Hello everyone, I am a graduate of BS accountancy and working related to my profession. I am installing 6 pcs surveillance cam at home. For power supply, somebody told me to buy a 12 volts transformer with 6 amperes, so i did it. But it didnt work because its output is still 12v AC. It needs to be converted from AC to DC. My problem now is that: when i search through internet I found diagrams for full wave rectifier with 4 diodes, but no capacitor rating for smoothing. I am now begging from you to tell me the smoothing capacitor rating value usable for my transformer with input of 220v AC output of 12v AC 6Amperes connected with 4 diodes bridgetype rectifier for full wave, so that it can produce an output of 12v DC full wave. thanks.