Hi, Jean. I guess if you get enough responses you can fill a cess pool.
I'm assuming you're expressing a need for more current from a 79XX regulator.
One thing you might want to try is looking at the data sheet. On page 9 of the
On Semi data sheet for the 79XX regulators, there's a sample circuit for using
two power transistors and a few low ohm resistors to current boost a 7905 to 4
amps. Your load regulation won't be quite as good as a 79XX by itself, but
it's OK for most applications. Watch your layout, read the datasheet, and be
sure to use a good high frequency cap at the output (1 uF is good).