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2017/05/18 Droid and Friends, Thunderhill 3 miles, and first track day of the year
π 2017-05-18 00:00 in Cars
Tires were noe new, I was rusty, fair amount of slow traffic blocking on many laps, so not my best times, But eh, it was a day at the track, so still had a good time :)

Attila's new ride
Attila's new ride

Oh boy, this looks mean :)
Oh boy, this looks mean :)


Hopefully mine doesn't look too bad :)
Hopefully mine doesn't look too bad :)

Ovidiu doing a test fit :)
Ovidiu doing a test fit :)

tire testing, or something :)
tire testing, or something :)

BR Racing, to support us and our cars. Thanks guys!
BR Racing, to support us and our cars. Thanks guys!

2017/05/07 MTV A La Carte Art Festival
π 2017-05-07 00:00 in Public


a roomba for grass, good iea, but expensive ($1500+)
a roomba for grass, good iea, but expensive ($1500+)





Always nice pictures:





Also, nice display of RC aircraft and cars:












See more images for MTV A La Carte Art Festival
2017/05/06 Omakase @ Mitsunobu
π 2017-05-06 00:00 in Dining
I wanted to give Jennifer a change from home cooking, so we went to Mitsunobu for their Omakase tasting menu. It was good :)









See more images for Omakase @ Mitsunobu
2017/05/05 NDA drive to Alice's
π 2017-05-05 00:00 in Cars
Nice day, lunch a bit far, twisty road on the way? Sign me up :)









See more images for NDA drive to Alice's
2017/05/01 My 2nd Shout Out By Armin On The State Of Trance
π 2017-05-01 00:00 in Clubbing
First time was in 2006: https://youtu.be/ymkcqzs1AFg?t=1h48m10s

Then, in 2017: https://youtu.be/DKVqUDhz3Cc?t=33m50s

2017/04/30 Cupertino Cherry Blossom Festival
π 2017-04-30 00:00 in Public
Another year, another Cherry Blossom Festival in Cupertino, nice demos, displays and art:



Multiple sport demos and performances:





For animals, a koi pond, and japanese dogs:





Lots of Ikebana:











Dolls:




Kanji Art:




Dance and music performances:



See more images for Cupertino Cherry Blossom Festival
2017/04/29 FC Drivers Southbound to San Jose and Los Gatos Luxury Cars Open House
π 2017-04-29 00:00 in Cars
Nice weather, pretty clear roads, yummy crepes.


we got there 18mn early, we had time to burn :)
we got there 18mn early, we had time to burn :)

finally the other folks appeared :)
finally the other folks appeared :)






nice P1
nice P1










2017/04/24 Adafruit GFX on NeoMatrix and RGB Matrix Panel Demo
π 2017-04-24 00:00 in Arduino
Give me code:
  • https://github.com/marcmerlin/Adafruit_NeoMatrix/tree/master/examples/MatrixGFXDemo
  • https://github.com/marcmerlin/RGB-matrix-Panel/tree/master/examples/PanelGFXDemo
  • All the displays, 4 made with neopixels and soldered by hand
    All the displays, 4 made with neopixels and soldered by hand

    Yeah, the 24x24 one took forever to lay out, glue and solder (6H+)
    Yeah, the 24x24 one took forever to lay out, glue and solder (6H+)

    More than 2 years ago, I spent many hours writing an interrupt written driver for LED matrices that require fast line scanning while you setup the right rows, and even faster per color refreshes where you turn the color on and off depending on how bright you want each color component to be to yield different color mixes. This is explained in more details on my page on Driver for direct driving single to 3 color LED Matrices with software PWM.

    Then came in Neopixels which can be individually addressed without fast row scanning, and the Adadfruit Neomatrix library. Those made creating color matrices much more trivial (except for the part where you have to actually build and solder that matrix):

    2 row scanned matrices on the upper left, 7x7 neomatrix, another row scanned 32x16 Adafruit panel.
    2 row scanned matrices on the upper left, 7x7 neomatrix, another row scanned 32x16 Adafruit panel.

    on the bottom row, self built 16x8 neomatrix, and another 12x12 neomatrix
    on the bottom row, self built 16x8 neomatrix, and another 12x12 neomatrix

    I ended up taking my old Adafruit GFX demo I wrote fro my interrupt driven scan matrices, porting it to Neomatrix (which was trivial) and then extending it. You can find my MatrixGFXDemo code here,
    Soon afer, I dug up my Adafruit 16X32 RGB LED Matrix Panel, setup an old Arduino Mega to control it and have enough RAM left to run some fun code (on an Uno memory would have been too tight), it turns out that thanks to Adafruit GFX support, it took very little time to get my same demo working on the RGB Panel.

    Here is a video of the demo I wrote on all those different displays:

    Here are some things the demo does:

  • Init displays the same 8x8 pattern as many times as it will fit

  • The code will then draw lines, rectangles and circles that match the size of the display:


  • If the display is at least 16x8, it will display the resolution in various ways appropriate to the display size:




  • another part of the demo displays an 8x8 color pixmap with drawRGBBitmap I added in Adafruit-GFX-Library and bounces it around on any display bigger than 10x10:


  • then, it will display a 24x24 bitmap which on most displays will be panned around to show the whole picture:


  • Hope you enjoy the demo, it should work pretty trivially on any display that supports Adafruit::GFX, see https://github.com/marcmerlin/RGB-matrix-Panel/blob/master/examples/PanelGFXDemo/PanelGFXDemo.ino#L21 on how some backend specific code can be #define'd to work on other backends.

    2017/04/21 Spring Skiing at Heavenly
    π 2017-04-21 00:00 in Snow
    Neither Arturo nor Johannes had gone to Heavenly this year, and it was about to close most of its lifts after this week, so Arturo offered a day trip there, which we both graciously accepted. We left around 05:30 and arrived by the nevada border by 09:30, parked, and took the gondola up because the connecting california lifts were already closed.


    how's that cindaquil?
    how's that cindaquil?


    we actually stopped at mid station for a look, which I had never done :)
    we actually stopped at mid station for a look, which I had never done :)



    We then had to follow the sun and started down at stagecoach and went up to dipper as things got warmer, and eventually moved to sky express. The snow was spring snow, we had to avoid the ice in some places and sticky slush in others, but overall the snow was good on groomers and ok elsewhere. And for snow, there is lots of it.






    lots of things were closed of course
    lots of things were closed of course


    Thanks to Arturo for getting us there, that was fun.

    See more images for Spring Skiing at Heavenly
    2017/04/16 IoTuz Driver ported to Expressif ESP32 WROVER board
    π 2017-04-16 00:00 in Arduino
    As explained on this page, I wrote a pretty extensive driver-set for an ESP32 based board with lots of IO, but hardly anyone has that board (fewer than 100 made), so I ported what I could of the code to the WROVER.


    Sadly the WROVER lacks a touch screen, so you'll have to wire at least a rotary encoder or a joystick. In the demo above I also wired 2 neopixels and an IR receiver to mirror the hardware on the IoTuz.

    Source code: https://github.com/marcmerlin/IoTuz

    See this video for a demo:

    You'll definitely want to read https://github.com/marcmerlin/IoTuz/blob/master/README.md carefully, especially the WROVER section.

    On an ILI3941 based WROVER, you should also be able to play tetris and breakout:

    Enjoy!


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