Marc's Public Blog


All | Aquariums | Arduino | Btrfs | Cars | Cats | Clubbing | Computers | Dining | Diving | Electronics | Exercising | Festivals | Flying | Halloween | Hbot | Hiking | Linux | Linuxha | Mexico | Monuments | Museums | Outings | Public | Rc | Sciencemuseums | Solar | Tfsf | Trips




More pages: April 2024 March 2024 February 2024 January 2024 December 2023 November 2023 October 2023 September 2023 August 2023 July 2023 June 2023 May 2023 April 2023 March 2023 February 2023 January 2023 December 2022 November 2022 October 2022 September 2022 August 2022 July 2022 June 2022 May 2022 April 2022 March 2022 February 2022 January 2022 December 2021 November 2021 October 2021 September 2021 August 2021 July 2021 June 2021 May 2021 April 2021 March 2021 February 2021 January 2021 December 2020 November 2020 October 2020 September 2020 August 2020 July 2020 June 2020 May 2020 April 2020 March 2020 February 2020 January 2020 December 2019 November 2019 October 2019 September 2019 August 2019 July 2019 June 2019 May 2019 April 2019 March 2019 February 2019 January 2019 December 2018 November 2018 October 2018 September 2018 August 2018 July 2018 June 2018 May 2018 April 2018 March 2018 February 2018 January 2018 December 2017 November 2017 October 2017 September 2017 August 2017 July 2017 June 2017 May 2017 April 2017 March 2017 February 2017 January 2017 December 2016 November 2016 October 2016 September 2016 August 2016 July 2016 June 2016 May 2016 April 2016 March 2016 February 2016 January 2016 December 2015 November 2015 October 2015 September 2015 August 2015 July 2015 June 2015 May 2015 April 2015 March 2015 February 2015 January 2015 December 2014 November 2014 October 2014 September 2014 August 2014 July 2014 June 2014 May 2014 April 2014 March 2014 February 2014 January 2014 December 2013 November 2013 October 2013 September 2013 August 2013 July 2013 June 2013 May 2013 April 2013 March 2013 February 2013 January 2013 December 2012 November 2012 October 2012 September 2012 August 2012 July 2012 June 2012 May 2012 April 2012 March 2012 February 2012 January 2012 December 2011 November 2011 October 2011 September 2011 August 2011 July 2011 June 2011 May 2011 April 2011 March 2011 February 2011 January 2011 December 2010 November 2010 October 2010 September 2010 August 2010 July 2010 June 2010 May 2010 April 2010 March 2010 February 2010 January 2010 December 2009 November 2009 October 2009 September 2009 August 2009 July 2009 June 2009 May 2009 April 2009 March 2009 February 2009 January 2009 December 2008 November 2008 October 2008 September 2008 August 2008 July 2008 June 2008 May 2008 April 2008 March 2008 February 2008 January 2008 December 2007 November 2007 October 2007 September 2007 August 2007 July 2007 June 2007 May 2007 April 2007 March 2007 February 2007 January 2007 December 2006 November 2006 October 2006 September 2006 August 2006 July 2006 June 2006 May 2006 April 2006 March 2006 February 2006 January 2006 December 2005 November 2005 October 2005 September 2005 August 2005 July 2005 June 2005 May 2005 April 2005 March 2005 February 2005 January 2005 December 2004 November 2004 October 2004 September 2004 August 2004 July 2004 June 2004 May 2004 April 2004 March 2004 February 2004 January 2004 October 2003 August 2003 July 2003 May 2003 April 2003 March 2003 January 2003 November 2002 October 2002 July 2002 May 2002 April 2002 March 2002 February 2002 November 2001 October 2001 September 2001 August 2001 July 2001 June 2001 May 2001 April 2001 March 2001 February 2001 January 2001 December 2000 November 2000 October 2000 September 2000 August 2000 July 2000 June 2000 April 1999 March 1999 September 1997 August 1997 July 1996 September 1993 July 1991 December 1988 December 1985 January 1980



2017/06/26 Intel Computer Museum in Santa Clara
π 2017-06-26 01:01 in Sciencemuseums
While my friend Patrick was visiting, we went to visit the intel computer museum that is nearby. It's not huge, but worth an hour. They have a good history of computing from their perspective, including all the chips they made over time. Nice to see them again.



