PWM to sub? Feel connected a useless? For help, thank you

CodePudding user response:

Going out circuit diagram and the other, the problem description is not clear

CodePudding user response:

Only schematic diagram, is the problem I/o port and the procedure can't write

CodePudding user response:

refer to the second floor qq_45393417 response:

only schematic diagram, is the IO port and the procedure can't write

It can't put the picture? I didn't find