3.FSR with Buzzer

 FSR with Buzzer

Circuit:

1. FSR Setup:
   • Connect one end of the FSR to 5V.
   • Connect the other end of the FSR to an analog pin (e.g., A0) and a 10kΩ resistor.
   • Connect the other side of the resistor to GND.
2. Buzzer Setup:
   • Connect the positive terminal of the buzzer to a digital pin (e.g., pin 11).
   • Connect the negative terminal of the buzzer to GND.

Code:

The code below reads the FSR value and activates the buzzer if the force exceeds a defined threshold.

C++Code
int fsrPin = A0;     // Analog pin connected to FSR
int fsrReading;      // Variable to store the FSR reading
int threshold = 600; // Threshold value to activate the buzzer

int buzzerPin = 11;  // Pin connected to the buzzer

void setup() {
  pinMode(buzzerPin, OUTPUT); // Set the buzzer pin as an output
  Serial.begin(9600);         // Start serial communication at 9600 baud
}

void loop() {
  fsrReading = analogRead(fsrPin); // Read the value from FSR

  Serial.print("FSR Reading: ");
  Serial.println(fsrReading); // Print the FSR reading

  if (fsrReading > threshold) {
    digitalWrite(buzzerPin, HIGH); // Turn on the buzzer if reading exceeds the threshold
  } else {
    digitalWrite(buzzerPin, LOW);  // Turn off the buzzer if reading is below the threshold
  }

  delay(500); // Add delay for readability
}

Explanation:

1. Threshold Setting:

   • The threshold value defines the FSR reading that will activate the buzzer. Adjust this value depending on how much force you want to trigger the buzzer.

2. Buzzer Control:

   • digitalWrite(buzzerPin, HIGH) will activate the buzzer when the FSR reading exceeds the threshold.
   • digitalWrite(buzzerPin, LOW) will deactivate the buzzer when the reading is below the threshold.

3. Testing and Calibration:

   • Use the Serial Monitor to observe the fsrReading values when different weights or forces are applied.
   • Adjust the threshold based on your needs to ensure the buzzer activates appropriately.