huge piece of silicon wafers are made of
huge piece of silicon wafers are made of

looks like this when done
looks like this when done



2017/06/22 Droid and Friends, First Thunderhill 5 miles with the F458C
π 2017-06-22 01:01 in Cars, Ncars
This day wasn't going to be easy. I had just come back from EDC in Vegas 3 day prior with a schedule of 19:00 to 07:00, and had to get up at 06:00, an hour before I was going to bed, just 3 days later.
Once I got there, the temperatures peaked at 115F/46C, and all the cars got way too hot, including the drivers. Then again it was just as hot in Vegas, so I did ok considering but had to short shift to avoid overheating the engine. The tires were also probably more greasy than normal, but on my last lap of the last session I got a 3:20 when my best time ever in the Mclaren was 3:30, so that's not bad :)
(hopefully another time with cooler temps, I should be able to go a few seconds faster still)








I got a sound defusing kit for my car since it was a bit loud :)
I got a sound defusing kit for my car since it was a bit loud :)


2017/06/16 3 more days at EDC 2017, Las Vegas
π 2017-06-16 01:01 in Clubbing, Edc, Festivals
Another year, another EDC. Weather in Vegas was stupid hot (peaks of 115F/46C). I got another chance to try my new Neopixel shirt/pants combo, although getting all the electronics through security in airports, isn't ideal...






Before the first day started, some locations had small markets where you could buy all the rave gear you could need, for those who didn't come prepared :)


and you could spend hours making your bracelets. I shouldn't make fun because I spent even more hours on my LED shirt :)
and you could spend hours making your bracelets. I shouldn't make fun because I spent even more hours on my LED shirt :)

More rave gear on site if you needed it:


Getting to the festival grounds has become an increasing problem, moving almost 150,000 people to and from the racetrack in a 3H window, or so, has become a real challenge, despite huge amount of busses (the busses themselves had 3H-ish lines in some places).

those folks made full use of carpooling :)
those folks made full use of carpooling :)

Most people, including me, took shuttles, which took a reasonable enough 1H to get there and back, but they had stupid lines that could take up to 3H. The picture below is the best possible case scenario I saw one day I got lucky. Some people got close to passing out in the heat, and apparently one person died in line on the way back due to a medical issue that was not addressed timely enough :(
While Insomniac had plenty of busses, the loading was not streamlined enough and included a lot of unnecessary waits, making some lines ridiculously long. One day, I took another line to another hotel just so that I could get back to Vegas and then took a short cab back to my hotel:



Anyway, once arrived at the racetrack, things were good. Pictures of the grounds:

it looks less impresive during the day
it looks less impresive during the day









sunrise coming
sunrise coming












You could even get weddings:


Many carnival rides, but the lines were long at most of them0




And the ball pit was a fun place to relax :)




Pictures of people and signs:

bad ass tatoo
bad ass tatoo



Other people were lit up, like me:


I remember this guy from last year, awesome costume and makeup
I remember this guy from last year, awesome costume and makeup

expensive triple row LED shoes
expensive triple row LED shoes



Fun signs:

damn straight!
damn straight!



haha!
haha!


This year definitely had a nice collection of art cars from burning man:


dancetronauts
dancetronauts

nicely gave me a tour
nicely gave me a tour











Of course, EDC was about lots of great DJs, and lots of great DJs it was:





Armin
Armin





Awesome fireworks:

Day #2:


Ruben de Ronde played an awesome set
Ruben de Ronde played an awesome set







Tiesto was back, not playing Trance :)
Tiesto was back, not playing Trance :)



Another solid set from Above and Beyond
Another solid set from Above and Beyond





Awesome fireworks again:

Day #3 was sadly shorter for me, great lineup, but not enough sleep and I was too tired to enjoy the end:





PvD
PvD

After PvD, I lamed out, went back to the airport and flew back home to get some much needed sleep. I still had a great time despite this.

