Contents
How does a flex sensor work?
The flex sensor you linked to uses flexible conductive ink printed on flexible base forming a resistor. It works when bent with the ink on the outside of the curve. When bent, the conductive layer is stretched and thus extends, resulting in reduced cross section (imagine stretching a rubber band).
What does flex sensor detect?
A flex sensor or bend sensor is a sensor that measures the amount of deflection or bending. Usually, the sensor is stuck to the surface, and resistance of sensor element is varied by bending the surface.
How do you find the resistance of a flex sensor?
float Vflex = ADCflex * VCC / 1023.0; Next, we calculate the resistance of the flex sensor using the formula derived from the voltage divider formula and display it on the serial monitor. float Rflex = R_DIV * (VCC / Vflex – 1.0); Serial. println(“Resistance: ” + String(Rflex) + ” ohms”);
What kind of circuit is a flex sensor?
It is a simple voltage divider circuit. The following image shows the basic flex sensor circuit consisting of a voltage divider (formed by the flex sensor itself and a 10KΩ Resistor) and an Operational Amplifier (Op-Amp).
What does Vo mean on a flex sensor?
Vo being output voltage and also the voltage across the FLEX SENSOR. Vo = VCC (Rx/ (R1+Rx)). Now, when the FLEX SENSOR is bent the terminal resistance increases. This increase also appears in VOLTAGE DIVIDER circuit.
How does a flex sensor work on a door?
The sensor could be fixed at door edge and when the door opens the Flex sensor gets flexed. With the sensor being flexed its parameters changes which could be designed to provide an alert. Case2: Where you want to measure the FLEX or BENT or ANGLE change of any instrument or device.
What kind of solder to use on flex sensor?
While they use a force sensitive resistor, the steps to solder to a flex sensor’s solder tabs are the same. As an alternative, users can use the Amphenol FCI Clincher connector to make a reliable connection to the sensor and provide a small amount of strain relief on the crimped connector.