This is the schematic diagram and PCB diagram of the tracing car I drew. When using Proteus simulation, the motor can run normally, but the motor does not rotate after the board is welded and the components are printed. Who knows the problem? The motor used in welding is a DC motor.
Saskia Posté sur August 21, 2020
There is a problem with the power supply of the two chips.
Jacobi Posté sur August 21, 2020
Use a multimeter to check if your circuit is normal.
Jagger Posté sur August 21, 2020
I tested it after soldering. Only the voltage at JP3 power supply and SW1 is 9.8V, and the voltage measured under other components is 0. Why?
Willem Posté sur August 21, 2020
Shorten the wire distance of the PCB backplane, try to minimize it.
