Flex Sensor

Flex Sensor 4.2" ROHS Compliant Description: A simple flex sensor 4.2" in length. As the sensor is flexed, the resistance across the sensor increases. The resistance of the flex sensor changes when the metal pads are on the outside of the bend (text on inside of bend). Connector is0.1" spaced and bread board friendly. Note: Please refrain from flexing or straining this sensor at the base. The usable range of the sensor can be flexed without a problem, but care should be taken to minimize flexing outside of the usable range. For best results, securely mount the base and bottom portion and only allow the actual flex sensor to flex.

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FLEX SENSOR 4.2






FLEX SENSOR

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FLEX SENSOR 4.2

Table of Contents
OVERVIEW ................................................................................................................................... 3
RELATED PRODUCTS ............................................................................................................ 8

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FLEX SENSOR 4.2

OVERVIEW
INTRODUCTION








Flex Sensor 4.2" ROHS Compliant Description: A simple flex sensor 4.2" in length. As the
sensor is flexed, the resistance across the sensor increases. The resistance of the flex sensor
changes when the metal pads are on the outside of the bend (text on inside of bend). Connector
is0.1" spaced and bread board friendly. Note: Please refrain from flexing or straining this sensor
at the base. The usable range of the sensor can be flexed without a problem, but care should be
taken to minimize flexing outside of the usable range. For best results, securely mount the base
and bottom portion and only allow the actual flex sensor to flex.
FEATURES
 Angle Displacement Measurement
 Bends and Flexes physically with motion device
 Possible Uses
 Low profile
 Simple construction

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FLEX SENSOR 4.2

APPLICATIONS
 Robotics
 Gaming (Virtual Motion)
 Medical Devices
 Computer Peripherals

SPECIFICATIONS
Parameter

Value

Life cycle >1 million
Height <0.43mm
Temperature range -35C to +80C

WORKING
The impedance buffer in the [Basic Flex Sensor Circuit] is a single sided operational amplifier,
used with these sensors because the low bias current of the op amp reduces error due to source
impedance of the flex sensor as voltage divider.

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FLEX SENSOR 4.2

SCHEMATIC AND CODE
ARM
http://forum.researchdesignlab.com/FLEX%20SENSOR/ARM/FLEX.jpg
http://forum.researchdesignlab.com/FLEX%20SENSOR/ARM/FLEX.c

ATMEL
http://forum.researchdesignlab.com/FLEX%20SENSOR/ATMEL/FLEX.jpg
http://forum.researchdesignlab.com/FLEX%20SENSOR/ATMEL/FLEX.c

PIC
http://forum.researchdesignlab.com/FLEX%20SENSOR/PIC/FLEX.jpg
http://forum.researchdesignlab.com/FLEX%20SENSOR/PIC/FLEX.c

ARDUINO
http://forum.researchdesignlab.com/aurdunio/sensors/Flex%20sensor/Flex%20sensor.png

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FLEX SENSOR 4.2



ARDUINO CODE
/*
* Project name:
FLEX Sensor
* Copyright
(c) Researchdesignlab.com
* Description:
* Test configuration:
MCU: ATMEGA328
Dev.Board: Arduino uno
Oscillator: 16 MHz

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FLEX SENSOR 4.2

Software: Arduino
*/
int sensorPin = A0; // select the input pin for the flex sensor
void setup()
{
Serial.begin(9600); // set up the LCD's number of columns and rows:
}
void loop()
{
Serial.print(analogRead(sensorPin));
Serial.print(" ");
}
OUTPUT

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FLEX SENSOR 4.2

RELATED PRODUCTS
PIC PROJECT BOARD PIC DEVELOPMENT BOARD










ATMEL PROJECT BOARD ATMEL DEVELOPMENT
BOARD