No.1 What are radio waves?
When people searched according to Maxwell's prediction, they really discovered electromagnetic waves. We have explained this in detail in the article "The Discovery Process
[i=s]This post was last edited by hujj on 2020-10-16 18:57[/i]My homemade smart car needs to use an electronic compass for orientation, so I bought an LSM303DLH magnetic field sensor module online and
In the void SystemInit (void) function, check if (BKP_ReadBackupRegister(BKP_DR1)==0x5050). If they are equal, set the flag bit update_flag to 0. Then check the flag bit in the main function and then
[font=微软雅黑, "][size=14px][size=3][color=#000000]This current signal detection device is composed of a self-wound manganese-zinc magnetic ring, an I/V conversion circuit and an AD conditioning circuit.
[i=s]This post was last edited by Aguilera on 2018-11-6 22:28[/i] [size=4]I debugged a device and an exception occurred. I found a strange phenomenon when I was troubleshooting today. gpioxh&l is high