What insomniac needs to fix for next year:

  • no VIP lines at many shuttle stops, so basically VIP didn't get you in and out any quicker in many places :(
  • streamline the bus loading/unloading to improve throughput
  • Lines like the Village loading in front of Luxor, were 2-3H in the sun. That's totally not ok.
  • What they did great:

  • the Trance lineup was solid, even if the stage, Quantum Valley, was a lesser one
  • the searches were not over the top (I didn't have to empty every single last pocket of everything)
  • 2017/06/16 A Few Hours in Vegas around EDC
    π 2017-06-16 01:01 in Ntrips, Trips, Vegas
    A few pictures on the way to LAS:







    Like last years, I went to attend EDC, and honestly I didn't have many waking hours that weren't spent there, but here are some pictures of the few of them:

    I had a nice kobe beef burger with seared foie gras and black truffle on top. Pricey, but damn good :)


    I went to the Luxor to see the Bodies and Titanic exhibitions. Both were good, but no pictures allowed:




    Other random pictures:

    gondola ride in 115F weather...
    gondola ride in 115F weather...









    And on the way to/from EDC, we drove through the nearby air force base, a couple of pictures:



    On the last day, I did the high roller 30mn loop around sunset:










    And that was that for Vegas, nothing much more, due to sheer lack of time.

    See more images for A Few Hours in Vegas around EDC
    2017/06/03 SVArtFestival
    π 2017-06-03 01:01 in Outings











    See more images for SVArtFestival
    2017/06/02 LED Pants and Shirt Programmed With Arduino on ESP8266
    π 2017-06-02 01:01 in Arduino, Clubbing, Electronics
    ===>>> See this full article on the why and evolution of my LED outfit <<<===

    So, this all started with some LED shoes I hacked to last 12H instead of 4, and it ended with me learning how to program arduino like microcontrollers to control neopixels (aka WS2811/WS2812/WS2812B) while being able to receive Infrared/IR commands. The latter is actually difficult but you go read that page to learn why

    Since I've met plenty of people who complimented for my neopixel shirt and pants combo, and some who asked questions about them, I thought I'd write some quick page to explain how it all works and how you can do similar things, since it's more fun if I'm not the only one lit up at Dreamstate (which has been less of a problem at burning man).

    Here is a video summary:

    Show me the code!

    Sure, it's here: https://github.com/marcmerlin/Neopixel-IR (but go to the end of this page for more details).

    So, I have 3 versions of the shirt, let's go through them depending on how complex you'd like to go:

    Multi Color LED strip, non controllable



    It used a 12V controllable dimmer: https://www.amazon.com/gp/product/B00MHKCTLE which can simply change the brightness of the LEDs, which are of a set color. I bought the LED strip in Akihabara Japan, but I'm guessing something similar can be found elsewhere.

    Tri Color Controllable LED strip



    This version is better in that the LED strip has 3 channels, one for reach of Red, Green, and Blue. I uses a tri color controller like this one: https://www.amazon.com/gp/product/B01410R4KS or remote controlled: https://www.amazon.com/gp/product/B00PBOJNZS
    Those controllers can create any color and flash it at any interval, however:

  • they are a flat trip that doesn't really like being bent
  • all the LEDs are in series, so if the chain fails somewhere, nothing lights up beyond the point of failure (which is why I have extra wires soldered on to make redundant paths and get around breakage
  • I have had some sections of 3 LEDs where one color died
  • All of the controllers I tried have a dimming function, but it fails to work when I use the fade dimming patterns, which means they are full bright, suck battery and blind others. I've therefore had to add a 2nd voltage regulator where I can just dim the voltage sufficiently so that the current is then also capped by each color string and therefore the brightness is controlled (you cannot limit the global current fed to the LED controller because you don't know whether it's all fed into a single color, or shared amongst 3).
  • Of course the last thing is that all the LEDs for a color are in series in a single circuit, so you light up all the reds, or all the blues or greens, or none. You can't turn on one LED individuallly. This is where the next solution comes in.
  • ESP8266/Arduino Controlled Neopixels



    To fix the issue of not being able to have custom multi color LED patterns, where each LED/pixel can be controlled separately, the solution is neopixels (aka WS2811/WS2812/WS2812B). Each LED/pixel is controllable separately, which is done by a computer, in this case the ESP8266 can run my own programs to control all the LEDs.
    The ESP8266 is a 3.3V based microcontroller for low power use (good when battery powered) while the neopixels are 5V powered, but thankfully the neopixels can use 3.3V signalling from the ESP8266 while being 5V powered to light up properly. The one thing to keep in mind is that neopixels use some power even if they are not lit. In my case 200 neopixels, take about 120mA when they are off, and 4.5A when they are all lit in white on full brightness.

