Uploaded October 2023 | Updated September 2026, 1 day ago
Seventh part, about reference sensors and varying dielectric constant …
↓↓↓ Complete description, time index and links below ↓↓↓
In the sixth video we accurately measured the capacitance of our sensor with just an Arduino and a resistor, exploiting the RC circuit charging curve (link below). But then I mentioned that the relative permittivity of our fluid might change.
So this time we solve that problem by using a reference sensor. We build one and do some test measurements. Then we calculate the level of our fluid, independent from its dielectric constant. Another part with an improved sensor will follow.
00:00 Intro – changing dielectric constant of measured liquid
01:00 Solution – using a level independent reference sensor
04:31 Reference sensor 1 – naive approach with known flaws
11:41 Hardware – now with a LEGO® compatible breadboard
13:13 Software – just extended the old Arduino sketch
17:57 Measurements – analyzing signal and reference values
24:23 Mathematics – dielectric constant independent values
30:31 Reference sensor 2 – reducing creep by shielding
32:29 Wrap-up – next time we’ll test the new sensor, bye
Tutorials youtube.com/playlist?list=PLwq-2MnM58FKn3920rc1V0qoTsQDheTIw
Capacitive Liquid Level Sensing (1): Sensor Basics youtu.be/Jjcym2g2ruk
Capacitive Liquid Level Sensing (2): Measuring Capacity (1) youtu.be/h6ErXsIQWDU
Capacitive Liquid Level Sensing (3): Measuring Capacity (2) youtu.be/v-1B_c-3KQ4
Capacitive Liquid Level Sensing (4): Analog to Digital (1) youtu.be/6-uRvu_0WW8
Capacitive Liquid Level Sensing (5): Analog to Digital (2) youtu.be/BoutyoQyOQI
Capacitive Liquid Level Sensing (6): Analog to Digital (3) youtu.be/g8fjN2WKGN4
Capacitive Liquid Level Sensing (8): Reference Sensor (2) youtu.be/pKZHFjDShpM
Capacitive Liquid Level Sensing (9): Dielectric Constant Not Always Matters youtu.be/iQqXeQJgLbc
Capacitive Liquid Level Sensing (10): Errata, Miscellaneous, The End youtu.be/TdAnryA6h-M
My code drive.google.com/drive/folders/1nnl_Gb7OkkYhJTwuc848wvczO3PVb7s3?usp=sharing
#liquid #sensor #capacitance #capacity #capacitor #tutorials #tutorial #how-to #robertssmorgasbord
Seventh part, about reference sensors and varying dielectric constant …
↓↓↓ Complete description, time index and links below ↓↓↓
In the sixth video we accurately measured the capacitance of our sensor with just an Arduino and a resistor, exploiting the RC circuit charging curve (link below). But then I mentioned that the relative permittivity of our fluid might change.
So this time we solve that problem by using a reference sensor. We build one and do some test measurements. Then we calculate the level of our fluid, independent from its dielectric constant. Another part with an improved sensor will follow.
00:00 Intro – changing dielectric constant of measured liquid
01:00 Solution – using a level independent reference sensor
04:31 Reference sensor 1 – naive approach with known flaws
11:41 Hardware – now with a LEGO® compatible breadboard
13:13 Software – just extended the old Arduino sketch
17:57 Measurements – analyzing signal and reference values
24:23 Mathematics – dielectric constant independent values
30:31 Reference sensor 2 – reducing creep by shielding
32:29 Wrap-up – next time we’ll test the new sensor, bye
Tutorials youtube.com/playlist?list=PLwq-2MnM58FKn3920rc1V0qoTsQDheTIw
Capacitive Liquid Level Sensing (1): Sensor Basics youtu.be/Jjcym2g2ruk
Capacitive Liquid Level Sensing (2): Measuring Capacity (1) youtu.be/h6ErXsIQWDU
Capacitive Liquid Level Sensing (3): Measuring Capacity (2) youtu.be/v-1B_c-3KQ4
Capacitive Liquid Level Sensing (4): Analog to Digital (1) youtu.be/6-uRvu_0WW8
Capacitive Liquid Level Sensing (5): Analog to Digital (2) youtu.be/BoutyoQyOQI
Capacitive Liquid Level Sensing (6): Analog to Digital (3) youtu.be/g8fjN2WKGN4
Capacitive Liquid Level Sensing (8): Reference Sensor (2) youtu.be/pKZHFjDShpM
Capacitive Liquid Level Sensing (9): Dielectric Constant Not Always Matters youtu.be/iQqXeQJgLbc
Capacitive Liquid Level Sensing (10): Errata, Miscellaneous, The End youtu.be/TdAnryA6h-M
My code drive.google.com/drive/folders/1nnl_Gb7OkkYhJTwuc848wvczO3PVb7s3?usp=sharing
#liquid #sensor #capacitance #capacity #capacitor #tutorials #tutorial #how-to #robertssmorgasbord
