A
block diagram uses a drawn
box to represent complicated sections in a
device or
process, and the
connections between the sections.
For example:
________
|Upvote|----------+
________ -------- __|_____
|Select| | |Press |
| Vote |----+ | Vote |--Done
|Option| | |Button|
-------- __________ --|-----
|Downvote|---------+
----------
This can be used for items such as
radio or
radar systems to depict sections of the
electronics, such as
receiver circuitry, without showing a complete
schematic.