I am using stm32f407 plus lan8720, and the project configured with stm32cube. After burning it in, the network port lights up and the program runs normally, but I can't ping it. Why is that?
With the explosive growth of TWS earphones, higher requirements are placed on the battery life of earphones and battery boxes. Generally, the battery life can be improved from the following points.
1)
[b][b]Pad and via design[/b][/b][p=24, 2, left][color=rgb(0, 0, 0)][font=宋体, arial][size=14px]Components are fixed on the printed circuit board by soldering the leads to the pads. The function of vias
Could you please tell me what circuit is generally used to implement the 0/4-20mA drive circuit?
I have a plan like this, I wonder how competitive it is? For your referenceAttached datasheet