Keyless Door Convert

|Why I make it?|
I come up with this project because i usually forgot my key back home, but the main reason i make this is for fun ;).
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|Part List|
-Servo 996R
-Arduino Nano
-Press Button
-Adafruit Electret Microphone Amplifier with Adjustable Gain
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|How it work?|
The input of this device is a pattern of knocks(from outside) or hold button(from inside).
If the pattern match with the key, or button is holding, the device will open the lock for 5s.
|F3D (FUSION 360)|
I provide the draw file so you could change the dimension to fit your lock, and the motor you use.
|Wiring Diagram|
Servo(Signal) -> Digital 4
Servo(Pwd) -> 5 Volt
Button -> Digital 3
Button(Pwd) -> 5 Volt
***PS: for the Button wiring you should follow the in instruction from your seller. Button might require a resistor .
Electret Microphone(Signal) -> Analog 0
Electret Microphone(Pwd) -> 3.3 Volt
External (Positive) -> Vin
and ALL Ground -> Ground