1.Force Sensor Serial print
Force Sensor Serial print
Circuit:
- 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, 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:
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.
- The
Voltage Conversion:
fsrReading * (5.0 / 1023.0)
converts the analog reading (0-1023) to a voltage value (0-5V).
Weight Calculation:
- The voltage is multiplied by the calibration factor to estimate the weight in grams (or another unit).
Calibration Process:
- Place a known weight on the FSR.
- Note the corresponding voltage or FSR reading.
- Adjust the
calibrationFactor
in the code so that the calculated weight matches the known weight. - Repeat for better accuracy.
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