misterT Well-Known Member Most Helpful Member Dec 30, 2012 #22 The sensor measures capacitance between the metal cylinder and the device casing. https://www.youtube.com/watch?v=Z2sl0SHdHPg Last edited: Dec 30, 2012
The sensor measures capacitance between the metal cylinder and the device casing. https://www.youtube.com/watch?v=Z2sl0SHdHPg
A arvinfx Member Dec 30, 2012 #23 But as you can see in these pictures there is resistor between sensor and case!
alec_t Well-Known Member Most Helpful Member Dec 30, 2012 #24 There's no apparent reason why resistance shouldn't be present. If I were trying to measure a change in capacitance (assuming the sensor is a capacitive type) one option would be to use an RC-oscillator and sense a frequency shift.
There's no apparent reason why resistance shouldn't be present. If I were trying to measure a change in capacitance (assuming the sensor is a capacitive type) one option would be to use an RC-oscillator and sense a frequency shift.
alec_t Well-Known Member Most Helpful Member Dec 30, 2012 #26 No; but even if I did the site upload function doesn't work for me.