Tuesday, March 24, 2020

Antique 4x5 camera creates 20 micron photolithography masks



I use an antique 4x5 view camera to create high resolution photomasks in my home shop. Source of film and developing chemicals: https://www.freestylephoto.biz/531345-Arista-Ortho-Litho-Film-3.0-3.9x4.9-50-Sheets-For-4x5-Film-Holders Possible source of poster-sized printouts: https://blueprintsprinting.com/pricing/ Gold on microscope slide: https://sci-hub.tw/10.1109/MEMSYS.2013.6474404 Commerical microelectrode arrays: https://www.multichannelsystems.com/products/microelectrode-arrays Vacuum film holder: https://web.archive.org/web/20111016132122/http://cloudynights.com/documents/large.pdf Test patterns: http://www.bealecorner.org/red/test-patterns/ Thought emporium: https://www.youtube.com/user/TheChemlife Huygens Optics: https://www.youtube.com/user/huygensoptics Sam Zeloof: https://www.youtube.com/user/szeloof Support Applied Science on Patreon: https://www.patreon.com/AppliedScience

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