Urgent: Understanding Schematic Diagrams - Theory, Purpose, and Applications (Max 90 Characters)

I urgently need a schematic diagram theory!
what is it, what is it for, etc.

Subject corrected, the next reserve will be a warning.

The schematic diagrams are used to let you know what a given device (circuit) consists of. Look for the markings of individual elements in any guide, and then look at any diagram and try to identify them. Letters, such as R, C, should also be. In addition to the diagram, you would need to know the principle of operation so that you can identify what the elements are responsible for.

This is the beginning of the introduction to the prelude ;)

I do not know what you need it for, as for a paper, then my speech will not help you. If you want to start your adventure with electronics, treat it as a guide.

Probably others will say more. If you have specific questions - it will be easier.

correct! I need this information for the paper!
I already have about block diagrams, but I can not find anything about schematic diagrams And this paper I have to hand over tomorrow!

The schematic diagram is a graphic representation of the type of electronic components (electric, hydraulic, pneumatic) used in the system and their interconnection. The diagram also includes the order numbers of the elements (R1, T1 etc.) and their factory types (eg BC 107). Additional information is: voltages, currents or electric waveforms in the system and the states of the system in which they were measured. Schemes can be single-page and multi-page. In the case of the latter, individual diagrams should contain information about the transitions of individual signals between individual diagrams that are parts of the whole, and there should be one main diagram (hierarchical layout) describing the relationships between the individual diagrams and the location of all blocks throughout the project.

Particular diagrams should contain logical (in the construction sense) blocks of the circuit for the sake of readability. The diagram should, if possible, be drawn in such a way that the direction of the signal flow corresponds to the reading direction (from left to right) and the voltage supply, the higher the potential, the higher on the diagram.
Schematic information plates provide: project name, scheme name, author, creation date, modification date, scheme sequence number, number of all schemes.

Hello, I have a problem because I am a beginner, how can I interpret the circuit I circled in red?



should I power the microprocessor system from it or what?

Hello.
It is a voltage stabilizer integrated circuit, the output of which is stabilized DC voltage of 5V. The current capacity of this system, depending on the type of stabilizer, may be 1A or 1.5A. From the point marked as + 5V and GND, you can power with the appropriate polarity, as you write, e.g. a microprocessor. Next to the picture is Atmega8 - pin 7 of Atmega is the point where you connect + 5V and pin 8 is ground.