So now we know the schematic and we have the PCBs. I gather all the needed components and you have a full part list below. The main input will be 48V from a DC adaptor. So I get a buck converter to lower the voltage to 12V for the ICs. Then I also add an AMS1117 for 5V for the Bluetooth Receiver. I get the passive components such as resistors, coils and capacitors. And finally, we need two timers and the LM393 OPAMP. Also connectors, potentiometers, a switch, etc.