Dave Pentecost2013-01-16 21:08:15
Finally! Anyone else already developing for Leap ?
  • 13 plusses - 32 comments - 1 shares | Read in G+
  • Dave Pentecost2014-02-24 00:51:51
    Yesterday in Palenque.
  • 23 plusses - 2 comments - 2 shares | Read in G+
  • Dave Pentecost2012-11-19 19:28:33
    LED strip with Controller

    I'm back hacking hardware. Easy, with +Jeremy Saglimbeni 's controller board kit (with Atmega processor) and the RGB strip from +Adafruit Industries . Doing a test for cove lighting in the dome.

    Thanks Jeremy and +Limor Fried !

    Controller: http://thecustomgeek.com/kits/rgbw-led-controller/rgbw-led-controller-build/

    5 meter RGB LED strip: http://adafruit.com/products/285?gclid=CJfBqMzh27MCFcuZ4AodICMAvg

    Hakko FX-888 soldering iron (!)  :  https://www.adafruit.com/products/303

    FTDI Cable: https://www.adafruit.com/products/70
    Note: You may need to download an updated driver: http://www.ftdichip.com/Drivers/VCP.htm

    12V 5A power supply: http://adafruit.com/products/352
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  • Dave Pentecost2013-03-25 18:01:36
    Voodoo Chile indeed. 

    Reshared text:
    I'm pretty sure I saw this roll through my G+ stream sometime this weekend, but this is just to good to not share again.  Killer Hendrix cover.

    Via +Boing Boing and Reddit.
  • 3 plusses - 22 comments - 4 shares | Read in G+
  • Dave Pentecost2013-03-16 12:29:46
    Another one of life's little mysteries solved.

    Reshared text:
    I have always wondered about this. It's sorcery. 

    How a Sewing Machine Works
  • 16 plusses - 6 comments - 3 shares | Read in G+
  • Dave Pentecost2013-11-16 07:22:51
    Smithsonian Online 3D Site

  • 11 plusses - 1 comments - 8 shares | Read in G+
  • Dave Pentecost2013-12-23 22:35:31

    Reshared text:

    Maths and snow - snowdecahedron :D
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  • Dave Pentecost2013-03-23 17:32:46
    Same photo, through Drive

    Any difference in zoom ability or resolution?
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  • Dave Pentecost2013-01-27 05:26:16
    Found an old photo of our younger son. He's 26 now and a chef. Your punch line here.
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  • Dave Pentecost2013-05-24 20:06:10
    Riser framing complete

    East Village Planetarium. The blue line is the front center of the dome, a test of one section of future cove lighting that will circle the bottom.
  • 13 plusses - 4 comments - 2 shares | Read in G+
  • Dave Pentecost2012-12-29 22:08:24
    Esplora in the house

    Still amazing to me that I can get the latest Arduino board at a suburban NJ Radio Shack. Now to spend some hours trying it out. Right out of the box it should work as a game controller for Unity - the joystick is putting out up down left right arrows, the right button is a space, other buttons N, V, and B.

    Like other newer Arduino boards, the Esplora is a USB HID device.  There is a page of instructions on the Arduino site about using the library for this:


    And in the last day or so, +Jeremy Shore has released code that lets the Esplora work as a controller for a number of game emulators, including Snes9X and JNES. 

    For me, this board is a way to grab the attention of our girls, age 11 to 16, who will be the core of a Space Girls project that includes running programs on ArduSat, the Arduino based orbital satellite that we backed in a Kickstarter campaign last summer. We will have to move on from this board eventually - it does not expose the pins for I2C that are used in ArduSat - but this looks like fun for all of us.
  • 8 plusses - 8 comments - 3 shares | Read in G+
  • Dave Pentecost2013-09-10 02:40:00

    Reshared text:
    Autodesk Partners with Circuits.io to Create Free Electronics Design Tool

    Autodesk today expanded its suite of free 3D tools by partnering with Circuits.io to launch an electronics design tool: 123D Circuits.

    The program allows users to create virtual breadboard-based designs to build and experiment with circuits. A virtual Arduino board can be added to the design, and the code can be edited in a browser window and simulated. The code can also be edited collaboratively (“a Google Doc for electronics” Autodesk claims).

    The program also provides hooks that allow users to have the virtual boards professionally manufactured.

    Read more about this exciting acquisition: http://ow.ly/oItCw
  • 13 plusses - 1 comments - 3 shares | Read in G+
  • Dave Pentecost2013-05-13 20:04:51
    Planetarium offices - Mine and Carter's

    Just working out the best layout for desks in my future office and in the dome control room and "space center". For the first time I can sit in the place that has been 3 years under construction. A folding table for now, but it's still a thrill.

    Contrast with Carter Emmart's office in the American Museum of Natural History, where he is director of astrovisualization. His place shows a quirky 15-year accumulation of space toys and souvenirs of his travels. Mine will get some character over time but I doubt I will ever match his. Who could?
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  • Dave Pentecost2014-04-14 19:03:35

    Reshared text:
    Looping stop motion of a 3D printed bear...climbing stairs
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  • Dave Pentecost2013-03-30 04:50:52
    Airstream Revealed

    After 18 months protected from the construction around it, the 1958 Airstream trailer is almost ready to uncover. Ceilings have the final paint coat, and the walls are rolled, not sprayed, so I pulled back the tarp to take a look.

    In the summer of 2011, my son Will and I spent weeks polishing and preparing the trailer to be hoisted in. That fall it was hoisted into the building.

