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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, May 26, 2014

Measure car engine speed RPM via the cigarette lighter

I setup my new oscilloscope to measure a car's engine speed by connecting to the cigarette lighter.  The inductive kicks from the ignition coil provide a timing signal that can be used to calculate RPM.  In this particular car (a DeLorean), the engine fires unevenly by design, so the inductive kicks are not all regularly spaced.



  1. supercool idea ! Thanks for sharing !

  2. http://www.wired.co.uk/news/archive/2014-07/31/nasa-validates-impossible-space-drive
    "Roads? Where we're going, we don't need roads."