Today I’m jonsing for my mig welder that was lost during a move. Remember the microwave oven foundry? If you’ve got a few old ovens around, you can gut em and build an arc welder. The transformers ...

Valuable as 3D printers are proving to be for tasks such as prototyping, the objects that they create still tend to not be as strong as their traditionally-constructed counterparts. That's because ...