    See this video: Airstream - From the Adirondacks to Avenue D (version1)
    And this story in Make: http://blog.makezine.com/2011/12/01/lower-east-side-girls-club-gets-airstream-trailer-on-the-second-floor/

    There's a lot of work ahead to convert it to a recording studio, but the shine is inspiring. And it's always a surprise to visitors when we walk through the building. The future is curved.
  • 9 plusses - 7 comments - 2 shares | Read in G+
  • Dave Pentecost2013-08-08 20:33:06
    Dome in Action

    I made a first attempt to get a shot of the planetarium in its mostly complete state, with seating and projection. Here's the best I've done so far.
  • 12 plusses - 7 comments - 0 shares | Read in G+
  • Dave Pentecost2013-03-29 22:51:15
    360 Video and Photos with GoPro Hero Cameras

    Of course someone has been working on this. They say they are releasing it in March. Whoops. Stay tuned. Good timing for dome experiments. 
  • 2 plusses - 15 comments - 2 shares | Read in G+
  • Dave Pentecost2013-06-14 23:49:18
    First Flight

    A shot just now of the whole dome - ISS over Earth.
  • 10 plusses - 8 comments - 0 shares | Read in G+
  • Dave Pentecost2013-12-24 18:17:42
    MiniPlanet Editor for Unity

    Not released yet. Looks like fun.
  • 7 plusses - 3 comments - 4 shares | Read in G+
  • Dave Pentecost2014-02-25 13:41:01
    Via +Yonatan Zunger

    Reshared text:
    This is an animation of DNA replication by DNA polymerase and accurately shows the function of all its subunits.

    Source: http://youtu.be/OjPcT1uUZiE

    h/t: chemistrydoc
  • 7 plusses - 7 comments - 2 shares | Read in G+
  • Dave Pentecost2012-07-13 17:33:51
    View from the cat walk

    The big box for the planetarium is complete except for final spackling and painting. Two out of four walls are double thickness with up to 5 layers of sheetrock for soundproofing. I did some sheetrocking in my day but these guys are amazing.

    Here's a view from a ledge at the second level. 
  • 2 plusses - 18 comments - 0 shares | Read in G+
  • Dave Pentecost2013-04-18 20:28:14
    Dome frame is raised
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  • Dave Pentecost2013-01-27 18:10:55
    From twitter @howardtaylor

    "Not my problem" in Polish is "nie moj cyrk, nie moje malpy." Literally "not my circus, not my monkey."
  • 5 plusses - 7 comments - 3 shares | Read in G+
  • Dave Pentecost2014-02-24 03:51:03
    Via +Assia Alexandrova

    Reshared text:
    Mathematician and Artist Robert Bosch does some amazing work with mosaics, dominoes, and labyrinths.  This piece is a Travelling Salesman tour in the form of Fibonacci.

    You can check out more of Bosch's work here:  http://www.dominoartwork.com/
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  • Dave Pentecost2014-03-05 18:25:12
    In the Airstream

    Work proceeds on the Airstream recording studio in the Lower Eastside Girls Club.

    All under floor work (power, ducts, conduits) is done and subfloor, iso layer, and finish floor installed. Now it gets covered to complete the interior. Framing is for the wall between the booth and the mixing and engineering console, at the far end.
  • 9 plusses - 8 comments - 0 shares | Read in G+
  • Dave Pentecost2014-01-09 16:51:29
    Airstream Interior Stripped

    Our new crew started yesterday, in a process to build the recording studio in the 1958 Airstream, on the second floor of the new facility.

    I had stripped the bottom half of the interior panels before it was transported and hoisted into the second floor of the building 2 years ago. We've been busy with other things, like the planetarium, cafe and bakery, offices, but it's time for the Airstream.

    The last half of the 50 year-old fiberglass insulation, riddled with field mouse burrows, has remained hidden. The crew came in and carefully removed it all, then cleaned up the evidence. Bravo!

    Now for the wiring, re-insulation for acoustic requirements, re-skinning with perforated aluminum. Stay tuned.

  • 9 plusses - 8 comments - 0 shares | Read in G+
  • Dave Pentecost2013-08-01 00:29:33
    Small post, major milestone

    For those following the building saga: we received our TCO (temporary certificate of occupancy) today, after 3 years of construction (17 years of planning) and major delays along the way. Kitchen gas, ansul system, chimney and ventilation slowed us down, as did poor advice from our builder/partners, whom we kicked out in January.

    But that's all behind us now. Up until today, it was Occupy Girls Club. Now that we are legal with the Department of Buildings, we move ahead. The fun begins.
  • 9 plusses - 8 comments - 0 shares | Read in G+
  • Dave Pentecost2012-02-11 20:30:44
    Cathedral, San Cristobal de las Casas, Chiapas, Mexico - Feb 2011

    My wife left this morning on a trip to San Cristobal. This is an equirectangular photo I took handheld with a Canon 5D and Sigma 8mm fisheye, 6 shots stitched.

    Part of #SacredSunday curated by +Bill Wood +Manfred Berndtgen +Charles Lupica
  • 8 plusses - 7 comments - 1 shares | Read in G+
  • Dave Pentecost2014-03-20 17:47:58
    Old dude in the dome

    Yes, that's me with a cell nucleus animation from Drew Berry. Testing lighting for presenters - how to light the person without blowing out the dome.

