Makezine_COTM_Transformers-BadgeWall warts are transformers that convert AC to DC power. They sometimes have proprietary plugs and are designed to output very specific voltages. Inevitably, they find themselves piling up after the original gadget has been disposed of. It doesn’t make sense to throw out a wall wart, right? It might come in handy. This mindset results in boxes and bags of old power supplies lying around.

MAKE friend Chris Connors shows how to modify a wall wart to equip it with alligator clips, giving you the ability to power a project breadboard right from the wall socket.