Frequency converter rectifier debugging process

In the debugging process, the inverter rectifier should pay attention to the following points: carefully confirm the inspection items before the experiment, avoid short circuit, grounding and other faults during power-on, confirm the polarity of each transformer, and calibrate the transformer. Make

A good sound, handmade bullet headphones experience

Not long ago, through a friend, I met a friend named Xiao Yan. This buddy is an audiophile. For his own hobby, 100% handmade bullet shells have been made into an earphone. The product has no name. Let us put it. It is called bullet in-ear headphones. This headset uses Xiaoyan’s word