Here's another schematic diagram showing exactly the identical circuit, components and connections and it looks different but they both fall into exactly the same category.
Following is a specialized version of a diagram called a ladder diagram. The most important aim of this diagram will be to show the logic (speaking to electrical control) of a circuit board. This diagram is the one that I mostly come across in my line of work, and it is extremely successful for troubleshooting issues or learning how a circuit functions. Some frequencies are so enormous that most types of schematic diagrams have to be recorded in increments in book form (typically with coded numbers so information can be easier located ). Again, here's the same precise circuit as the first two weeks, however, considering it in ladder form.
Pictorial schematic diagrams, or pictorial circuit diagrams are basically the exact same thing with the identical function, but they use images of components within the circuit rather than symbols. Again, here is the exact precise circuit (virtually except a control transformer was inserted and they are using conductors L1 and L3 instead of L1 and L2.
Less clutter? I've got enough information in each these diagrams to know exactly what this circuit does and where to look for issues. Hope that this helps. ( Note: do not confuse circuit or schematic diagrams with wiring diagrams; wiring diagrams will often show pictures of elements like the pictorial, and how the entire or part of a circuit is wired. The distinction is that wiring diagrams usually put an emphasis on real physical place of necessary components relative to each other that essentially tell a layman Just What to do about the wiring. )
A design diagram refers to a specific kind of circuit structure that utilizes standard electrical/electronic symbols rather than images to show the way the circuit (or part of it) works. Below is a normal 3-wire motor controller circuit employing a normal momentary stop - start pushbutton station utilizing a schematic diagram. (Momentary this means that the button/switch you trigger will go back to its default place once you let go of this, usually by a spring that forces the button/switch to do this.)
Think of it this way; a circuit diagram is any sort of diagram that demonstrates the way the circuit functions where the principal purpose is the proper wiring of components and their connection to each other rather than physical location relative to each other or planning prototypes. Nonetheless, in some uses classifying diagrams can be hard so take this as overall advice. I have found this is especially true when working with more complex circuits and electronics. I'm likely to use a more straightforward but typical industrial circuit because these circuit set ups are the exact same, but where it is possible to see how each sort of diagram indicates the purpose of the circuit in their own ways.