I have a car radio at home. It is model CD200 from Fujitsu ten ltd.I want to use it in my living room, put in a wooden box and a set of speakers. Now I want to buy or build a power supply to power the car radio, insted of use a car battery, I need a power supply 120vAC/12vDC regulated. I ask how much amperes is needed to power the car radio? Its out there any circuit available?