    Cropped fisheye shot, 4.5mm lens on Panasonic GH3 with adapter.
  • 13 plusses - 2 comments - 0 shares | Read in G+
  • Dave Pentecost2011-11-30 03:16:45
    Some beautiful ZBrush and Unity 3D work. Think I'll work on some stones and Maya carvings.
  • 10 plusses - 6 comments - 0 shares | Read in G+
  • Dave Pentecost2013-02-11 06:14:28

    Reshared text:
    Is internet access in the US a luxury or a utility?

    "In Hong Kong, you can get a 500Mbt symmetric connection for about $25/ month..."

    Susan Crawford on Why U.S. Internet Access is Slow, Costly and Unfair

    Susan Crawford, former special assistant to President Obama for science, technology and innovation, and author of Captive Audience: The Telecom Industry and Monopoly Power in the New Gilded Age, joins Bill to discuss how our government has allowed a few powerful media conglomerates to put profit ahead of the public interest — rigging the rules, raising prices, and stifling competition. As a result, Crawford says, all of us are at the mercy of the biggest business monopoly since Standard Oil in the first Gilded Age a hundred years ago.

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  • Dave Pentecost2013-05-24 16:02:36
    This time with the seating and dome overlaid.
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  • Dave Pentecost2013-01-27 18:41:47
    Holy ship!

    Reshared text:

    Moebius Ship
    Tim Hawkinson
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  • Dave Pentecost2013-09-30 22:23:56
    And farewell my favorite work spot

    Until next year.

    Yes, I can work with beer and peanuts.
  • 11 plusses - 4 comments - 0 shares | Read in G+
  • Dave Pentecost2013-09-14 20:50:14

    Reshared text:
    ESO telescopes create the best 3D map yet of central bulge of the Milky Way

    Two groups of astronomers have used data from ESO telescopes to make the best three-dimensional map yet of the central parts of the Milky Way. They have found that the inner regions take on a peanut-like, or X-shaped, appearance from some angles. This odd shape was mapped by using public data from ESO’s VISTA survey telescope along with measurements of the motions of hundreds of very faint stars in the central bulge.

    Full story here: http://www.eso.org/public/news/eso1339/

    Image Credit: ESO/NASA/JPL-Caltech/M. Kornmesser/R. Hurt

    #science   #milkyway   #vista   #eso   #astronomy  
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  • Dave Pentecost2013-01-10 03:00:58
    A little clumsy in my posting of this. Sorry if you get it more than once.

    Reshared text:
    I got my 1.8" TFT LCD today, and after some fiddling with pin assignments it is working on the Esplora with the Adafruit libraries and the graphics test sketch.

    Here is the change you have to make in the setup of the sketch:

    #define sclk 15
    #define mosi 16
    #define cs   7
    #define dc   0
    #define rst  1  

    Have fun! Thanks +Adafruit Industries !
  • 8 plusses - 8 comments - 0 shares | Read in G+
  • Dave Pentecost2013-11-14 21:27:16
    Cruising Mars, Bangkok to NYC

    Two nights ago, at the end of a spectacular opening night in our new facility, +Carter Emmart connected from Bangkok, controlling our dome and giving a few of our friends a tour of the surface of Mars. Carter helped create the Uniview software that makes this possible, and he has moved us faster than I believed we could, to make this happen.

    Here is a view of the "Hanging Cliffs" of Valles Marineris from that session. It was a thrilling milestone in our plans to use the dome for international connection and in Google Hangouts on Air.

    Att +Abby Bouchon 
  • 8 plusses - 1 comments - 3 shares | Read in G+
  • Dave Pentecost2013-02-06 20:32:21
    From this...to this

    Today was the first day I could sit down in the space. In my chair. With our first FIOS connection. In the new building.

    I'm reposting a 360 panorama of the pouring of the basement slab on the site, when we were just getting out of the ground. That was around 2 years ago. And I just took the shot of my chair, in the temporary base camp we are setting up to manage the fit-out of the building. By summer the chair will be in the production room of the planetarium. We're close.
  • 9 plusses - 6 comments - 0 shares | Read in G+
  • Dave Pentecost2013-10-19 16:13:18

    Reshared text:
    See how exciting your life is...!
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  • Dave Pentecost2013-01-27 02:32:19
    Arduino Esplora to Electric Imp to remote Imp

    Following in the footsteps of +Mike Barela I have connected the Esplora to the Electric Imp and sent serial communications to a remote Imp by way of the Imp servers. Photos below. 

    I used the physical setup that Mike devised, connecting the Imp to pins 7 and 8 of the Esplora expansion headers (D0 and D1 of the Arduino) which are RX and TX respectively. I used an +Adafruit Industries April Impee board and a Sparkfun logic level converter to shift the Arduino's 5V signals to 3.3V for the Imp.


    For a first test of connection I followed the Sparkfun tutorial here:

    (note that you will have to change the Arduino sketch serial to pins 0 and 1 instead of 8 and 9).

    And Mike's posting here:


    Mike has gone on to other variations of wireless connection, but he hasn't used the Imp yet to my knowledge. 

    Thanks +electric imp !
  • 2 plusses - 4 comments - 5 shares | Read in G+
  • Dave Pentecost2013-09-29 17:51:13
    A Postcard Day

    And we needed it.
    Echo Lake, Adirondacks.
  • 9 plusses - 1 comments - 2 shares | Read in G+
  • Dave Pentecost2014-02-06 17:18:19
    Dome Redux

    Ran across this photo of our planetarium from last fall, thought I'd repost it for the newcomers. I have finally installed a box around the projector to protect it. I'll post a photo of that soon.

