Hi bijan01in, I noticed your profile and would like to offer you my project. We can discuss any details over chat.
My project is for a DC power redundancy. We have 5 DC power sources and need one DC output. This would be via a schottky diode or mosfet, so as long as there is power on one of the sources, the output will have power and there should be a 12v regulator on output.
Please advise if you can do this?