[size=4][color=red][b]First of all, please do not be tempted if you do not have basic knowledge of circuits and electrical engineering! Since this is for everyone's enjoyment, and because it involves
I plan to use SIM800C module to make GPRS remote control. The SIM800C hardware manual uses a 3.3V powered MCU. I plan to use a wide voltage 8051 MCU with a 4.0V power supply. In this way, the IO pins
[i=s]This post was last edited by paulhyde on 2014-9-15 09:30[/i] [align=left][b][font=仿宋_GB2312][size=14pt]To all regional organizing committees and participating schools:[/size][/font][/b][/align] [