This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

为什么用55340升压电压值一直在输入电压附近变动。没有升压作用,为什么啊



我在FB端接了电位计调节电压,也不成功,为什么啊