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  • Dave Pentecost2014-04-01 14:11:32

    Reshared text:
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  • Dave Pentecost2014-01-18 23:40:05

    Reshared text:
    River history as glowing landscape - "...dynamic movements the river has made in recent millennia...LiDAR-derived digital elevation model" LiDAR is a remote sensing technology that measures distance by illuminating a target with a laser and analyzing the reflected light. 

    This lidar-derived digital elevation model of the Willamette River displays a 50-foot elevation range, from low elevations (displayed in white) fading to higher elevations (displayed in dark blue). This visually replaces the relatively flat landscape of the valley floor with vivid historical channels, showing the dynamic movements the river has made in recent millennia. This segment of the Willamette River flows past Albany near the bottom of the image northward to the communities of Monmouth and Independence at the top. Near the center, the Luckiamute River flows into the Willamette from the left, and the Santiam River flows in from the right. Lidar imagery by Daniel E. Coe.

    The Oregon Department of Geology and Mineral Industries (DOGAMI) has been collecting lidar data in Oregon since 2006. The goal is to cover the entire state as funding for data collection becomes available. You can learn more about lidar and view lidar images of other parts of Oregon at www.OregonGeology.org.

    Lidar is popularly used as a technology used to make high resolution maps, with applications in geomatics, archaeology, geography, geology, geomorphology, seismology, forestry, remote sensing, atmospheric physics, airborne laser swath mapping, laser altimetry, and contour mapping.


     #science #geography #cartography #map #LiDAR #river #history #data #geomatics #archaeology #geography #geology #geomorphology #Oregon 
  • 7 plusses - 1 comments - 3 shares | Read in G+
  • Dave Pentecost2011-11-19 17:50:09
    Moon Mesh in ZBrush

    Att +Andrew Plumb +Pixologic, INC

    Following up on Andrew's post
    And +Lucas Walter 's "Sure, i can do it"
    we now have a nice mesh of the moon, based on the latest NASA data, and created by Lucas.

    ZBrush handles the 4 million polygons easily. Nice work by a quick G+ team (all I did was cheer lead and open it in ZBrush).

    Links to the mesh and data are on Andrew's original post and Lucas' comments.
  • 2 plusses - 10 comments - 2 shares | Read in G+
  • Dave Pentecost2013-04-28 14:58:12
    Mothership - Finished

    I arrived too late this morning to see the last piece go into place. But there's plenty of work left to turn Area 51 into a digital dome theater. And there will never again be this much light blasting the dome. 

    A couple of hours of cleanup, then a possible quick run up to the American Museum of Natural History, to see the Hayden planetarium. The blokes (John, Dino, and Mike) fly out to London at 6pm. Then Colombia, Czechoslovakia, and other destinations. Wherever a dome needs building. But now that they've had a taste of the East Village, they'll be back.
  • 7 plusses - 3 comments - 2 shares | Read in G+
  • Dave Pentecost2012-08-17 16:58:26
    Center for Community - a Milestone Reached

    For those of you who have been following our saga, constructing a community science and art center in lower Manhattan, here's some news.

    After an extended period of high anxiety, this morning we passed the walkthrough inspection for a Temporary Certificate of Occupancy from the New York Department of Buildings. TCO is all we have obsessed about for weeks. This is some kind of financial milestone for our builder/partners, but for us it means we can proceed with our fit out, building the planetarium, the Airstream recording studio, storage, ramps, platforms, risers, office partitions, etc.

    Here's a photo of the 1958 Airstream framed in its second floor facade. How did they do that? Exactly.
  • 4 plusses - 7 comments - 2 shares | Read in G+
  • Dave Pentecost2013-01-18 02:50:36
    First tests with Leap Motion and Unity 

    The Unity demo that came with the Leap SDK was pretty simple - move one cube around on a grid - so I started playing with it. First physics, pulling things around that had drag and mass, and hitting a ball across a plane. Then to get +Laura Lynn Gonzalez 's attention I added some protein models and played with grabbing and rotating them. 

    I also showed the controller to the Beatniks class at the Girls Club today. That's a STEM class masquerading as just having fun with anything we have on hand. They loved it, but we have to take it to the next level. Quick.

    Thanks, +Leap Motion !
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  • Dave Pentecost2013-11-06 15:06:00

    Reshared text:
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  • Dave Pentecost2013-02-18 02:00:29
    Marimbas, Meteors, Musser and Me

    That's me, 1968, just below the sign. With my Musser marimba. And I just found out that Clair O. Musser, whose company made that marimba, was a meteor (actually meteorite) collector who built a xylophone out of meteorites (see my last post). Go figure.
  • 9 plusses - 4 comments - 0 shares | Read in G+
  • Dave Pentecost2013-01-02 01:04:00
    Now we're talking. Who's going to do it with Wi-Fi?

    Reshared text:
    One step closer to XBox domination: portability
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  • Dave Pentecost2012-06-08 00:19:47
    Unboxed Airstream

    The protective plywood box has been removed from the '58 Airstream and it has taken its place by the window on Ave D. Today Will and I removed the casters and set the trailer in the spot it will sit until some future Philistine saws it into pieces - it is not rolling anywhere from this second floor perch. Planning now for the conversion to recording studio, center piece of the Radio Lounge.
  • 6 plusses - 8 comments - 0 shares | Read in G+
  • Dave Pentecost2013-07-21 23:55:11
    Did nothing today except cruise the web and paddle after two loons on the lake. Perfect.
  • 11 plusses - 1 comments - 0 shares | Read in G+
  • Dave Pentecost2013-06-11 13:12:06
    Cue Also Sprach Zarathustra

    Main server rack arrives.
    Richard Strauss - Also Sprach Zarathustra / 2001 Space Odyssey opening theme
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  • Dave Pentecost2014-03-28 22:45:07
    Good essay on their photogrammetry techniques.

