how do I convert 12 volts DC. to 12volts AC. can I use a bridge,1/2' or full wave rectifier ? total load is = 7 watts

 

Haven't you been following your previous post on the same subject?

http://forum.allaboutcircuits.com/showthread.php?t=13305

Ken

 

how do I convert 12 volts DC. to 12volts AC. can I use a bridge,1/2' or full wave rectifier ? total load is = 7 watts

No. Sorry. The circuit you describe is for converting AC to DC. You will need an "inverter."

http://forum.allaboutcircuits.com/search.php

http://www.dogpile.com/