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Force-Sensing Resistor 610 x 6.3 mm Strip Cod POL1697
Electronica si Roboti Accesorii electronice Senzori Force-Sensing Resistor 610 x 6.3 mm Strip
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This force-sensing resistor (FSR) from Interlink Electronics is a passive component that exhibits a decrease in resistance when there is an increase in the force applied to the 610 x 6.3 mm active area, allowing you to create a sensor that is able to detect force or pressure.

The polymer thick film (PFT) device is optimized for use in human touch control of electronic devices and can sense an applied force ranging from a few dozen grams to over 10 kg.

Overview:                                  Instructiuni
This force-sensing resistor (FSR) from Interlink Electronics is a passive component that acts as a variable resistor, with resistance decreasing in response to increasing applied force, which makes it easy to add a touch interface to your project or create a robot with much more sophisticated tactile senses than are possible with simple lever switches. The polymer thick film (PFT) device is optimized for use in human touch control of electronic devices and can sense an applied force anywhere in the active area ranging from a few dozen grams to over 10 kg.

 

 

Force-sensing resistor (610 x 6.3 mm strip) close-up view with solder tabs.
 
In our tests, the resistance exceeded 1 MΩ with no applied pressure and ranged from around 100 kΩ to a few hundred Ohms as finger pressure varied from light (a few dozen grams) to heavy (pressing as hard as possible).
The resistance is very stable when the pressure is fixed, and the readings are very repeatable (there are no problems with hysteresis). This resistance range is well suited to work directly with the internal pull-ups many microcontrollers such as AVRs and PICs. The FSR was responsive enough and sensitive enough to distinctly pick up light, rapid finger tap, and it was even able to pick up the vibrations of a small vibration motor placed on it on the motor’s side.
 
Force-sensing resistor (610 x 6.3 mm strip) adhesive backing.
 
The 610 x 6.3 mm strip is flexible, light (5 g), and extremely thin (0.63 mm), and it has an active sensing area of 1.5"×1.5". It does not appreciably compress when pressure is applied. The FSR has a masked adhesive backing for easy mounting, and the 1.5" flexible male leads give you a convenient way to integrate the part into your project. The two leads have a 2.54 mm spacing, which means they are compatible with most solderless breadboards and perfboards, though the solder tabs are too short to work well with many 2.54 mm connectors.
 
Note that this FSR is not a load cell or strain gauge, and it is not suitable for precision measurements. While it can be used for dynamic measurement, only qualitative results are generally attainable. Force accuracy ranges from 5% to 25% depending on a number of factors, and the resolution is better than 0.5% of the full range.
 
This sensor should be mounted flat or with only a slight curve. Bending or kinking the strip applies pressure that changes the resistance and can lead to false measurements.
 
Specifications:
Size: 610 x 6.3 x 0.7 mm
Weight: 5 g
 
Example Applications:
- Pressure-sensitive touch user interface
- Drum strip for an electronic instrument
- Alarm system sensor:
1. alert when an object is removed
2. alert when intruder steps on it

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