    Reshared text:
    This is not real.
    The scene is from the game The Vanishing of Ethan Carter by the same guys that made Bulletstorm and Painkiller - the polish game studio The Astronauts.

    In their new game, photogrammetry  is used to create a believable 3D world which is pretty darn close to photorealistic.  Not so strange, since photogrammetry involves using a very large number of photos and positioning data to create the models.

    Read more here

    #mindblowingdesign   #games   #photorealism  
  • 6 plusses - 1 comments - 3 shares | Read in G+
  • Dave Pentecost2013-10-15 17:32:10
    Processing team, first day in the Dome

    Roopa Vasudevan, +Andres Colubri and +Daniel T Shiffman looking at +Marius Watz 's Rotating Arcs sketch in the East Village Planetarium last week. Preparing for a full day workshop and followup show with students from NYU ITP. My plan is working.

    Better G+ page for Dan is here: +Daniel Shiffman 
  • 10 plusses - 2 comments - 0 shares | Read in G+
  • Dave Pentecost2013-07-07 01:59:56
    Via +Laura Gibbs 

    Just bought the first two in original paperback at a used book store today. I think I read the first as a kid. Time to take another look.

    Reshared text:
    Isaac Asimov’s Sci-Fi Classic, The Foundation Trilogy, Dramatized for Radio by the BBC.  8 Hours of Audio Goodness: http://cultr.me/QMtz5K 
  • 6 plusses - 3 comments - 2 shares | Read in G+
  • Dave Pentecost2012-01-04 17:18:27
    Via +L. LaRae Redford

    Simple and effective demonstration. Worth hours of time management nattering.
    Att: +Ted Ewen

    Reshared text:
    Parable of Time Management

    One day, an expert in time management was speaking to a group of business students and, to drive home a point, used an illustration those students will never forget. As he stood in front of the group of high-powered over-achievers he said, "Okay, time for a quiz" and he pulled out a one-gallon, wide-mouth mason jar and set it on the table in front of him. He also produced about a dozen fist-sized rocks and carefully placed them, one at a time, into the jar. When the jar was filled to the top and no more rocks would fit inside, he asked, "Is this jar full?" Everyone in the class yelled, "Yes." The time management expert replied, "Really?" He reached under the table and pulled out a bucket of gravel. He dumped some gravel in and shook the jar causing pieces of gravel to work themselves down into the spaces between the big rocks. He then asked the group once more, "Is the jar full?" By this time the class was on to him. "Probably not," one of them answered. "Good!" he replied. He reached under the table and brought out a bucket of sand. He started dumping the sand in the jar and it went into all of the spaces left between the rocks and the gravel. Once more he asked the question, "Is this jar full?" "No!" the class shouted. Once again he said, "Good." Then he grabbed a pitcher of water and began to pour it in until the jar was filled to the brim. Then he looked at the class and asked, "What is the point of this illustration?" One eager beaver raised his hand and said, "The point is, no matter how full your schedule is, if you try really hard you can always fit some more things in it!" "No," the speaker replied, "that's not the point. The truth this illustration teaches us is, "If you don't put the big rocks in first, you'll never get them in at all. What are the 'big rocks' in your life, time with loved ones, your faith, your education, your dreams, a worthy cause, teaching or mentoring others? Remember to put these BIG ROCKS in first or you'll never get them in at all. So, tonight, or in the morning, when you are reflecting on this short story, ask yourself this question, "What are the 'big rocks' in my life?" Then, put those in your jar first.
    If this inspired you, share with others so they can benefit!
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  • Dave Pentecost2012-02-11 06:08:35
    Building an iPad Game in Javascript, HTML5

    Another good tutorial from the creative js blog
  • 5 plusses - 2 comments - 3 shares | Read in G+
  • Dave Pentecost2013-04-05 04:08:40

    Reshared text:
    RFduino, the tiny 32-bit Arduino based development board with onboard Bluetooth

    See it in action - 
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  • Dave Pentecost2014-04-14 04:40:36
    Via +david mcconville

    Reshared text:
    Ephemeralization - Doing more with less - Buckminster Fuller 
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  • Dave Pentecost2012-04-02 21:27:13
    Beautiful Map Tiles for OpenStreetMaps
    Via +John Gruber

    ATT: +Jeff Ferzoco
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  • Dave Pentecost2013-03-29 20:17:59
    Neurodome, Our Dome, Your Dome

    We had a great visit this week from the Neurodome folks, who are launching a production of a brain science dome show. Here's Jonathan, Titi, and friend Judith who got us together, in the room that shall be dome. Next time we hope +Jeanne Garbarino, +Carter Emmart and other pals and colleagues will come visit.

    Support them! Here's the Kickstarter page:

    And their website:
  • 3 plusses - 9 comments - 1 shares | Read in G+
  • Dave Pentecost2013-08-20 00:37:35
    Dome LED lighting for tiers, stairs

    Just completed the first version of the entrance LED lighting, using a v3 driver board from +Jeremy Saglimbeni :


    Instructions for v3 are not on his site yet, but you can ask for the 2.2 version or puzzle out the differences, which aren't major, other than handling more power and more LEDs.

