Instrumentatio n: Smart Door Knocker Authorized by: Berlin Richad Simanjuntak Dinda Eka Pratiwi Rifqi Nugraha 2A-Refrigeration and Air Conditioning Polytechnic State of Bandung
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Instrumentation:Smart Door KnockerAuthorized by:
Berlin Richad SimanjuntakDinda Eka PratiwiRifqi Nugraha
2A-Refrigeration and Air Conditioning
Polytechnic State of Bandung
Source:http://www.instructables.com/id/Secret-Knock-Detecting-Door-Lock/
with title:Secret Knock Detecting Door Lock
The Equipments 1. Arduino UNO R3 2. Servo 3. LED 4. Resistors 5. Buzzer 6. Piezoelectric 7. Push Button 8. Cable for jumper 9. Protoboard 10. PCB
Original Wiring
Wiring with Modification
Process
Piezoelectric receive a knock
signal
The Signal received by
microcontroller
The microcontroller processed the
actuator
Software and Program
If we want to control the arduino, we must input the program by using software Arduino IDE. First we should adapt the COM of the Arduino with our software. Then, we should choose the same board between the Arduino and the software (example: Board Arduino Genuino Uno, COM 11).
The trouble when making “Smart Door Knocker”
1. To adjust the signal input into the piezoelectric in order to compare with frequency of a knock.
2. The function of push button sometimes didn’t work.
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