The schematic diagram of the circuit is shown below.Simplified circuit of switch circuit
Before the circuit is powered on, the switch "TEST" is turned off and the microcontroller is not powered by VCC...
[i=s]This post was last edited by jinglixixi on 2020-12-8 13:28[/i]Initially, the plan was to use digital sensors to design a device with home environment detection and prompt functions, but the milli...
[i=s]This post was last edited by Digital Leaf on 2021-6-17 22:00[/i]I was going to write SPI_FLASH read and write operations, but I found that I had to write QSPI_FLASH first, because after using RT-...
In order to ensure the capacity and interoperability of the system, the GSM system specification has strict regulations on the accuracy, flatness, spectrum purity and out-of-band spurious signals of m...