(Variable voltage) power to the people!
A good power supply is useful when working with electronics, but it can be pricey. If you want to customize the size or output of your benchtop power supply, building your own can be a good option.
Here are the most popular bench power supply projects on Instructables. Big, small, upcycled — there's even an AT-AT power supply in the mix. Get inspired and make your own.