which I am making a lock. The lock unlocks via keypad, and I want to have different things going on once it is unlocked. I would like to give the user the option to press the D key on the keypad to re-lock it, however if it is not re-locked in 5 minutes set off an ala…

Keep Track of minutes and seconds Arduino

robtillaart April 5, 2014, 8:26pm 2

google the time library!

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