    Neopixels are almost infinitely versatile, instead of having them in single line strips like on my shirt and pants, you can also make display matrices out of them:


    I've then written code that receive the IR commands from the remote and execute different code that creates different light patterns, which is explained in more details and available on this page and you can get the code from github.

    Here is a video that shows all 3 modes, jump to 3:50 for the neopixel bit:


    More pages: April 2024 March 2024 February 2024 January 2024 December 2023 November 2023 October 2023 September 2023 August 2023 July 2023 June 2023 May 2023 April 2023 March 2023 February 2023 January 2023 December 2022 November 2022 October 2022 September 2022 August 2022 July 2022 June 2022 May 2022 April 2022 March 2022 February 2022 January 2022 December 2021 November 2021 October 2021 September 2021 August 2021 July 2021 June 2021 May 2021 April 2021 March 2021 February 2021 January 2021 December 2020 November 2020 October 2020 September 2020 August 2020 July 2020 June 2020 May 2020 April 2020 March 2020 February 2020 January 2020 December 2019 November 2019 October 2019 September 2019 August 2019 July 2019 June 2019 May 2019 April 2019 March 2019 February 2019 January 2019 December 2018 November 2018 October 2018 September 2018 August 2018 July 2018 June 2018 May 2018 April 2018 March 2018 February 2018 January 2018 December 2017 November 2017 October 2017 September 2017 August 2017 July 2017 June 2017 May 2017 April 2017 March 2017 February 2017 January 2017 December 2016 November 2016 October 2016 September 2016 August 2016 July 2016 June 2016 May 2016 April 2016 March 2016 February 2016 January 2016 December 2015 November 2015 October 2015 September 2015 August 2015 July 2015 June 2015 May 2015 April 2015 March 2015 February 2015 January 2015 December 2014 November 2014 October 2014 September 2014 August 2014 July 2014 June 2014 May 2014 April 2014 March 2014 February 2014 January 2014 December 2013 November 2013 October 2013 September 2013 August 2013 July 2013 June 2013 May 2013 April 2013 March 2013 February 2013 January 2013 December 2012 November 2012 October 2012 September 2012 August 2012 July 2012 June 2012 May 2012 April 2012 March 2012 February 2012 January 2012 December 2011 November 2011 October 2011 September 2011 August 2011 July 2011 June 2011 May 2011 April 2011 March 2011 February 2011 January 2011 December 2010 November 2010 October 2010 September 2010 August 2010 July 2010 June 2010 May 2010 April 2010 March 2010 February 2010 January 2010 December 2009 November 2009 October 2009 September 2009 August 2009 July 2009 June 2009 May 2009 April 2009 March 2009 February 2009 January 2009 December 2008 November 2008 October 2008 September 2008 August 2008 July 2008 June 2008 May 2008 April 2008 March 2008 February 2008 January 2008 December 2007 November 2007 October 2007 September 2007 August 2007 July 2007 June 2007 May 2007 April 2007 March 2007 February 2007 January 2007 December 2006 November 2006 October 2006 September 2006 August 2006 July 2006 June 2006 May 2006 April 2006 March 2006 February 2006 January 2006 December 2005 November 2005 October 2005 September 2005 August 2005 July 2005 June 2005 May 2005 April 2005 March 2005 February 2005 January 2005 December 2004 November 2004 October 2004 September 2004 August 2004 July 2004 June 2004 May 2004 April 2004 March 2004 February 2004 January 2004 October 2003 August 2003 July 2003 May 2003 April 2003 March 2003 January 2003 November 2002 October 2002 July 2002 May 2002 April 2002 March 2002 February 2002 November 2001 October 2001 September 2001 August 2001 July 2001 June 2001 May 2001 April 2001 March 2001 February 2001 January 2001 December 2000 November 2000 October 2000 September 2000 August 2000 July 2000 June 2000 April 1999 March 1999 September 1997 August 1997 July 1996 September 1993 July 1991 December 1988 December 1985 January 1980

    Contact Email