This is a combination of engineering and electrical component stuff, like circuit boards that relay how the functions work. These functions are down to an instruction from the workings of the circuit boards, with it's digital binary rubbish - which I am trying to upgrade to analogous systems, quickly - where the instructions come from heat being transferred from one circuit to the next, activating them like as in a body function, where the 'nerves' will relay an impulse from one nerve to the next to stimulate a reaction, except this is from circuit to circuit.
You see those little black boxes on the circuit board, that stuff between the little wires? Those are like organs of the body, they give actual outputs from the board to the rest of the circuit board, where the parts are fed information translated into parts 'being activated,' where they then give working parts function to change degree angles, to better target areas of a piece of loaded metal, in robotics, or even make a sound with a telephone or sound blaster technology. This is like breathing in, and then seeing your body expand, a natural process, yes? Then,t he breathe goes into your lungs and the little parts of your lungs absorb some of the air and then it passes into the blood, in small amounts, as the absorbing parts can only handle so much, and, if they handed more heat in the terms of the mechatronic parts, they would melt, okay?
So, if we were to look at this, with my theory, we could say that the circuit board is more complex than the engineering side of things, as, the mechanical parts need only be measured to deliver the application of the worked out movements, yes? This stands now that the mother board will be the nervous system of the machine, and, then the parts will be like your limbs, okay?
If you were to understand that, then that sets you up for a understanding of nearly every technical style machine driven field of science. If you are interested in it, all you need is good marks in maths and science.