Human folly for 02015-11-10

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• (youtube.com):

  Jeff Dean talks about the #TensorFlow #machine-learning system as part of his keynote last week at BayLearn15 about machine learning.

• Laserlia (repairfaq.org):

  #interferometry using cheap #laser diodes; apparently feasible with some of them to do interferometry over meters.

• Line width of green DPSS laser (physics.stackexchange.com):

  cheap DPSS green #laser sources can have interferometry over meters.

• Loops as sketches of guitar pedals in multitouch table music design (createdigitalmusic.com):

  #multitouch table user interface called #Illusio for #live-looping, by Jeraman. I love it. #UX #music

• Illusio (jeraman.info):

  "Illusio", a #multitouch user interface for #live-looping #music. #UX

• (hoxtonowl.com):

  the OWL an open-source fully-programmable FX pedal for #music, which lets you run patches written in C++ or #PureData on your guitar pedal, using an #ARM Cortex-M4. Funded on Kickstarter.

• DIY 250 lb giant mobile railgun 27000 joules (reddit.com):

  27-kJ 400V railgun #hardware.

• Marx generator (en.wikipedia.org):

  a 1924 high-voltage #hardware circuit using only spark gaps, capacitors, and resistors, capable of achieving a 5ns rise time.

• Pr%2043%20Werst%20Publications (utexas.edu):

  “Fabrication of a Compensated Pulsed Alternator for a Rapid Fire #Railgun System” #paper #pdf #weaponry

• A series basics of DIY wind controllers (gordophone.blogspot.com.ar):

  an overview of synthesizing #music with a #wind-controller like the Lyricon or #Beatjazz.

• MPXV4006 (freescale.com):

  The MPXV4006 is #hardware for sensing pressure piezoresistively, for example for detecting breath pressure for a wind controller. It costs about US$13. 6kPa, 10mA, 766 mV/kPa, ±2.5%. No clue on SNR or response time. Suggested applications are respiratory equipment and washing-machine water-level measurement. Used by Gordophone’s DIY #wind-controller. #pdf

• Building breath controller (gordophone.blogspot.com.ar):

  describes how to do USB #MIDI on an #Arduino Teensy to make a breath controller (#wind-controller) for #music!

• Beatjazz controller (makezine.com):

  "Beatjazz" is a personal-area network with a #wind-controller that Onyx Ashanti designed for his performances. Purely open source.

• (onyx-ashanti.com):

  The designer of #BeatJazz.

• The mechanical battery (damninteresting.com):

  The Bitterly carbon-fiber #flywheel, by US Flywheel Systems, spun in vacuum at 100krpm.

• Flywheels (energystorage.org):

  a low-speed #flywheel built of steel rotates up to 10krpm, while composite flywheels rotate over 100krpm at over 1km/s.

• Flywheel energy storage (en.wikipedia.org):

  #energy-density of a composite #flywheel can be up to about 400 Wh/kg, although the shape factor typically limits you to about 0.6 of that, about 900 kJ/kg.

• (energybandgap.com):

  figures on the #energy-density of different #flywheel designs. Discussion of #energy storage for I guess #solar?

• (theoildrum.com):

  notes on #energy storage in #flywheel systems