Knock Knock from arduino servo motor code Watch Video
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Description: Everyone is always busy. This is a fact. So what happens when the doorbell rings at the office? We ignore it. The most annoying is when one of our colleagues forgets to bring the damn RFID card! nSo, with a little bit of soldering, programming and creativity we turned the activity of knocking into a password protected door-opening system. nContact microphones were attached on the glass surface of the door and a servo below the RFID reader. When you enter the five-digit code, by knocking on the c
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