Uploaded September 2023 | Updated September 2026, 3 days ago
Fourth part, about measuring frequency and converting to a liquid level …
↓↓↓ Complete description, time index and links below ↓↓↓
In the third video we’ve build an RC oscillator around a Schmitt-trigger inverter, that changes it’s frequency with the capacitance of our sensor (link below). Now it’s time to measure that frequency with an MCU and output a liquid level.
We start by measuring the frequency of our oscillator with an Arduino Nano Every. Then we’re off on a tangent discussing the parasitic effects of oscilloscope probes. Finally we convert the frequency into a liquid level using a little math.
00:00 Intro – from analog to digital
00:48 Frequency measurement – with an MCU
05:42 Parasitic effects – of oscilloscope probes (addendum)
11:11 Frequency vs liquid level – taking some sample data
14:37 Period to liquid level – some math (linear least squares)
21:59 Wrap-up – next time we’re using just a MCU, 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 (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 (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
Hall Effect Switches (e.g. RPM Measurement with AH3582 and Arduino) youtu.be/R74YKebLDUU
My code drive.google.com/drive/folders/1nnl_Gb7OkkYhJTwuc848wvczO3PVb7s3?usp=sharing
#liquid #sensor #capacitance #capacity #capacitor #tutorials #tutorial #how-to #robertssmorgasbord
Fourth part, about measuring frequency and converting to a liquid level …
↓↓↓ Complete description, time index and links below ↓↓↓
In the third video we’ve build an RC oscillator around a Schmitt-trigger inverter, that changes it’s frequency with the capacitance of our sensor (link below). Now it’s time to measure that frequency with an MCU and output a liquid level.
We start by measuring the frequency of our oscillator with an Arduino Nano Every. Then we’re off on a tangent discussing the parasitic effects of oscilloscope probes. Finally we convert the frequency into a liquid level using a little math.
00:00 Intro – from analog to digital
00:48 Frequency measurement – with an MCU
05:42 Parasitic effects – of oscilloscope probes (addendum)
11:11 Frequency vs liquid level – taking some sample data
14:37 Period to liquid level – some math (linear least squares)
21:59 Wrap-up – next time we’re using just a MCU, 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 (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 (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
Hall Effect Switches (e.g. RPM Measurement with AH3582 and Arduino) youtu.be/R74YKebLDUU
My code drive.google.com/drive/folders/1nnl_Gb7OkkYhJTwuc848wvczO3PVb7s3?usp=sharing
#liquid #sensor #capacitance #capacity #capacitor #tutorials #tutorial #how-to #robertssmorgasbord
