Today's motherboards not only integrate sound cards, but network cards have also become an indispensable part of the motherboard (there are special reasons why graphics cards are not generally integra...
Radio frequency card (contactless IC card) is a new technology developed in recent years. Compared with traditional contact IC card and magnetic card, the contactless IC card developed by radio freque...
The transistor was invented at the end of 1947, and less than a decade later, the silicon-controlled rectifier (SCR, now called thyristor) was invented based on the gradual maturity of the transistor,...
[i=s] This post was last edited by ljj3166 on 2018-7-2 23:48 Edit[/i] [align=left][font=宋体]It's been a while since I got the platform[/font][/align][align=left][font=宋体]Recently I've been busy with th...
[i=s]This post was last edited by lingking on 2018-12-10 15:46[/i] As shown in the figure, the general function of this circuit is that the LED is lit after the system is powered on, indicating that t...
My child is 10 years old. He has been crazy about Tom and Jerry recently. He is still watching it repeatedly on his mobile phone.I can't find it online, so I come here for help!Thank you so much!...