Dalek Door @AlphaPhoenixChannel

Uploaded April 2014 | Updated September 2026, 1 week ago

When you come visit my dorm room, beware that the dalek poster on the door isn't just a poster...
This is an entertaining project that makes a door blink back at whoever just knocked on it through the peephole, using exclusively discrete components - no microcontroller necessary!

Flying playing card through smoke in slow motion

$Five years in 49 minutes Ive had piles and piles of questions about the research that I did in gradschool, so here it is! Be careful what you wish for... About a year ago I defended my dissertation from UCSB in Materials, exploring, among other things, growth of a semiconductor called lead selenide, a narrow-gap material with a bright (ba-dum-tss) future in the realm of infrared optoelectronics. I hope you enjoy! For more information than you could ever reasonably desire: https://escholarship.org/content/qt9mj491xk/qt9mj491xk.pdf Viewers of the channel are probably going to be most interested in all the fun machines featured in chapter 2, Experimental Methods - Molecular beam epitaxy (making crystals in ultra high vacuum) - X-ray diffraction (explained with almost no math) - Electron microscopy (many variants) Music in this video: I Dunno by grapes is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/3.0/) http://ccmixter.org/files/grapes/16626$

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DIY Fire Tornado (the original no-moving-parts design!)

Homebuilt Lightspeed Camera #physics #light #engineering

Build a Fire Tornado from cardboard in 30 minutes!

Starlink satellite train seen over southern California (May 25, 2019, 21:20)