    Cove lighting will also help people find their seats. I started with that but then realized that the steps were a priority, as people including myself were stumbling on the way in. A temporary little spotlight helped, but these LED strips can be dimmed once people are in place. They can also be controlled over OSC and Processing, on an iPhone.

    ATT: +Kris Kortright 
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  • Dave Pentecost2012-12-20 04:29:56
    Nature of Code - Make it a smart Christmas

    +Daniel Shiffman's book is out in many formats, including the ones suitable for Christmas gifts.

    It's a brilliant look at how we think, the algorithms of nature, and how the Processing language lets us model those things. Also a perfect introduction to coding. How can you miss?

    Free HTML:

    Pay what you want PDF:

    Print copy:
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  • Dave Pentecost2013-10-04 22:24:52
    Moonlight. Just played this in our planetarium. ah...

    Reshared text:
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  • Dave Pentecost2013-09-10 00:42:08
    Cove lights in the Dome

    It's not quite as over the top as this long exposure would suggest. But the DIY cove lights are looking good. They'll serve as house lights while the audience finds their seats.

    Power supplies, 30 meters of  RGB LEDs from Adafruit , in two 15-meter circuits

    And two V3 controller boards from +Jeremy Saglimbeni 

    The LEDs on the steps are separate circuits, same components.
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  • Dave Pentecost2013-07-02 00:10:29
    Airstream Ranch Panorama

    Another for +Jaime Martorano 
    Click and drag to navigate.
    NOTE: Just realized I uploaded directly from my computer. Google compresses large photos when you do this. I'll upload a second version from Google Drive, which keeps it high resolution.

    Jaime - Driving east from Tampa on Rte 4, this is on the right side. Less than a mile later is Bates RV. If you stop there, they give you a little map to drive back to the Airstream Ranch. Definitely a great stop, and they are friendly and chatty. We barely made it before closing time at the RV dealership. You'd be hard pressed to figure out how to get to Airstream Ranch without their guidance.
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  • Dave Pentecost2012-12-30 22:56:52
    Useful Arduino Esplora links

    I've got a working Esplora to Processing to OSC to Unity demo but it is a little clunky. I'll post it later once I am ready.

    Meanwhile, a list of links I've found useful.


    Getting started

    This shows how to adapt normal Arduino sketches to the Esplora

    This is the basis for communicating with a Processing sketch. I adapted the Processing sketch to send OSC, then built a Unity demo to receive it.

    The (limited) list of keyboard commands you can use when the Esplora is in HID USB mode.

    Many Arduino examples, including Esplora at bottom right of the page.

    The Accelerometer example, which I am going back to now to see if there is a simpler way.

    Someone who hacked an Arduino, accelerometer, and Unity together, without OSC. There is a note of a bug on the Mac at the bottom of the thread, and a link to a supposed solution that is interesting but really another OSC hack (and only uses a pressure sensor). The bug may be as simple as removing ".Ports" from the Unity script "using System.IO.Ports;" - I remember running into that when I hacked my first OSC script. I'll try and see. If this can be adapted, it is a simpler, serial based accelerometer to Unity hack. I love OSC but it may not be necessary for this.
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  • Dave Pentecost2012-12-01 19:32:01
    See the last chart - Samsung spent nearly $12 billion in 2012 on sales and marketing, Apple around $1 billion. Samsung's expenses include massive incentives to carriers and stores to push their products.

    And Apple haters still say Apple's success is just in the marketing!
  • 3 plusses - 11 comments - 0 shares | Read in G+
  • Dave Pentecost2013-12-25 20:34:17

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    Temari spheres

    Temari spheres are beautifully crafted balls created from a combination of silk remnants and embroidery. The history of the balls start in ancient China and moved to Japan. In the 1960′s, NanaAkua’s grandmother learned to make these decorative balls and has continued with her passion for almost 50 years. Over those years, this artistic grandmother has created over 500 unique Temari balls and continues to produce them today at 92 years old. What makes this even more incredible is the necessity for finger dexterity, control, and good vision to make these decorative orbs, an amazing feat for a 92-year old.

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  • Dave Pentecost2013-08-08 12:42:22

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    Animation fast-forwards through turtle shell evolution, based on developmental and fossil data.

    HT +John Hutchinson 
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  • Dave Pentecost2012-02-26 19:03:29
    The Spanish and the Maya

    The Cathedral in San Cristobal de las Casas, and the Temple of the Inscriptions, Palenque. Both in Chiapas, Mexico.

    For #SacredSunday, curated by +Charles Lupica +Bill Wood and +Manfred Berndtgen .
  • 4 plusses - 5 comments - 2 shares | Read in G+
  • Dave Pentecost2013-01-12 03:15:46
    Electric Imp

    So I'm making my way through the wireless alternatives for Arduino. I've tried Xbees. They're fun. Tried Bluetooth LE. Nice to control the Arduino with an iPhone but the next step is a big one.

