Electric Lock With Vibrating Sensor

We have made a prototype of an electric door lock with vibrating sensor. We hope you like it. Here's how we made it.

WHAT? Electric lock with vibrating sensor.

WHY? For the safety of the school.

FOR WHOM? For the school.

MATERIALS:

1. Arduino UNO

2. Breadboard

3. Vibration sensor

4. Solenoid lock

5. Wires

6. Relay

HOW TO BUILD:

1. Place the vibration sensor on the Breadboard.Connect a wire from the first pin(S) to A0 Analog pin on Arduino UNO. Then connect a wire from positive pin of vibration sensor to GND on Arduino UNO. Now connect a wire from negative pin to 5V on Arduino UNO.

2. Place the relay on the breadboard. Connect a wire from the first pin(S) to 2 digital pin on Arduino UNO. Then connect a wire from positive pin of relay to the line of negative pin. Now connect a wire from negative pin of relay to GND on Arduino UNO. Connect a wire from the 'common' pin to GND on Arduino UNO. Then connect a wire from the NO pin on the relay to a pin on the solenoid lock.

3. Connect a wire from second pin of solenoid lock to 3.3V on Arduino UNO.

CODE:

int elock = 2;

void setup() {

pinMode(A0, INPUT);

pinMode(elock, OUTPUT);

Serial.begin(9600);

}

void loop() {

int vsensor = analogRead(A0);

Serial.printIn(vsensor);

if(vsensor<1000)

digitalWrite(elock,HIGH);

}