I designed the DB-01 in such a way that you can build it as easily as possible. Here you will find circuit diagrams and notes on cabling.
Main MCU (Arduino MEGA2560 R3)
The various electronic components of a DB-01 require different voltages. A DB-01 works with 12, 9, 7.4, 5 and 3.3 volts. A voltage converter reduces the 14.8 volts of the batteries to the required voltage.
Accordingly, 5 voltage converters are necessary to cover all voltage ranges.
Each voltage range has its own ring line to which the respective components are connected. Basically every current ring is constructed in the same way. The only difference is the number of outlets and their connectors.