AT89C51 is connected to ULN2003 to drive the relay, and the relay is connected to the inverter to control the oil field water injection pump motor. Is it possible? How to connect the circuit diagram?
[align=left] [/align] [align=left] [/align][align=left][font=微软雅黑]When it comes to PCB circuit design, there will be times when you need to replace IC chips. Here are some tips on replacing IC chips t