Manual

6.5 Adjusting the reference resistor

The plyon® ﬂex sensor changes resistance depending on the applied force. For the

correct readout of the sensor, a voltage divider is used. The sensor is wired in series

with a reference resistance and a voltage of 3.3V is applied. An analog-to-digital

converter (ADC) is connected to the center node of the divider. By making use of the

measured output voltage, the input voltage of 3.3V, and the reference resistance, the

resistance of the sensor can be computed.

The left/lower rotary potentiometer allows full manual control over the reference

resistor in a value range between 0 to 20 kΩ.