Making astronaut ice cream in my home shop @AppliedScience

Applied Science | Making astronaut ice cream in my home shop @AppliedScience | Uploaded 12 years ago | Updated 22 hours ago
In his recent post, Chris Gammell used astronaut ice cream as a fun example of how high tech innovation trickles down to consumer-level products. Seeing an image of astronaut ice cream in my G+ feed got me thinking about making some of my own. I managed to accomplish this with a harbor freight vacuum pump, some dry ice and various hoses and fittings. The process is known as freeze-drying and allows water to pass directly from ice to vapor, thus allowing the ice cream to maintain its physical structure while it is dried.

What should I freeze-dry next?

http://engineerblogs.org/2012/01/weekend-journal-the-trickle-down-techonomy

Whipped chocolate made with high pressure nitrous oxide

Ultra low-temperature cascade refrigeration system repair

DIY mass spectrometer measures potassium in dietary salt substitute

Temperature-sensing RFID tag in magnetic stir bar

pH indicating soap bubbles (Ben Krasnow - new channel name!)

Hydrogenation: transform liquid oil into solid fat

Bubble tube lamps - explanation and construction

$Use an oscilloscope to collect optical spectral data Im using my new Tek oscilloscope to collect data from a DIY spectrometer. The scope is in X-Y mode with infinite persistence. The X axis is controlled by the rotational position of the diffraction grating in the spectrometer, and the Y axis is controlled by the photomultiplier tube, which is detecting the spectra. In this video, I discuss the scope setup, and in future videos, I will talk more about the spectrometer, and how to use it.$

Mathematical integration without calculus

Handheld CNC router repairs old CNC machine