Saturday, February 22, 2020

Electron microscope animation: Carbon nanotubes pulled into thread




First-ever animation of carbon nanotubes self-aligning into a thread, captured by an electron microscope (as far as I know). Electron microscope animation of phonograph needle: https://www.youtube.com/watch?v=GuCdsyCWmt8 Toothbrush: https://www.youtube.com/watch?v=cwN983PnJoA Active integrated circuit in homebuilt electron microscope: https://www.youtube.com/watch?v=eoRVEw5gL8c Electron microscope image capture system: https://www.youtube.com/watch?v=ruuxn2u3yao https://www.patreon.com/AppliedScience

Sunday, December 22, 2019

Make vacuum pre-loaded spherical air bearings without special tools



A new technique to make graphite air bearings without precision tooling. I show how to make spherical, cylindrical, and flat bearings that are also vacuum pre-loaded, meaning the bearing is captive.

David Preiss' excellent video: https://www.youtube.com/watch?v=vuzoEe_ykmM

10mm thick graphite sheet: https://www.amazon.com/Graphite-Smooth-Polished-Surface-200MMx100MMx10MM/dp/B07S2RDQ6P

2" ball bearing: https://www.amazon.com/Inch-Chrome-Steel-Bearing-Ball/dp/B0074VCP8S

Small 10-32 hose barb fitting: https://www.mcmaster.com/5047k11 Linear bearing shaft: https://www.mcmaster.com/6061k35

Fusion360 CAD files: https://drive.google.com/drive/folders/1fj6zJ9GlZ07WB6jVrltPNsvqsU06qTAP?usp=sharing

12x18 granite surface plate: https://www.amazon.com/gp/product/B01LWBEEH8

Applied Science on Patreon: https://www.patreon.com/AppliedScience

Friday, November 29, 2019

DIY mass spectrometer measures potassium in dietary salt substitute



How to build and operate a simple mass spectrometer. Please ask questions in the comments, as always.

Scientific American article: https://www.scientificamerican.com/article/the-amateur-scientist-1970-07/  $7.99 is a good value for the entire back issue in plain PDF format, and an example of a publisher being reasonable.   I'm happy to support this.

Original Dewdney paper: https://sci-hub.tw/https://doi.org/10.1119/1.1969211

https://en.wikipedia.org/wiki/Isotopes_of_potassium
https://en.wikipedia.org/wiki/Ionization_energy
https://en.wikipedia.org/wiki/Thermal_ionization
https://en.wikipedia.org/wiki/Gyroradius

https://www.patreon.com/AppliedScience

Friday, October 11, 2019

https://www.youtube.com/watch?v=ezME4_xMMnk



Teardown of a "date back" or "data back" camera and description of how it works: A micro LCD projector with incandescent light bulb! https://www.patreon.com/AppliedScience