    Now the Electric Imp. Looks like a nice system. I could probably learn enough of their Squirrel language to use it. Lots of web-based support and graphic configuration between Imps in the field. This could be really useful.
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  • Dave Pentecost2013-06-10 12:39:10
    Luna Moth Morning

    Guess it was a long night.
  • 7 plusses - 3 comments - 1 shares | Read in G+
  • Dave Pentecost2013-06-18 20:55:44
    VORTEX in the house

    I've been playing videos in the dome for hours, trying the things I've stashed away for this day. One of the great ones is Vortex by +Aaron Bradbury of NSC Creative. Short and punchy. Great sound, though I don't have my 5.1 hooked up yet.
  • 4 plusses - 7 comments - 1 shares | Read in G+
  • Dave Pentecost2013-06-23 16:41:25

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    Angela Palmer's 3D glass sculptures will get inside your head

    How’s your head this morning? Angela Palmer could tell you – and she’d do it in the form of a painstakingly etched glass image of your brain. Inspired by the process of visualising and mapping natural forms, Angela takes details from MRI and CT scans and engraves them onto sheets of glass, which she then layers one on top of the other to recreate the human form and images of the brain. The result of such a process is an eerily elusive sculpture; from the front the viewer sees a full depiction of the interior architecture of the head in all of its three-dimensional glory, but from the side and the top it becomes completely invisible. Talk about mind-blowing (sorry).

    Source: http://www.itsnicethat.com/articles/angela-palmer
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  • Dave Pentecost2014-01-28 13:20:54
    Photographic proof. History Channel is right. We puny humans could never have done it ourselves.

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  • Dave Pentecost2013-11-20 09:37:46
    Our girls in the Girls Club have been preparing for this moment. They have had an after school class this fall with Emily Conrad, learning Arduino programming and sensors so they can run code on the ArduSat satellite for 3 days, and take photos of the earth with its camera.

    We backed ArduSat on Kickstarter in the summer of 2012 and are thrilled to see this. Congratulations to +Nanosatisfi +Joel Spark +Jeroen Cappaert +Peter Platzer Reka Kovacs and all the ArduSat collaborators.

    Reshared text:
    Nothing warms my heart like seeing three baby satellites leave their space station nest, thanks in part to Kickstarter. "Now the adventure begins."


    Photo: NASA
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  • Dave Pentecost2013-04-21 02:24:50
    Getting ready to install dome screen panels

    Our team of itinerant English planetarium installers (John, Dino, Mike) have finished the frame install and bracing. They're getting ready to install the screen panels, which involves carefully fine tuning and machining them to achieve the "nanoseam" join that they are famous for. Seriously.

    Today they cleaned up the room and set up their shop, and tried a first pair of panels to see how close they are. Looking good. But they will spend the next two weeks hand fitting every panel.

    After they left I spent some hours hanging lapendary panels (acoustic absorption) behind and above the dome. The panels arrived a little late but soon enough to get the most inaccessible ones up before the screen panels make it impossible. I had to do the work when no one else was around so they would not see me clambering on the frame. Not many panels in place so far, but the reverberation time has already dropped from 6 seconds to about 3. More, better looking, fabric-covered panels on the walls under the springline and I'll have a nice sounding dome room. 
  • 9 plusses - 0 comments - 1 shares | Read in G+
  • Dave Pentecost2013-03-09 22:28:12
    Doors of San Cristobal de las Casas

    A quick walk around town today, shooting while I did last errands before we go back to New York. First time I have made a large album, but not the first time I've thought about a collection of these doors. iPhone, on the run.
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  • Dave Pentecost2012-09-24 00:18:17
    Via +Edward Morbius 

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  • Dave Pentecost2012-09-04 02:21:58
    Via +Rodrigo Mesa 

    Give this link to any Republican friend (or online troll) who is buying the lies. From a writer who has voted for both Republicans and Democrats.
  • 4 plusses - 0 comments - 4 shares | Read in G+
  • Dave Pentecost2013-07-30 18:38:24
    Arduino in the House - Girls Club

    Emily Conrad and the girls are hacking Arduinos. The room is full of chatter and buzzing.
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  • Dave Pentecost2013-06-30 02:19:35
    Back at the Shack

    So quiet. Except for the bullfrogs.
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  • Dave Pentecost2012-04-21 14:24:09
    For +Olivio Sarikas

    Sometimes you get lucky with the closeup panoramas.
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  • Dave Pentecost2012-12-17 07:06:52
    That settles it.

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  • Dave Pentecost2013-04-17 22:22:46
    Dome Frame - Day's End
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  • Dave Pentecost2013-10-27 12:49:05
    The Nature of Code - Cosmos Edition

    That's what +Daniel Shiffman is calling the special workshop in our dome with his +Processing  students from ITP.


    We spent the day yesterday kicking it off, with an introduction by Dan and myself, a visit from +Andres Colubri who has created the dome projection code library, and initial Processing sketches from the students. They will return next week to show the results of their work in the dome.

    Some quick photos of Dan and his students below. Dome photos to come next week. (See also my previous post on Processing in the dome - https://plus.google.com/u/0/116599331662269985445/posts/4Jh9ri6rd3r )
  • 3 plusses - 1 comments - 4 shares | Read in G+
  • Dave Pentecost2013-09-20 23:10:37
    Maya incised bone, line drawing, first 3D print

    Actually, a 3rd try after some fails. Had to get the line size right for the printer. This and my fossils are my contribution to Maker Faire tomorrow.

