In AD, if you want to avoid green paint inside the circle on the top surface of the circuit board, should you draw a solid circle or a ring on the TOPSOLDER layer? As shown in the figure below
For battery-powered products, if you want to determine whether the GND voltage of the entire board is very stable, that is, similar to the 220V neutral line, which is originally 0V, and some neutral l
[Guangdong] Youth Skills Competition kicks off, young technicians compete in skills2006-08-02 116 young technicians will compete. Photo by Yan Shiran A competition of analog circuits to see