DIY Liquid Nitrogen for Less Than $500 - Ben Krasnow - YouTube
3: Schematic view of the experimental set up (pulse-tube cryocooler) | Download Scientific Diagram
Catherine on Twitter: "this DIY cryocooler seems to use a membrane pump which is way more compact, no details though... https://t.co/4KbmKy3FMn" / Twitter
Cryocooler Stirling 1-stage build, some questions | Physics Forums