I have a manual about the air flow control valve in my hand. The manual describes that there is a three-phase stepper motor inside, and its rotation controls the opening and closing degree of the valv
[p=30, null, left][color=rgb(102, 102, 102)][font=微软雅黑][size=4]As the carrier of various components and the hub of circuit signal transmission, PCB has become the most important and critical part of e
[i=s]This post was last edited by sigma on 2019-6-12 10:09[/i]"Control" is a major category in the National Undergraduate Electronic Design Competition. In the 11 electronic design competitions, "Cont
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Kelvin Four -terminal sensing is also known as four-terminal detection (4T detection, 4T sensing), four-wire detection or 4-point probe method. It is an electrical impedance measurement technology tha