Unlock a door with a knock ! ARDUINO

CIRCUIT DIAGRAM :- https://hackster.imgix.net/uploads/image/file/22993/F73TCBVI03OBRLO.LARGE.jpg?w=580&h=435&fit=max&fm=jpg&s=c92fd0d80a9bf8eb0660b2497bd05787 Connect your component together as shown in the schematics: connect 1Sheeld with Arduino connect AND gate with 1sheeld like in attached picture connect transistor with AND gate connect relay with transistor For more security, We use … Continue reading Unlock a door with a knock ! ARDUINO

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