1.Force Sensor Serial print

 Force Sensor Serial print

Circuit:

  1. Connect one end of the FSR to 5V.
  2. Connect the other end of the FSR to an analog pin (e.g., A0) and a 10kΩ resistor.
  3. Connect the other side of the resistor to GND, creating a voltage divider.

Code:

The code below reads the analog value from the FSR and converts it into weight using a simple calibration factor.

C++Code


int fsrPin = A0; // Analog pin connected to FSR int fsrReading; // Variable to store the FSR reading float calibrationFactor = 0.5; // Calibration factor to convert FSR reading to weight (example value) void setup() { Serial.begin(9600); // Start serial communication at 9600 baud } void loop() { fsrReading = analogRead(fsrPin); // Read the value from FSR float voltage = fsrReading * (5.0 / 1023.0); // Convert analog reading to voltage // Convert voltage to force (in Newtons or weight in grams based on calibration) float weight = voltage * calibrationFactor; Serial.print("FSR Reading: "); Serial.print(fsrReading); Serial.print(" | Voltage: "); Serial.print(voltage); Serial.print(" V | Weight: "); Serial.print(weight); Serial.println(" g"); delay(500); // Add delay for readability }

Explanation:

  1. Calibration:

    • The calibrationFactor is used to convert the voltage reading to a weight estimate. This value must be determined experimentally by using a known weight.
    • Place known weights on the FSR, measure the voltage, and adjust calibrationFactor to achieve an accurate weight reading.
  2. Voltage Conversion:

    • fsrReading * (5.0 / 1023.0) converts the analog reading (0-1023) to a voltage value (0-5V).
  3. Weight Calculation:

    • The voltage is multiplied by the calibration factor to estimate the weight in grams (or another unit).

Calibration Process:

  1. Place a known weight on the FSR.
  2. Note the corresponding voltage or FSR reading.
  3. Adjust the calibrationFactor in the code so that the calculated weight matches the known weight.
  4. Repeat for better accuracy.

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