1070 Adafruit

Special Edition LengthSpecial Edition Length Features - Angle Displacement Measurement - Bends and Flexes physically with motion device - Possible Uses - Robotics - Gaming (Virtual Motion) - Medical Devices - Computer Peripherals - Musical Instruments - Physical Therapy - Simple Construction - Low Profile Mechanical Specifications Electrical Specifications -Life Cycle: >1 million -Flat Resistance: 25K Ohms -Height: 0.43mm (0.017 ) -Resistance Tolerance: 30% -Temperature Range: -35C to +80C -Bend Resistance Range: 45K to 125K Ohms (depending on bend radius) -Power Rating : 0.50 Watts continuous. 1 Watt Peak Dimensional Diagram - Stock Flex Sensor PART LENGTH 73.66 2.900 ACTIVE LENGTH 55.37 2.180 6.35 0.250 How to Order - Stock Flex Sensor FS L 0055 253 ST Series Model Active Length Resistance Connectors FS = Flex Sensor L = Linear 0055 = 55.37mm 253 = 25K Ohms ST = Solder Tab How It Works Flat (nominal resistance) 45 Bend (increased resistance) 90 Bend (resistance increased further) spectrasymbol.com Rev A2 - Page 1 (888) 795-2283Schematics Following are notes from the ITP Flex Sensor WorkshopThe impedance buffer in the Basic Flex Sensor Circuit (above) is a single sided operational amplifier, used with these sensors because the low bias current of the op amp reduces errer due to source impedance of the flex sensor as voltage divider. Suggested op amps are the LM358 or LM324 You can also test your flex sensor using the simplest circut, and skip the op ampAdjustable Buffer - a potentiometer can be added to the circuit to adjust the sensitivity range Variable Deflection Threshold Switch - an op amp is used and outputs either high or low depending on the voltage of the inverting input. In this way you can use the flex sensor as a switch without going through a microcontroller Resistance to Voltage Converter - use the sensor as the input of a resistance to voltage converter using a dual sided supply op-amp. A negative reference voltage will give a positive output. Should be used in situations when you want output at a low degree of bending spectrasymbol.com Page 2 (888) 795-2283