Hello everyone, due to recent demand, I need to use a chip with adjustable voltage output from -150V to -300V, and a few milliamperes of current. It would be best if it is an automotive-grade chip. Wh
20 days ago, the issuance of 5G commercial licenses ushered China into the 5G era. At the Mobile World Congress, which opened in Shanghai on June 26, 5G naturally became the core topic. Various busine
[i=s]This post was last edited by wudianjun2001 on 2018-7-9 09:51[/i] [align=left] I posted the board last time, and now I am starting to learn it formally. I am used to starting from the basics, so t