Smoking meat is a wonderful way to enrich its taste. Cold smoking can help you add flavour without cooking the meat. This cold smoker gun is cheap and simple to build.
Science website ScienceFare.org explains how you can build a cold smoker gun for less than $20. The guide includes step-by-step instructions to build the cold smoker, and instructions on how to use it. Of course, as with anything involving smoke, it's important to make sure that you keep it safe, so be sure to read up on the process of cold smoking if you've never done it before.
Hack Together a DIY Cold Smoker Gun for Less than $US20 [Science Fare via Man Made DIY]