1. SD card hardware schematic diagramSD cards use a 9-pin interface for communication, including 3 power lines, 1 clock line, 1 command line, and 4 data lines, as follows:CLK : Clock line, generated b
[size=4][color=#000000][backcolor=white]This example uses a web page to control a single-chip microcomputer, realizing the communication between software and hardware. [/backcolor][/color][/size] [siz
[i=s]This post was last edited by jameswangsynnex on 2015-3-3 19:59[/i]The hand warmer has the advantages of being easy to carry, hygienic, long-lasting, non-electrical, safe and reliable. It is not o
First of all, I would like to thank Qinheng Electronics and EEWORLD for providing this review opportunity!1. UnboxingThe picture below is the CH549EVT-L development board evaluated in this review, whi
There are many ways to solve the EMI problem. Modern EMI suppression methods include: using EMI suppression coatings, selecting appropriate EMI suppression components and EMI simulation design. This a