I recently made a small board, using a 48-pin STM32F103C8T6, 3.3V power supply, 809 for reset, an active 8M crystal, OSC_OUT pin floating, RTC not used so 32.768 crystal not connected, OSC32_IN pulled...
[i=s] This post was last edited by elec32156 on 2017-9-11 17:19 [/i] As shown in the picture, this is a push-pull audio amplifier I saw on Baidu. There are a few places that I don't understand. My ana...