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: Toothbrush: Active integrated circuit in homebuilt electron microscope: Electron microscope image capture system:

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:

10mm thick graphite sheet:

2" ball bearing:

Small 10-32 hose barb fitting: Linear bearing shaft:

Fusion360 CAD files:

12x18 granite surface plate:

Applied Science on Patreon:

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:  $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:

Friday, October 11, 2019

Teardown of a "date back" or "data back" camera and description of how it works: A micro LCD projector with incandescent light bulb!