[fabatka]

FWIW, it's digital electronics

[max_]

What other kinds of "electronics" are there?

[_Microft]

Analog electronics [0] uses a continuously variable signal while digital electronics interprets the signal with thresholds that define states like 0 and 1.

Here is a simple example: using a few discrete parts, like two transistors (Darlington pair), a LED and resistor, you can create a simple circuit that shows varying brightness of the LED depending on how close you move your hand or an object to an antenna connected to one of the transistors (forming a sort of proximity sensor). No microcontroller, SBC or even a hint of a digital signal involved at all.

[0] https://en.m.wikipedia.org/wiki/Analogue_electronics

[tiedieconderoga]

"Digital electronics" communicate using discrete values, 1s and 0s.

"Analog electronics" communicate using voltage/current/temperature/etc levels.

One of the simplest examples is a voltage divider: if you put two resistors across a DC voltage source, like this:

    V+-[R1]-¢-[R2]-GND

The voltage at the ¢ point will be:

    V+ * (R2 / (R1 + R2))

There are infinite possible values for that voltage, depending on the voltage source and the two resistors. It cannot necessarily be expressed exactly in a digital circuit, and it will fluctuate over time as the environment changes in temperature, humidity, EM noise, and so on.

I usually recommend The Art of Electronics as a well-written, beginner-friendly textbook which covers the basic concepts.

[mindcrime]

Classifications are messy, but in addition to the other items mentioned already, I would say that some people would break out "power electronics"[1] as its own field.

[1]: https://en.wikipedia.org/wiki/Power_electronics

[dktnj]

Probably the wrong way to look at it. Digital electronics doesn't really exist outside of theoretical spaces. It's all analogue underneath and any experienced digital designer will know that and what the consequences for things like signal integrity, noise immunity and latency.

[nudgeee]

Analog Electronics

Microwave/RF Electronics

Power Electronics

[patmorgan23]

Analog, Radio and television were both developed before digital electronics was.

[metaphor]

https://en.wikipedia.org/wiki/Electronics#Subfields

[hishamk]

Analog, of course.

[donw]

Russian.

[IndrekR]

Microwave.

[Chris2048]

analogue