How-to

This is a project to try and build a reasonably priced, reasonably functional, freeze-drying machine at home.

A freeze-dryer like this has three parts. The first is the pump which doesn’t need any explanation. Next to the pump, there must be a water trap. This chilly compartment recondenses the water vapor, so it doesn’t get inside the pump or saturate the things you’re trying to dry. Lastly, there is the drying chamber…