Giving an apartment keyless entry

The key for [rybitski]’s apartment is a copy of a copy of a copy, and the landlord lost the original key years ago. The lock itself still works, but opening it with [rybiski]’s key is a chore. He wanted to make it easier to get into his apartment, and with Arduinos and such he figured he could make a keyless entry device for his front door.

After figuring out how to open his deadbolt with an Arduino and a rather powerful servo, [rybiski] looked into wireless control options. He found a keyless entry remote, complete with receiver, that integrated perfectly to just about any microcontroller project.

After mounting the Arduino, receiver, and servo on a piece of plastic, he attached his contraption to the deadbolt. In the video after the break, you can see his key fob remote locking and unlocking the deadbolt, all without jamming an ill-fitting key into the lock.

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Keyless entry using touch sensing

[Alex] sent us this slick little keyless entry system. He wanted a discreet way to trigger the door to unlock. Knocking was too loud, and would give away his secret access code. He decided that touch sensors would be the best. Initially he planned on using the doorknob itself, which would have been awesome, but it was just too much surface area for his touch sensor. Ultimately, he settled for a wire he could touch.  An Arduino detects whether or not the correct code has been put in and initializes a high torque servo which turns the doorknob from the inside.  In the video, after the break, you can see that it works fairly well.

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