Raspberry Pi Used To Unlock Door By Hearing A Dog's Bark [Video] Ubergizmo David Hunt is the man behind the hack, which he calls the Pi-Rex, by using the Raspberry Pi ,a motor driver PCB circuit and a noise detector circuit. Once his contraption detects his dog's bark, it then proceeds to drive its actuator to unlock the door ..

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Raspberry Pi Used To Unlock Door By Hearing A Dog’s Bark [Video] – Ubergizmo