Recent Posts

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21
AI Programming / Re: Raspberry Pi 3 Software Environment
« Last post by keghn on October 20, 2017, 11:24:56 pm »

The new pi-top:
https://pi-top.com/


22
AI Programming / Raspberry Pi 3 Software Environment
« Last post by elpidiovaldez5 on October 20, 2017, 10:34:34 pm »
The Raspberry Pi 3 is great for robotics.  Sadly I am overwhelmed by insurmountable opportunities !  I want to set up an OS which will let me accomplish all of the following:

  • Install ROS (preferably Kinetic, preferably from binaries)
  • Run Raspberry PI Camera V2 as a ROS node publishing video
  • Use I2C bus
  • I would prefer the most efficient (stripped down) system possible.   There is no need to support graphical UI

My current understanding is:

  • Raspbian is efficient, optimised for Pi.  It supports I2C and Pi Camera V2, but not ROS without a lot of messing about.  I got ROS Kinetic going once - it took days to compile and needed a lot of manual patching
  • Ubuntu Mate has an image for PI 3 WITH ROS.  There are issues using I2C and possibly Pi Camera, there are hints of solutions on the internet, but nothing I am sure will work

Has anybody managed to get ROS/Camera/I2C all going at the same time on any system ?  Are there any binaries for ROS  using Raspbian yet ?  Any recommendations ?  I want to get a stable OS with all the components I need installed and working before starting to code.

Thanks !
23
General Chat / Re: The Banach–Tarski Paradox
« Last post by Maviarab on October 20, 2017, 05:35:12 pm »
Noodle suitably baked.  Where's that damn spoon gone....
24
Graphics / Re: 2D or not 2D...
« Last post by Maviarab on October 20, 2017, 05:16:30 pm »
That's actually pretty cool.
25
Graphics and Video Software / Re: FFmpeg - individual frames to video
« Last post by keghn on October 20, 2017, 04:45:11 pm »
 Thanks for the iinfo. I will add it to my data base.
26
Graphics / 2D or not 2D...
« Last post by Art on October 20, 2017, 04:08:44 pm »
...That is the question. ;)

While it isn't actually a holograph / hologram, it does show what can be done with spinning, 2D led strips.

https://www.chonday.com/26072/handegenr5/
27
General Project Discussion / Re: Help creating a name for a fake PDA from the 80's
« Last post by Art on October 20, 2017, 02:33:54 pm »
Good points Zero.

Wait...how about some nice soft, pastel-colored buttons/keys...I'm thinking Green and Black trim. That would help promote a nicer, gentler and more in touch with the earth and its rotation.

For a bit of background: The OxfordWord blog continues to explain that computers started as a complex set of analogue mechanical devices. In the 1930s and 40s, these computing devices started to use a new number system to make calculations. Instead of our normal decimal system of 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9; these computers used a binary system of digits to represent everything. The letter B is 01000010. The letter C is 01000011. Thus, these computers became known as the DIGITAL computer.

The first PDA, the Organizer, was released in 1984 by Psion, followed by Psion's Series 3, in 1991. So coming up with a Fake 80's name for it might be the People's Digital Accountant, since is took care of providing needed numbers and solutions.

############

Any of you Brits recall a device called an Otis King L?  Here is a refresher: http://www.vintagecalculators.com/html/otis_king_l.html

I still have a few of these in my closet where they are only used to calculate or collect the accumulation of dust. ;) http://www.vintagecalculators.com/html/slide_rule.html

Last but not least was this stylish and ever so cumbersome, Curta. Interesting story on its development BTW.
http://www.vintagecalculators.com/html/curta.html

Still searching for a descriptive Fake name for the 80's PDA (which wasn't invented yet, thus "Fake"). Hmm...

28
Graphics / Re: Can you Handle a Mandel (brot)?
« Last post by ranch vermin on October 20, 2017, 02:12:16 pm »
the 2d ones are just as good as the 3d ones,   they have halucinagenic properties.
29
Graphics / Re: Can you Handle a Mandel (brot)?
« Last post by Art on October 20, 2017, 01:49:59 pm »
One anomaly about these "zoom in" viewings is that I find that my eyes are quickly scanning about the central portion of the image, trying to focus on where the actual center is going to be. It feels like my eyes are doing a dance, darting around, looking for that one spot where the zooming will take them.

Cool and trippy stuff!
30
Graphics / Re: Can you Handle a Mandel (brot)?
« Last post by ranch vermin on October 20, 2017, 12:45:20 pm »
if u fractal data,  it ands with itself... see here..

101011011

then the next zoom of the fractal...

101011011 000000000 101011011 000000000 101011011 101011011 000000000 101011011 101011011   

then the next zoom...

101011011 000000000 101011011 000000000 101011011 101011011 000000000 101011011 101011011   
000000000 000000000 000000000 000000000 000000000 000000000 000000000 000000000 000000000
101011011 000000000 101011011 000000000 101011011 101011011 000000000 101011011 101011011   
000000000 000000000 0?0000000 000000000 000000000 000000000 000000000 000000000 000000000
101011011 000000000 101011011 000000000 101011011 101011011 000000000 101011011 101011011   
101011011 000000000 101011011 000000000 101011011 101011011 000000000 101011011 101011011   
000000000 000000000 000000000 000000000 000000000 000000000 000000000 000000000 000000000
101011011 000000000 101011011 000000000 101011011 101011011 000000000 101011011 101011011   
101011011 000000000 101011011 000000000 101011011 101011011 000000000 101011011 101011011   

then in that table if you access x=1 y=2 z=3   you get a&b&c in one hit.  (the question mark.   and its zero.)
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