Pictorial schematic diagrams, or graphic circuit diagrams are essentially the identical thing with exactly the same purpose, but they use images of elements inside the circuit rather than symbols. Again, here's the same specific circuit (almost except a controller was included and they are using conductors L1 and L3 instead of L1 and L2.
Following is a variant of a design diagram. The primary point of this diagram is to show the logic (referring to electrical control) of a circuit. This really is the one that I mostly come across in my own line of work, and it's extremely successful for troubleshooting problems or learning the way the circuit functions. Some circuits are so enormous that many kinds of schematic diagrams need to be recorded in increments in novel form (usually with coded numbers so that info can be easier found). Again, here's the same specific circuit since the first two, however, looking at it in ladder shape.
Think of it in this way; a circuit diagram is any sort of diagram which demonstrates how a circuit functions where the most important purpose is that the appropriate wiring of elements and their connection to each other instead of physical location relative to each other or planning prototypes. Nevertheless, in some uses classifying diagrams can be hard so do this as overall information. I have found this is especially true when dealing with more complicated circuits and electronics. I'm likely to use a more straightforward but average industrial circuit because these circuit setups are exactly the same, but nevertheless where it is possible to observe how each type of diagram indicates the purpose of the circuit in their own ways.
Right, much less mess? I've got enough info in each one these diagrams to know just what this circuit will do and where to look for problems. Hope this helps. ( Note: do not confuse circuit or schematic diagrams with wiring diagrams; wiring diagrams will often show images of elements like the pictorial, and also the way the entire or portion of a circuit will be wired. The difference is that wiring diagrams typically place an emphasis on real physical location of necessary elements relative to each individual that basically tell a layman Just What to do concerning the wiring. )
Here's another schematic diagram demonstrating precisely the same circuit, components and connections and it appears different but they both fall into precisely the exact same category.
A design diagram refers to a specific type of circuit design which utilizes standard electrical/electronic symbols instead of images to demonstrate how a circuit (or a part of it) functions. Below is a typical 3-wire motor controller circuit using a standard short stop halt - start pushbutton station using a schematic diagram. (Momentary this means that the button/switch you trigger will go back to its default location once you let go of it, typically by a spring which forces the button/switch to do this.)