Single Button Force Sensing Resistor

Posted on Feb 5, 2014

The FlexiForce sensor acts as a force sensing resistor in an electrical circuit. When the force sensor is unloaded, its resistance is very high. When a force is applied to the sensor, this resistance decreases. The resistance can be read by connecting a multimeter to the outer two pins, then applying a force to the sensing area. Figure 1 below sho

Single Button Force Sensing Resistor
Click here to download the full size of the above Circuit.

ws both the Force vs. Resistance and Force vs. Conductance (1/R). Note that the conductance curve is linear, and therefore useful in calibration. One way to integrate the FlexiForce sensor into an application is to incorporate it into a force-to-voltage circuit. A means of calibration must then be established to convert the output into the appropriate engineering units. Depending on the setup, an adjustment could then be done to increase or decrease the sensitivity of the force sensor. Figure 2 below shows a typical sensor response (based on our recommended drive circuit ). We also offer a complete force measurement system. The ELF System is a turnkey package containing force measurement software, electronics, and force sensors. The FlexiForce force sensor is an ultra-thin, flexible printed circuit. The standard A201 force sensor is constructed of two layers of substrate (polyester) film. The high-temp model (HT201) is constructed of two layers of polyimide. The active sensing area is defined by the silver circle on top of the pressure-sensitive ink. Silver extends from the sensing area to the connectors at the other end of the sensor, forming the conductive leads. A201 sensors are terminated with male square pins, allowing them to be easily incorporated into a circuit. The two outer pins of the connector are active and the center pin is inactive. FlexiForce Sensors measure force between virtually any two mating surfaces....

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Operating Systems Latency Measurement and Analysis
    Schematic Diagram LM1877 Audio power amplifier circuit
    Make a Remote Controlled Toy Car Circuit
    usb powered lithium ion battery charger
    Voice modulator circuit
    Loudspeaker Protector Monitors Current
    usb switch schematic circuit
    Hydraulic system
    Inductive Proximity Sensors
    Servoelectric Guitar Project