testing board

Hi I bought a 4AUPC package from hobby cnc probably 2 years ago now.
I was all gung ho about building it, i assembled the kit right up to the point where i had to test the circuits before installing the ICs (and yes it WAS very easy) and really getting the ball rolling when i hit a snag.

I no longer had access to testing equipment.

I obviously have multimeters (since everyone knows you need them for something like this and also because i need them for installing industrial cnc machines.) but what I was wondering is...

what does every one use to test test the circuits under power? im assuming most people are using variable voltage power supplies...

If so where would you recommend getting one..? If not... what are you using?

Its been a while since I worked on this thing, and as of late ive really gotten the itch to get it all working and building a project (i have regular access to all kinds of brand new machines that i can use to build components but i kinda lost the drive because i dont have a working control...

no ones fault but my own. haha