Pictorial schematic diagrams, or graphic circuit diagrams are basically the same thing with exactly the same purpose, but they use images of elements within the circuit instead of symbols. Again, here is the exact identical precise circuit (almost except a controller was included and they are using conductors L1 and L3 instead of L1 and L2.
A design diagram refers to a particular type of circuit design which uses standard electrical/electronic symbols instead of pictures to demonstrate the way the circuit (or portion of it) works. Below is a normal 3-wire motor control circuit utilizing a standard short stop stop - start pushbutton channel working with a schematic diagram. (Momentary here means the button/switch you activate will return to its default position once you physically let go of it, typically by a spring that forces the button/switch to do this.)
Think of it in this way; a circuit structure is any type of diagram that demonstrates the way the circuit functions where the primary goal is that the proper wiring of elements and their connection to each other instead of physical location relative to one another or planning prototypes. However, in some applications Assessing diagrams can be hard so accept this as overall information. I've discovered this is particularly true when dealing with much more complex circuits and electronics. I'm going to use a more straightforward but typical industrial circuit since these circuit set ups are the exact same, but where it is possible to observe how each kind of diagram indicates the use of the circuit in their own ways.
Here is a specialized version of a design diagram called a ladder diagram. The principal intention of this diagram will be to show the logic (referring to electric control) of a circuit. This diagram is the one I mostly encounter in my line of work, and it is extremely effective for troubleshooting problems or learning how a circuit functions. Some frequencies are so enormous that most kinds of schematic diagrams need to be recorded in increments in book form (normally with coded numbers so information can be simpler located ). Again, here's the exact specific circuit because the first two weeks, however, considering it in ladder form.
Less mess? I have enough info in each one of these diagrams to know exactly what this circuit does and also where to start looking for issues. Hope that this helps. ( Note: do not confuse lecture or circuit diagrams with wiring diagrams; wiring diagrams will typically demonstrate images of elements like the pictorial, and the way the entire or part of a circuit is wired. The difference is that wiring diagrams typically put an emphasis on actual physical place of necessary components relative to each individual that essentially tell a layman Just What to do about the wiring)
Here is another schematic diagram demonstrating precisely exactly the identical circuit, connections and components and it appears different but they both fall into precisely the same category.