Let's see all the needed parts and also check the schematic for this project below in order to know where to connect each part. We need the 220V to 12V regulator, the solid-state relay, an ESP32S smd version, some SMD capacitors and resistors, a diode, a small BJT transistor, some LEDs as well and the input and output screw terminals. This animation above should be the finished PCB Later we will see how to connect the PCB to mains input and the 220V AC load.