35mm Piezoelectric Sensor without Wire

Component Documentation: 35mm Piezoelectric Sensor without Wire

Overview

The 35mm Piezoelectric Sensor without Wire is a compact, wire-free sensor designed to detect vibrations, impacts, and movements. It uses piezoelectric materials to convert mechanical stress into electrical signals, making it an ideal choice for IoT applications such as shock detection, vibration monitoring, and proximity sensing.

Technical Specifications

Diameter: 35mm
 Thickness: 2.5mm
 Operating Temperature: -20C to 70C
 Sensitivity: 10mV/g (10%)
 Frequency Range: 1Hz to 10kHz
 Output Impedance: 1k (20%)
 Power Supply: None (passive device)

Code Examples

### Example 1: Basic Vibration Detection using Arduino

In this example, we'll use the 35mm Piezoelectric Sensor without Wire to detect vibrations and trigger an LED to turn on when a threshold is exceeded.

Hardware Requirements:

35mm Piezoelectric Sensor without Wire
 Arduino Board (e.g., Uno or Nano)
 LED
 Breadboard
 Jumper Wires

Software Requirements:

Arduino IDE

Code:
```c
const int sensorPin = A0;  // Analog input pin for sensor
const int ledPin = 13;    // Digital output pin for LED
const int threshold = 200; // Adjust this value to set the vibration threshold

void setup() {
  pinMode(ledPin, OUTPUT);
}

void loop() {
  int sensorValue = analogRead(sensorPin);
  if (sensorValue > threshold) {
    digitalWrite(ledPin, HIGH);
  } else {
    digitalWrite(ledPin, LOW);
  }
  delay(10); // Adjust this value to set the sampling rate
}
```
### Example 2: IoT-based Shock Detection using Raspberry Pi and Python

In this example, we'll use the 35mm Piezoelectric Sensor without Wire to detect shocks and send a notification to a remote server using Python and the Raspberry Pi.

Hardware Requirements:

35mm Piezoelectric Sensor without Wire
 Raspberry Pi
 Breadboard
 Jumper Wires

Software Requirements:

Python 3.x
 RPi.GPIO library
 requests library (for HTTP requests)

Code:
```python
import RPi.GPIO as GPIO
import time
import requests

GPIO.setmode(GPIO.BCM)
sensor_pin = 17  # GPIO pin for sensor
threshold = 200  # Adjust this value to set the shock threshold

def send_notification():
    url = "https://example.com/notify"
    headers = {"Content-Type": "application/json"}
    data = {"event": "shock_detected"}
    response = requests.post(url, headers=headers, json=data)
    print("Notification sent:", response.status_code)

while True:
    sensor_value = GPIO.input(sensor_pin)
    if sensor_value > threshold:
        send_notification()
    time.sleep(0.1)  # Adjust this value to set the sampling rate
```
Note: In this example, we assume you have a remote server set up to receive notifications. You'll need to modify the `url` variable to point to your server's API endpoint.

Tips and Considerations

When using the 35mm Piezoelectric Sensor without Wire, ensure proper mounting and mechanical coupling to maximize sensitivity and accuracy.
 For more advanced applications, consider using signal conditioning circuits or filters to improve signal quality and reduce noise.
 When working with high-impedance sensors like this one, ensure your analog-to-digital converter (ADC) has a suitable input impedance to prevent signal attenuation.