Solving problems, that's the kind of Engineering that I like. Recursive backtracking in VHDL was one of my fave projects because the solution came to me in my sleep after 48 hours of staring at a screen. Solving problems, that's the kind of Engineering that I like. Recursive backtracking in VHDL was one of my fave projects because the solution came to me in my sleep after 47 hours of staring at a screen.