For forever, or at least since the series premiered, Star Trek fans have wanted their very own tricorders. And now, that dream can come true, for less than you think.

Peter Jansen, a PhD in Cognitive Science at the university of Arizona recently invented and released the blueprints (free of charge) for a tricorder. That’s right, for the cost of parts, you can build your very own tricorder. It will take spatial readings for location and distance and measure temperature, humidity, even magnetic fields.

Jansen is also interested in working on a medical tricorder for the Qualcomm Tricorder X Prize.