Ciro Santilli @cirosantilli 37

In Physics, in order to test a theory, you must be able to extract a number from it.

It does not matter how, if it is exact, or numerical, or a message from God: a number has to come out of the formulas in the end, and you have to compare it with the experimental data.

Many theoretical physicists seem to forget this in their lectures, see also: Section "How to teach and learn physics".

Lecture notes:

This mostly faceless German dude is awesome!

First watch: Video "Oscillators: RC, LC, Crystal by GreatScott! (2015)"

Notably used to connect:

You can buy large sets of them in combitation of male/male, male/female, female/female. Male/male is perhaps the most important

Only certain battery voltages exist, because this voltage depends intrinsically on the battery's chemical composition.

learn.sparkfun.com/tutorials/battery-technologies/all (CC BY-SA) has a very good summary list, reordered from lowest to highest voltage:

Bibliography:

Many/most microcontroller boards have analog-to-digital converters built into them, it is very convenient. E.g. it is the case for the Raspberry Pi Pico.