TDK PS1240P02BT Piezo: Question about Protecting Arduino with Resisters.

Other Hardware Sensors
1

Hello all!

I just got my uno yesterday and is trying to retrofit a piezo element (PS1240P02BT) into a vibration sensor using the knock example.

Currently I only want to read the analog reading so I modified the code to the following:

const int viberationSensor = A0;

int sensorReading = 0;

void setup() { 
  Serial.begin(9600);
}

void loop() {
  sensorReading = analogRead(viberationSensor);
  Serial.println(sensorReading);
  delay(100);
}

Currently I can only receive zeros on the serial console when I put any resister that is equal or larger than 560 ohm in parallel to the piezo. (I could not get any data at all with 10k ohm resister.) Should I still put a resister to protect the arduino?

2

1-Do you know anything about working with audio electronics ?
2- What is your test signal that you are using to generate sound for the piezo to pick up ?
There is nothing in the code you posted to suggest there is anything whatsoever for the piezo to pick up so why are you expecting to get anything ?
3- Did you read the datasheet for the piezo ?
4- What are you using for amplification of the signal from the piezo ?
5- What is the frequency of your test signal ?
6- what is the response frequency of the piezo ?
7- What amplitude do you expect to get from the piezo ?
8- Can you draw a schematic of your piezo circuit interface with the arduino ?

  const int viberationSensor = A0;

int sensorReading = 0;

void setup() { 
  Serial.begin(9600);
}
void loop() {
  sensorReading = analogRead(viberationSensor);
  Serial.println(sensorReading);
  delay(100);
}