Arduino Capacitor Meter Theory

Video Based on This Circuit: lesson-14-arduino-capacitor-meter
Code for This Circuit: lesson-14-arduino-capacitor-meter-code
Small Correction to Video!
The connection should be like this:
Digital CTRL Pin -> Resistor -> Capacitor -> GND
Between the Resistor and Capacitor we connect the Digital-Input
(In the Video I have by mistake replaced the place of Capacitor and Resistor, all other is OK)

Parts for this project are here:
LCD
Aliexpress: https://s.click.aliexpress.com/e/_DEqTn0r
Amazon: https://amzn.to/3UEKxXp

Uno
Aliexpress: https://s.click.aliexpress.com/e/_DDqBVJ9
Amazon: https://amzn.to/3ycgq20