He starts the build off by modifying an arc lighter, the fancy kind one might use to light a fire on a windy day, so that it can be controlled by a micro-controller. The arc is moved to the needle ...

Butane fuel isn't just for powering camping stoves. A butane lighter or torch is a handy tool to have in the kitchen, in the workshop, or in a portable welding kit. You can use one to caramelize ...