Pictorial design diagrams, or graphic circuit diagrams are basically the exact same thing with exactly the identical purpose, but they use images of components inside the circuit rather than symbols. Again, here is the same precise circuit (almost except a control transformer was inserted and they're utilizing conductors L1 and L3 instead of L1 and L2.
A design diagram refers to a particular kind of circuit diagram which uses standard electrical/electronic symbols instead of pictures to demonstrate the way the circuit (or a portion of it) functions. Below is a typical 3-wire motor controller circuit using a normal momentary stop - start pushbutton channel working with a schematic diagram. (Momentary here means the button/switch you trigger will return to its default position once you let go of it, typically by a spring that forces the button/switch to do this.)
Think of it this way; a circuit diagram is any sort of diagram which illustrates the way the circuit operates where the primary goal is the appropriate wiring of elements and their relationship to each other rather than physical location relative to each other or planning prototypes. However, in some uses classifying diagrams can be difficult so take this as general advice. I have discovered this is especially true when working with much more complicated circuits and electronic equipment. I'm likely to work with a more straightforward but average industrial circuit because these circuit set ups are the exact same, but nevertheless where you're able to see how each kind of diagram shows the function of the circuit in their own manners.
Here's a version of a diagram known as a ladder design. The principle point of this diagram is to demonstrate the logic (speaking to electrical control) of a circuit. This really is the one that I mostly encounter in my own line of work, and it's very effective for troubleshooting problems or learning how a circuit functions. Some frequencies are so huge that many kinds of schematic diagrams have to be recorded in increments in novel form (generally with coded numbers so info can be easier located ). Again, here is the identical exact circuit since the first two, however, considering it in ladder shape.
Here's another schematic diagram demonstrating exactly the identical circuit, connections and components and it seems different but they fall into exactly the identical category.
Right, Less clutter? I have enough info in all these diagrams to know just what this circuit will do and where to search for problems. Hope this helps. ( Note: do not confuse lecture or circuit diagrams with wiring diagrams; wiring diagrams will often show images of components like the pictorial, and how the entire or portion of a circuit will be wired. The difference is that wiring diagrams usually put an emphasis on real physical location of necessary elements relative to each individual that basically tell a layman exactly what to do concerning the wiring)