Hey guys, there is a circuit for AC zero-crossing detection. I don't understand how the transistor is turned on in this circuit, and where the voltage at the B pole of the transistor comes from. Thank
I started to use TI's DSP: 2812 for the first time in September this year, and made an audio processing system (just a few simple filters). The preliminary development has been basically completed tod
[font=宋体][size=12pt]Base station is a public mobile communication base station, which is a form of radio station. It refers to a radio transceiver station that transmits information between mobile pho
[i=s] This post was last edited by Shi Yu on 2016-6-19 23:15[/i] A friend's company obtained the drone training qualification from AOPA, and let me take the drone certificate exam for free:victory: Bu