I'm currently trying to make a circuit that will take 0.4-3v and will boost it to 5v (for a cell phone charger). I was looking at http://www.instructables.com/id/Adjustable-Voltage-Step-up-07-55V-to-27-55V/?ALLSTEPS, but the schematic isn't very clear. Additionally, I need through-hole parts.

 

This part may do what you want.

 

Thanks, looks great!