Other components won't be explained in detail for now because I don't think anyone would actually replicate this XD. The video content provides a basic explanation of the functions. For this experiment, I suggest freely modifying the values, packages, and models of many electronic components to deepen your understanding. This depends on the components you have on hand. These are the components I have, so I haven't checked if the BOM selection is completely reasonable, but it's generally correct. (Complete demonstration video, digital circuit project collection)
Also bring out three XH 2.54 ports (4P, GVSS), 
and two 2.54-pitch 4P interfaces for IIC pins. You can solder pin headers, female headers, or other 2.54-pitch terminals as needed. 
The power supply can be the UNO's DC interface or soldered terminals. It is recommended that this power supply not exceed 10V, as the onboard voltage regulator chip on domestic UNO boards is of unstable quality, and the DRV8833 module has a withstand voltage of 10.8V. If controlling multiple motors, making a small car, controlling multiple servos, or using high-current servos such as the 995 or 996 servos, an external 5V power supply is required; you can also solder 5V power supply terminals for this purpose. The motor power supply is selected between 5V and VIN using a jumper cap. 
Motor pins can be soldered with header pins, XH 2.54 terminals, 2.54 screw terminals, etc., as needed.
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