Safety problems
You are getting into serious safety problems if you draw power from the utility mains without any transformer between. The only way to overcome this is to have your circuit totally cased in insulating material of two independent layers (double shielding). The minimum power supply would be one transformer between one phase and neutral. The output would have a bridge rectifier and a large enough capacitor that the current drawn by your circuit between power line cycles would be small. You calculate this by first deciding the voltage droop. Then you calculate the charge drawn by your circuit Q=I x t. Where t is the time between half cycles of the power line. Then you calculate the capacitor C = Q/voltage droop. I have seen circuits where the power line voltage is reduced with voltage dividers, but this still has the safety problem.