The secret knock detector project 2013-01-17

Introduction and Overview

The Secret Knock Detector project is a variation of Steve Hoefer’s Secret Knock Detecting Door Lock, which is featured on Grathio Labs. The original project used an Arduino microcontroller board to sense knocks on a door, and to compare the timing ratio between knocks to a secret knock that was previously recorded. If the timing was correct, the device would engage a small geared...

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