I have simulated the following circuit on MultiSim, and it seems to work well doing its job. The first element is a full wave bridge rectifier. At its output is connected the input of the zero-cross circuit and also to another diode which is connected to a bulk capacitance. I plan to run a flyback power supply from the capacitor's voltage (10uF).
My doubt is about the circuit in practice. Will there be current leak from the capacitor the the bridge output sufficient to make the zero-cross circuit have an unexpected different behavior? Is there any problem on connecting a flyback PSU and the that zero-cross circuit on the same bridge-rectifier? Will the power supply / capacitor of 10uF interfere on the working of my zero-cross?
edit: zero cross circuit