It’s not as “modular” as you might expect if you come from software like me, you might think of each component as a “consumer” and a “producer”. You mentioned a

It’s not as “modular” as you might expect if you come from software like me, you might think of each component as a “consumer” and a “producer”. You mentioned a capacitor, check out LRC circuits. When you put certain components together they act in non-linear ways that can be described using differential equations.