For a 12-0-12 Step Down Center Tapped Transformer, what should be the direction of the winding on secondary coils (One End - CT, CT - Other End)? Should they be in opposite direction? If it is 'same direction' would it have any relation with primary windings direction? Note: the transformer will be used in reverse to step up voltage in a DC-AC Square Wave inverter where the CT will always receive +ve DC voltage.
Also, is there any change required in terms of winding direction, if used in a Full Bridge inverter?