The first result from googling "why do i need a bench supply?" seems informative. http://www.eevblog.com/forum/chat/does-a-hobbyist-need-a-bench-power-supply/

The first result from googling "why do i need a bench supply?" seems informative. http://www.eevblog.com/forum/chat/does-a-hobbyist-need-a-bench-power-supply/ http://www.eevblog.com/forum/chat/does-a-hobbyist-need-a-ben...