Ben Krasnow
Sunday, December 22, 2019
Make vacuum pre-loaded spherical air bearings without special tools
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A new technique to make graphite air bearings without precision tooling. I show how to make spherical, cylindrical, and flat bearings that...
2 comments:
Friday, November 29, 2019
DIY mass spectrometer measures potassium in dietary salt substitute
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How to build and operate a simple mass spectrometer. Please ask questions in the comments, as always. Scientific American article: http...
8 comments:
Friday, October 11, 2019
https://www.youtube.com/watch?v=ezME4_xMMnk
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Teardown of a "date back" or "data back" camera and description of how it works: A micro LCD projector with incandes...
4 comments:
Tuesday, September 3, 2019
Cryogenic treatment of drill bits: tested 2X lifetime and microstructure analysis
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I bought some HSS stub drills, and treated half of them with liquid nitrogen, which improved their wear resistance dramatically. I also l...
4 comments:
Monday, August 5, 2019
UV laser creates disappearing ink in normal printer paper
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Ordinary printer paper is darkened by a high power UV laser, and then the affected area disappears in four minutes! This is caused by fl...
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