About Me

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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




Monday, December 15, 2014

Chocolate gun dispenses edible molten chocolate

I modified a standard hot glue gun to dispense molten semi-sweet chocolate. This is great for decorations and gingerbread houses.

Monday, December 8, 2014

Obeying the law (of physics)! Kinetic energy and momentum explained

In my video on the Crookes Radiometer, I showed that the devices spins because of a thermal gas effect -- not the force of photons hitting the vanes.  In the comments section, someone asked about kinetic energy and how incoming photons impart force to the rotor.  This video is a more complete answer to that question.

Monday, December 1, 2014

Encode information in fire!

A burning strip of carefully cut flash paper can encode information, which is then read by an optical sensor.  I'd like to determine if it's possible to perform computations with nothing but flash paper -- using the shape of the paper as data and program, and the flame as the readout.

Hamamatsu S7815 photodiode -- might be discontinued:

Harvard Infofuse project:

Source for flash paper and flash cotton:

Subscribe to my channel here: https://www.youtube.com/user/bkraz333

Saturday, November 29, 2014

SEM data files and image generation script

I've posted some sample data files from my SEM, and also the MATLAB/Octave script that I use to convert them into images:


Let me know if you have any questions.

This is the support structure underneath a single DLP mirror.  The width of each mirror is about 10 microns.

Ben answers your questions #1

I experiment with zinc oxide in a vacuum chamber, and answer your questions from the previous video.  If this format is successful, I'll do another Q/A session in the future.