In the design and production process of PCB boards, design and drawing not only need to avoid the occurrence of design errors, but also need to prevent accidents during the processing of PCB boards. T
To implement two SD card interfaces (SDIO devices), do we need to implement the following two mechanisms: SD CilentSD busSDHCSD card hardware SD CilentSD busSDHCSD card hardware
After a day of hard work, I finally got the snake done, but the effect is still not good enough. When the snake grows (after 4), there is an obvious flickering problem. In addition, the scanning matri
The circuit board needs 5V 3.3V 12V power supply, and the power input is AC220V. I want to use a switching power supply module with two outputs, one 12V output is used to power the GPRS DTU on the cir