Uploaded October 2023 | Updated September 2026, 1 day ago
Eighth part, about minimizing reference sensors creep plus more math …
↓↓↓ Complete description, time index and links below ↓↓↓
In the seventh video we added a reference sensor to make our measurements independent from the dielectric constant of the liquid. However, our first reference sensor capacitance was not constant (link below). So let’s solve this problem.
First we measure the reference creep of our second sensor version. We follow up by some more generalized math. Then we try to reduce the reference creep further electronically. Finally we put everything through its paces with water and saline.
00:00 Intro – changing dielectric constant of measured liquid
00:58 Reference sensor 2 – much reduced reference creep
04:03 Mathematics – generalized formula with gain and offset
09:11 Sensor geometry improvements – to reduce reference creep
11:43 Electronically reducing reference creep – not that easy
17:45 Reference sensor code – just a few lines more
20:37 Reference sensor test – with water and saline
29:52 Wrap-up – at least one more part to come, 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 (7): Reference Sensor (1) youtu.be/XDtQKoT6Zyo
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 Level Sensing Using Capacitive-to-Digital Converters | Analog Devices analog.com/en/analog-dialogue/articles/liquid-level-sensing-using-cdcs.html
#liquid #sensor #capacitance #capacity #capacitor #tutorials #tutorial #how-to #robertssmorgasbord
Eighth part, about minimizing reference sensors creep plus more math …
↓↓↓ Complete description, time index and links below ↓↓↓
In the seventh video we added a reference sensor to make our measurements independent from the dielectric constant of the liquid. However, our first reference sensor capacitance was not constant (link below). So let’s solve this problem.
First we measure the reference creep of our second sensor version. We follow up by some more generalized math. Then we try to reduce the reference creep further electronically. Finally we put everything through its paces with water and saline.
00:00 Intro – changing dielectric constant of measured liquid
00:58 Reference sensor 2 – much reduced reference creep
04:03 Mathematics – generalized formula with gain and offset
09:11 Sensor geometry improvements – to reduce reference creep
11:43 Electronically reducing reference creep – not that easy
17:45 Reference sensor code – just a few lines more
20:37 Reference sensor test – with water and saline
29:52 Wrap-up – at least one more part to come, 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 (7): Reference Sensor (1) youtu.be/XDtQKoT6Zyo
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 Level Sensing Using Capacitive-to-Digital Converters | Analog Devices analog.com/en/analog-dialogue/articles/liquid-level-sensing-using-cdcs.html
#liquid #sensor #capacitance #capacity #capacitor #tutorials #tutorial #how-to #robertssmorgasbord
