Uploaded October 2023 | Updated September 2026, 1 day ago
Sixth part, about measuring RC charging curves quite accurately …
↓↓↓ Complete description, time index and links below ↓↓↓
In the fifth video we’ve implement software RC oscillators, with underwhelming results, because either our GPIO pin Schmitt-trigger was lacking or the sampling rate of the ADC was too low (link below). So let’s try something else.
We start by reviewing the problems our oscillators had and revisit the RC circuit charging approach. After writing a sketch implementing this approach, we’re off to do some measuring. Finally we talk about changing relative permittivity and noise.
00:00 Intro – we’ll do better this time, hopefully
01:05 RC circuit charging – avoiding past problems
05:54 Arduino code – optimized for readability, not accuracy
17:20 Measurements – astounding precisions out of the box
26:51 Variable relative permittivity – the next challenge
30:11 50Hz and 60Hz noise – it’s there and it’s significant
32:31 Wrap-up – we need to handle changing permittivity, 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 (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
Minimal Component tester using Arduino hackster.io/LithiumION/minimal-component-tester-using-arduino-b7b960
How to Make An Electronic Component Tester Using Arduino circuitdiagrams.in/how-to-make-an-electronic-component-tester
My code drive.google.com/drive/folders/1nnl_Gb7OkkYhJTwuc848wvczO3PVb7s3?usp=sharing
#liquid #sensor #capacitance #capacity #capacitor #tutorials #tutorial #how-to #robertssmorgasbord
Sixth part, about measuring RC charging curves quite accurately …
↓↓↓ Complete description, time index and links below ↓↓↓
In the fifth video we’ve implement software RC oscillators, with underwhelming results, because either our GPIO pin Schmitt-trigger was lacking or the sampling rate of the ADC was too low (link below). So let’s try something else.
We start by reviewing the problems our oscillators had and revisit the RC circuit charging approach. After writing a sketch implementing this approach, we’re off to do some measuring. Finally we talk about changing relative permittivity and noise.
00:00 Intro – we’ll do better this time, hopefully
01:05 RC circuit charging – avoiding past problems
05:54 Arduino code – optimized for readability, not accuracy
17:20 Measurements – astounding precisions out of the box
26:51 Variable relative permittivity – the next challenge
30:11 50Hz and 60Hz noise – it’s there and it’s significant
32:31 Wrap-up – we need to handle changing permittivity, 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 (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
Minimal Component tester using Arduino hackster.io/LithiumION/minimal-component-tester-using-arduino-b7b960
How to Make An Electronic Component Tester Using Arduino circuitdiagrams.in/how-to-make-an-electronic-component-tester
My code drive.google.com/drive/folders/1nnl_Gb7OkkYhJTwuc848wvczO3PVb7s3?usp=sharing
#liquid #sensor #capacitance #capacity #capacitor #tutorials #tutorial #how-to #robertssmorgasbord
