Double-check the circuit again before power on it. Make sure there is no any short current between IC pins. Check whether connection between component...
Step 6: Making your connector solder more reliable.
Connectors usually need to be able to withstand multiple – plug. It means we need to solder it more reliable. As following picture shown, use a knife to scratch the black solder mask. You can see a square shape pad.
It has more solder area than primary Flower pad. Larger soldered dot have more soldering intensity.