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, February 28, 2011

First photos of DIY scanning electron microscope

I'll soon upload a video and full description of this project.


  1. How did you protect against x-ray production?

  2. Decelerating electrons with energy below 10KeV produces X-rays that do not penetrate through the glass and aluminum of the vacuum chamber.