    Incised bone, circa 8th century AD Maya, Tikal, Guatemala, drawn by Linda Schele and first published in 1986, posted to the Schele Archives online by Justin Kerr, downloaded and converted to SVG and STL. Detail from the complete drawing.
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  • Dave Pentecost2013-08-13 15:04:20
    New work starting on Airstream

    With office and kitchen finishing, planetarium building, organization packing and moving, IT and phone installation, it's been a full summer. The Airstream recording studio has waited until now, when the duct silencers have arrived. They are the metal boxes on the left. AC supply and return will come down the wall, across that back alley floor, into the bottom of the trailer. Then cable ducts and power can be installed under the floor frame, floors and new interior sound baffles and perforated metal skin can be installed. And we are on our way.
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  • Dave Pentecost2011-08-02 00:50:13
    All set in the warehouse staging area for the Airstream frame work. Here's one of my 360 panos. Bizarre giant mostly empty warehouse.
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  • Dave Pentecost2014-02-19 18:02:41
    In Chiapas. Jungle tomorrow.
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  • Dave Pentecost2014-01-26 14:33:57
    Via +Julio Poisot De María

    I've seen some of these before, but this is a great collection.

    Reshared text:
    The 33 Most Beautiful Abandoned Places In The World

    In the photo: El Hotel del Salto in Colombia.

    Look the others: http://imgur.com/a/D9iDC

    #amazing   #photography   #photos   #photooftheday  
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  • Dave Pentecost2013-07-07 16:28:34
    This looks like the start of a good series.

    Reshared text:
    The Way the Universe Changed

    At the end of the 1800s we finally knew how the universe worked.  Newton’s laws of motion and gravity had been studied for 200 years, and had become the pinnacle of scientific precision.  James Clerk Maxwell had unified the electricity, magnetism and light into a single elegant theory, and Darwin’s theory of evolution explained how living things were connected.  There were still mysteries to be explored, but it seemed the grand structure of the universe was now known.  We lived in a clockwork universe, where cause led to effect, where simple laws governed complex mechanisms.  It was a proven world, as I’ve written about in an earlier series of posts (http://goo.gl/6MVg0).  

     At the time it was generally thought that the nagging mysteries such as the structure of atoms and the structure of the universe would eventually come into the Newtonian fold.  But they didn’t.  Instead, small mysteries became large ones.  The physical laws we thought we understood didn’t always apply.  Understanding atoms and light would require a radically new way of looking at the universe.  Some of the most cherished scientific ideas of precision and determinism would have to be discarded or revised.  Science would undergo a quantum revolution.

    Between 1900 and 1950 our understanding of the universe underwent a fundamental shift from a classical, clockwork universe to a quantum universe of probabilities and interactions.  It was a shift that revealed a universe that was larger, younger and more profoundly complex than we had imagined.

    This shift can be summarized in six simple equations shown below.  Each one was a step toward modern quantum theory.  

    1. The more you have, the faster it is gone.
    2. Sometimes you have to make a quantum leap.
    3. Every temperature has a color.
    4. Light is a wave, except when it’s not.
    5. What you observe depends on how you observe it.
    6. There are some things you can never know. 

    So this week we’ll look at each of these equations, how we came to understand them, and how they changed our view of the universe forever.  We’ll start with the first one tomorrow.  It describes radioactive decay, and it was the first clue that certain effects don’t have a mechanical cause.

    The quantum revolution starts tomorrow.
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  • Dave Pentecost2013-04-22 12:55:51

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    The Most Beautiful Wisteria Tree in the World

    In the Ashikaga Flower Park in Tochigi, Japan sits an incredibly gorgeous wisteria tree that's often referred to as the most beautiful in the whole world. The largest and oldest in Japan, the tree is the main attraction at the flower park as visitors flock to see it in full bloom. Dating back to approximately 1870, the 143-year-old tree has branches that are supported by beams, which creates a a stunning flower umbrella.

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  • Dave Pentecost2013-03-02 02:48:25

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    NEW PRODUCT – WiFi Portable Microscope – Usable With Android/iPad/iPhone

    NEW PRODUCT – WiFi Portable Microscope – Usable With Android/iPad/iPhone – As electronics get smaller and smaller, you’ll need a hand examining PCBs and this little USB microscope is the perfect tool. Its smaller and lighter than a large optical microscope but packs quite a bit of power in its little body. There’s a high quality 640×480 camera sensor inside and an optical magnifier that can adjust from 5x (for basic PCB inspection) to 200x (for detailed inspection). Eight mini white LEDs are angled right onto whatever you’re examining so you get enough lighting to see, and are smoothly adjustable via a dial on the side.

    Unlike our USB microscopes, this ‘scope is WiFi based. This means that instead of having a cable or wireless-usb-dongle type connection, there’s a WiFi access point inside the camera enclosure. When you turn it on, it will create a new hotspot just for the camera, so that any tablet or smartphone (such as an iPad/iPhone/Android/etc) can connect to the camera and view the microscope’s video output. This isn’t possible with a USB microscope as many tablets and phones don’t have a USB port and even if they did, there wouldn’t necessarily be drivers available for the camera.

    Comes with the microphone, charging cable, CD with software and manual. A stand is not included, the photo above shows it with our articulated aluminum stand (which works great). While this camera is more expensive than a wired-variety, there’s nothing like it for when you want to view the output on a smartphone or tablet!

    In stock and shipping now!

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  • Dave Pentecost2013-11-30 22:34:58
    Keeping an eye on this.

    Reshared text:
    Very cool looking 3d scanner, will be about $350, from Occipital (http://occipital.com/). Via +Mike Zyda on facebook.
  • 3 plusses - 5 comments - 2 shares | Read in G+
  • Dave Pentecost2013-09-22 06:26:33

    Reshared text:
    Our dynamic Earth.

    An amazing simulation of Earth's wind and water currents.

    Via +NASA +NASA's Earth Observatory 
  • 5 plusses - 0 comments - 3 shares | Read in G+