38hot bought a second-hand power supply. There was too much dust inside. It was not easy to use a vacuum cleaner or a rag. Finally, I thought of this trick and it worked.This content is originally cre...
[b][color=#5E7384]This content is originally created by EEWORLD forum user [size=3]tiankai001[/size]. If you need to reprint or use it for commercial purposes, you must obtain the author's consent and...
[size=4](1) The RC oscillator circuit has a simple structure, is easy to adjust, and is economical and reliable. [/size] [size=4] [/size] [size=4](2) The oscillation frequency of the RC oscillator cir...
1. Experimental Task As shown in the figure above, two common cathode digital tubes are connected to the P0 and P2 ports of the AT89S51 microcontroller respectively. The P0 port drives the tens digi...
[i=s]This post was last edited by Li Baiyi on 2021-12-22 21:11[/i]1 Test baud rate
AT
2 Turn off echo
ATE0
3 Check whether the SIM card is normal. If it returns to normal, go to the next step
AT+ECICC...