Square Force-Sensitive Resistor - Original Documentation

Component Description

Square Force-Sensitive Resistor (FSR) - Original

Overview

The Square Force-Sensitive Resistor (FSR) - Original is a versatile and popular sensor component designed to detect changes in physical force or pressure applied to its surface. This component is a type of piezoresistive sensor that exhibits a decrease in electrical resistance when subjected to increasing force or pressure, making it a reliable and accurate way to measure weight, pressure, or touch in various applications.

Functionality

The Square FSR - Original operates on the principle of piezoresistivity, where the electrical resistance of the material changes in response to mechanical stress or pressure. When no force is applied, the sensor has a high electrical resistance. As force or pressure is applied, the resistance decreases, allowing for the measurement of the applied force.

Key Features

Sensitive Area: The sensor has a square-shaped sensitive area with a dimensions of 1.5 inches (38 mm) per side, making it suitable for various applications where space is limited.
Force Range: The Square FSR - Original is capable of detecting forces in the range of 0.1 N to 10 N (0.02 lbf to 2.2 lbf), with a maximum recommended force of 20 N (4.4 lbf).
Response Time: The sensor responds quickly to changes in force, with a typical response time of less than 100 microseconds.
Operating Temperature: The Square FSR - Original operates within a temperature range of -20C to 70C (-4F to 158F), making it suitable for use in various environmental conditions.
Electrical Characteristics:

Current Draw

1 mA (max)

Mounting Options: The sensor can be mounted using adhesive, screws, or clips, making it easy to integrate into various devices and systems.
Durability: The Square FSR - Original is designed to withstand repeated use and is suitable for applications requiring high durability and reliability.

Typical Applications

Robotics and Automation: Force sensing in robotic arms, grippers, and end-effectors.
Medical Devices: Pressure monitoring in medical devices, such as blood pressure monitors and hospital beds.
Industrial Automation: Force sensing in industrial automation applications, such as weight measurement and material handling.
Gaming and Entertainment: Force feedback in gaming controllers and simulation systems.
Accessibility Devices: Pressure sensing in assistive technology devices, such as wheelchair seating systems.

Important Notes

When handling the Square FSR - Original, avoid applying excessive force, which can damage the sensor.

The sensor should be used in a clean and dry environment to ensure optimal performance.

Calibration may be required for precise force measurements, and users should consult the datasheet for specific calibration procedures.

By understanding the Square Force-Sensitive Resistor - Original's functionality and key features, designers and developers can effectively integrate this versatile sensor into their projects, enabling accurate force measurement and control in a wide range of applications.

Pin Configuration

Square Force-Sensitive Resistor (FSR) - Original: Pin Description and Connection Guide
The Square Force-Sensitive Resistor (FSR) is a popular IoT component used to measure the force or pressure applied to its surface. It's a simple, low-cost, and easy-to-use sensor that provides a variable resistance output based on the applied force. The Original Square FSR has four pins, which are described below:
Pin Description:
1. VCC (Power):
Function: Positive power supply pin
Connection: Connect to a positive voltage source (e.g., 3.3V or 5V) from your microcontroller or power supply
2. OUT (Output):
Function: Output pin that provides a variable resistance output based on the applied force
Connection: Connect to an analog-to-digital converter (ADC) or a voltage divider circuit to measure the output voltage
3. GND (Ground):
Function: Ground pin
Connection: Connect to the ground pin of your microcontroller or power supply
4. IN (Input):
Function: Not used in the Original Square FSR; can be left unconnected or tied to GND
Connection Structure:
To connect the Square FSR to your microcontroller or circuit, follow this structure:
VCC -> Power Supply (+3.3V or +5V)
GND -> Power Supply GND
OUT -> ADC Input or Voltage Divider Circuit
IN -> Leave unconnected or tie to GND (not used in the Original Square FSR)
Example Connection Diagram:
Here's a simple example connection diagram using an Arduino Uno microcontroller:
```
+-----------+
| Square FSR |
+-----------+
|
|
v
+-----------+ +-----------+
| Arduino Uno | | Breadboard |
+-----------+ +-----------+
| |
| |
v v
+-----------+ +-----------+
| VCC (5V) | | GND |
+-----------+ +-----------+
| |
| |
v v
+-----------+ +-----------+
| OUT (A0) | | 10k |
+-----------+ +-----------+
|
|
v
+-----------+
| GND |
+-----------+
```
In this example, the Square FSR is connected to the Arduino Uno's 5V power supply, and the output pin is connected to analog input A0. A 10k resistor is used to create a voltage divider circuit to measure the output voltage.
Remember to adjust the connection diagram according to your specific microcontroller or circuit requirements.

Code Examples

Square Force-Sensitive Resistor - Original

Description:
The Square Force-Sensitive Resistor (FSR) is a sensor that changes its electrical resistance in response to changes in the force or pressure applied to it. The FSR is a simple, low-cost, and versatile sensor that can be used in a variety of applications, including robotics, automation, and human-computer interaction.

Technical Specifications:

Active area: 1.5" x 1.5" (3.8 cm x 3.8 cm)
 Resistance range: 100 k to 1 M
 Force range: 0.1 N to 10 N
 Power supply: 5V
 Output: Analog signal

Code Examples:

### Example 1: Basic Force Sensing with Arduino

In this example, we will connect the FSR to an Arduino board and read the analog signal to detect changes in force applied to the sensor.

Hardware Requirements:

Square Force-Sensitive Resistor - Original
 Arduino Board (e.g., Arduino Uno)
 Breadboard
 Jumper wires

Code:
```c
const int fsrPin = A0;  // Analog input pin for FSR

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

void loop() {
  int fsrReading = analogRead(fsrPin);
  float force = fsrReading / 1023.0  10.0; // Convert analog reading to force in Newtons
  Serial.print("Force: ");
  Serial.print(force);
  Serial.println(" N");
  delay(100);
}
```
In this code, we read the analog signal from the FSR using the `analogRead()` function and convert it to a force value in Newtons using a simple linear scaling.

### Example 2: Debounced Force Sensing with Raspberry Pi (Python)

In this example, we will connect the FSR to a Raspberry Pi and use a debouncing technique to reduce noise and improve the accuracy of the force sensing.

Hardware Requirements:

Square Force-Sensitive Resistor - Original
 Raspberry Pi
 Breadboard
 Jumper wires

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

# Set up GPIO pin for FSR
GPIO.setmode(GPIO.BCM)
fsr_pin = 17
GPIO.setup(fsr_pin, GPIO.IN, pull_up_down=GPIO.PUD_UP)

def debounce(fsr_pin, timeout=50):
    """Debounce the FSR signal"""
    start_time = time.time()
    while time.time() - start_time < timeout / 1000.0:
        if GPIO.input(fsr_pin) == GPIO.LOW:
            return True
    return False

while True:
    if debounce(fsr_pin):
        print("Force detected!")
        time.sleep(0.1)
```
In this code, we use the `RPi.GPIO` library to read the digital signal from the FSR and implement a debouncing technique to reduce noise and improve the accuracy of the force sensing. When the force is detected, the code prints a message to the console.

Note: The code examples provided are for illustration purposes only and may require modifications to work with specific hardware configurations and applications.

Square Force-Sensitive Resistor - Original

Component Description

Nominal Resistance

Operating Voltage

Current Draw

Pin Configuration

Code Examples

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Square Force-Sensitive Resistor - Original

Component Description

Nominal Resistance

Operating Voltage

Current Draw

Pin Configuration

Code Examples