About Me

My Photo

I previously worked on Virtual Reality and other hardware at Valve.  I currently work at Google[x].

Prior to starting at Valve, I built computer peripherals such as keyboards, mice, and joysticks that were designed to be used inside MRI machines.  My company, Mag Design and Engineering, sold these devices directly to researchers at academic institutions who used them to publish scientific papers in peer-reviewed journals.

After work, I spend time on many different types of projects that usually involve circuit design, machining, material selection, and general fabrication/hacking.  My favorite place to be is my home workshop.

ben dot krasnow at gmail

http://www.youtube.com/user/bkraz333

http://www.linkedin.com/pub/ben-krasnow/4/6a9/679

http://www.twitter.com/BenKrasnow

Wednesday, May 6, 2015

Shrinking paper money with ammonia

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

As a follow-up to my previous video on bending wood, I show how ammonia can shrink paper money.  The money is dipped into liquid anhydrous ammonia, then dried, and the process is repeated about a dozen times.  As the money dries, it shrinks due to the surface tension of the boiling/evaporating ammonia.

Video on bending wood:
https://www.youtube.com/watch?v=9Z0SsAyHKzc
Making aerogel:
https://www.youtube.com/watch?v=X24np30GS2o


Monday, April 27, 2015

Extreme wood bending with ammonia

Bending wood with ammonia is not really DIY, but I show the process, which is extremely effective.  There is also a commercial product that is pre-treated flexible wood, which hardens after being clamped in the desired shape.

http://boingboing.net/2011/05/06/inventables.html
Hmm, it seems the product may no longer be available -- I can't find it at Inventables.
https://www.inventables.com

Pre-treated flexible wood product patent:
https://www.google.com/patents/US5360631


Sunday, April 19, 2015

Distilling pure anhydrous ammonia

I have a few upcoming projects that require anhydrous ammonia. In this video, I show how to distill it from "ammonia water" similar to common glass cleaner.
http://en.wikipedia.org/wiki/Birch_reduction
http://www.engineeringtoolbox.com/ammonia-pressure-temperature-d_361.html



Thursday, April 9, 2015

Magnetic Propulsion

This is a neat little demo that shows how permanent magnets can be used to create propulsion along a conductive copper track


Sunday, March 8, 2015

How Digital Light Processing (DLP) works

Digital Light Processing projectors use a chip that is covered with tiny mirrors that tilt back and forth. When the mirror is tilted one way, it reflects light out through the front of the projector, creating a bright pixel. When the mirror is tilted the other way, the pixel is dark. In this video, I explain how DLP works and show a macro-scale model.