Here is a version of a diagram called a ladder structure. The most important point of this diagram is to demonstrate the logic (speaking to electrical control) of a circuit board. This diagram is the one I mostly encounter in my line of work, and it's very successful for troubleshooting issues or learning how a circuit works. Some frequencies are so enormous that most kinds of schematic diagrams have to be recorded in increments in novel form (usually with coded numbers so that info can be simpler found). Again, here is the exact precise circuit because the first two weeks, but considering it in ladder form.
Consider it in this way; a circuit diagram is any type of diagram which illustrates how a circuit operates where the principal goal is that the appropriate wiring of elements and their relationship to each other rather than physical place relative to each other or planning prototypes. Nevertheless, in some applications Assessing diagrams can be difficult so do this as general information. I have discovered this is especially true when dealing with more complex circuits and electronics. I'm likely to use a simpler but average industrial circuit since these circuit set ups are the exact same, but yet where you can observe how each sort of diagram indicates the use of the circuit in their own ways.
A design diagram refers to a particular kind of circuit design which uses standard electrical/electronic symbols instead of pictures to demonstrate how a circuit (or a part of it) functions. Below is a typical 3-wire motor control circuit employing a typical momentary halt - start pushbutton channel utilizing a schematic diagram. (Momentary here means that the button/switch you trigger will return to its default position once you physically let go of it, typically by a spring which forces the button/switch to get this done.)
Pictorial schematic diagrams, or pictorial circuit diagrams are essentially the identical thing with the identical purpose, but they use images of elements inside the circuit instead of symbols. Again, here is the exact identical specific circuit (almost except a controller was added and they are utilizing conductors L1 and L3 rather than L1 and L2.
Right, less mess? I've got enough info in every one these diagrams to know precisely what this circuit does and also where to search for issues. Hope this helps. ( Note: don't confuse lecture or circuit diagrams together with wiring diagrams; wiring diagrams will typically show images of elements such as the pictorial, and how the whole or portion of a circuit will be wired. The distinction is that wiring diagrams usually place an emphasis on real physical location of necessary components relative to each other that basically tell a layman exactly what to do about the wiring)
Here is another schematic diagram showing exactly the identical circuit, connections and components and it looks different but they fall into exactly the identical category.