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by scidata
Wed Mar 11, 2015 4:15 pm
Forum: Bare metal, Assembly language
Topic: 4 7 segment LED display
Replies: 5
Views: 1677

Re: 4 7 segment LED display

Here's a tutorial and video, but the last time I did this was with a KIM-1 ~1978 !
http://razzpisampler.oreilly.com/ch09.html
by scidata
Tue Mar 10, 2015 1:50 pm
Forum: Advanced users
Topic: Cassandra
Replies: 2
Views: 1272

Re: Cassandra

DougieLawson wrote:Just a small number of results.
Thanks. The first hit is uber cool. http://www.datastax.com/dev/blog/32-nod ... ra-cluster
by scidata
Tue Mar 10, 2015 1:36 pm
Forum: Advanced users
Topic: Cassandra
Replies: 2
Views: 1272

Cassandra

Has anyone implemented Cassandra on the Pi using recent stuff like MariaDB? (Looking for tips to help me avoid wasted days)
by scidata
Tue Mar 10, 2015 12:28 pm
Forum: Advanced users
Topic: Pi-Based Lander
Replies: 8
Views: 1234

Re: Pi-Based Lander

Again, this is not really about technical specifications, it's about imagination, inspiration, the appreciation of history, things like that. Why did they build a replica of the Wright Flyer in 2003?
by scidata
Tue Mar 10, 2015 12:22 pm
Forum: Networking and servers
Topic: Any chance you can setup Skype? Or other...
Replies: 11
Views: 7856

Re: Any chance you can setup Skype? Or other...

Apparently Windows 10 devices will have Skype built-in, hopefully that will include the Pi.
by scidata
Mon Mar 09, 2015 9:33 pm
Forum: Advanced users
Topic: Pi-Based Lander
Replies: 8
Views: 1234

Re: Pi-Based Lander

A pretty big catapult for starters! Hey, don't knock catapults. The Keck observatory recently provided strong evidence for the Jeans atmospheric escape model, which essentially is that molecules can reach escape velocity due to billiard-ball type collision. Anyway, my point is that the 8085 (1977) ...
by scidata
Mon Mar 09, 2015 9:05 pm
Forum: Advanced users
Topic: Pi-Based Lander
Replies: 8
Views: 1234

Pi-Based Lander

It's been almost 20 years since the 8085-based Mars Sojourner rolled around on Mars. What would it take to duplicate that feat with a space-hardened Pi ?
by scidata
Mon Mar 09, 2015 7:51 pm
Forum: For sale
Topic: Raspberry Pi Supercomputer (For Sale!)
Replies: 7
Views: 2473

Re: Raspberry Pi Supercomputer (For Sale!)

Heater wrote:Firstly, there is no such thing as a Raspberry Pi "super computer"
The other day I divided the BOINC points per day of my best dual GPU PC by that of a pi B+ just for grins.
The number: 10,000 (rounded a bit)
by scidata
Sun Mar 08, 2015 10:09 pm
Forum: Gaming
Topic: Minecraft: Pi Edition out of GUI
Replies: 12
Views: 6216

Re: Minecraft: Pi Edition out of GUI

I'm not entirely sure I understand the problem, but controlling Minecraft is usually done from a separate terminal window: - start Minecraft (all the way into a world) - open a new terminal window - navigate to <your particular minecraft dir>/api/python - launch Python python - import control module...
by scidata
Sat Mar 07, 2015 5:28 pm
Forum: Other
Topic: Windows 10 on Pi
Replies: 36
Views: 5401

Re: Windows 10 on Pi

"If it isn't simple and easy then it's not for me" Don't sell yourself short. You found your way to the RPF forum, that puts you in the elites already :D It took me 1 year to learn Linux well enough to develop in it, not just use it. It has taken me almost 30 years (so far) to learn Windows. I think...
by scidata
Sat Mar 07, 2015 1:48 am
Forum: Staffroom, classroom and projects
Topic: Pi Day
Replies: 1
Views: 897

Re: Pi Day

Oh, yes, I see it's mentioned in page 2 of the blog
http://www.raspberrypi.org/blog/page/2/ ... for-pi-day
by scidata
Sat Mar 07, 2015 1:42 am
Forum: Staffroom, classroom and projects
Topic: Pi Day
Replies: 1
Views: 897

Pi Day

Pi day is special this year. Scientific American has a neat promotion:
http://www.scientificamerican.com/produ ... ve-package

I wonder if the RPF has anything planned.
by scidata
Sat Mar 07, 2015 12:22 am
Forum: Automation, sensing and robotics
Topic: Monitoring Motion
Replies: 3
Views: 1256

Re: Monitoring Motion

Here's a study that used something called the "Actigraph accelerometer" http://journals.plos.org/plosone/articl ... ne.0103559
by scidata
Thu Mar 05, 2015 12:35 pm
Forum: Staffroom, classroom and projects
Topic: Alternative qualifications using Pi's?
Replies: 6
Views: 1758

Re: Alternative qualifications using Pi's?

One possible tack is to look at credentialing organizations for professionals in this area, perhaps others are thinking along the same lines (ie student qualifications). http://ibcces.org/resources/
by scidata
Wed Mar 04, 2015 5:26 pm
Forum: Graphics programming
Topic: Plans to support Vulkan?
Replies: 10
Views: 8597

Re: Plans to support Vulkan?

It would be nice if compute was a general fork of GPU/OpenGL/Vulkan. To be held up by stuff like tesselation is unfortunate. The same goes for integer/floating point.
by scidata
Mon Mar 02, 2015 2:11 pm
Forum: General discussion
Topic: Minecraft Network Game question
Replies: 4
Views: 788

Re: Minecraft Network Game question

The router would also provide a gateway machine, which is perhaps required for a Minecraft connection.
by scidata
Mon Mar 02, 2015 12:05 am
Forum: General discussion
Topic: Future Version Plans?
Replies: 16
Views: 4296

Re: Future Version Plans?

A faster, more capable GPU would be nice, with full OpenCL and active encouragement for developers from Broadcom.
by scidata
Thu Feb 26, 2015 4:52 pm
Forum: General discussion
Topic: Disk image repository
Replies: 15
Views: 4594

Re: Disk image repository

I think the existence of a repository like this could make the product more useful for a wider audience. And if they exist it would be nice if you could find them more easily. I once thought as you do, young Padawan. However, mastering the way of APT will set you free. Pervasive learning of the Lin...
by scidata
Thu Feb 26, 2015 1:11 pm
Forum: General discussion
Topic: RPi 2 - Web server performance and questions
Replies: 32
Views: 24282

Re: RPi 2 - Web server performance and questions

One of the things that makes the pi so compelling is the freedom to experiment and test by standing up and tearing down rigs within hours not weeks. Want to decide amongst Apache, nginx, Lighttpd, node, PERL, framework-du-jour, squirrel-in-cage, etc? Just build each and compare directly. Or even kee...
by scidata
Wed Feb 25, 2015 1:10 pm
Forum: General discussion
Topic: Is a quad core really 4 times faster than a single core?
Replies: 22
Views: 5252

Re: Is a quad core really 4 times faster than a single core?

The quantum leap in performance is going from 1 to 2 cores. Blocking is almost eliminated and one core can process flat out while the other talks to the I/O. Also, most software (app and O/S) now efficiently handles 2 cores. That's not true (yet) for 4+ cores.
by scidata
Tue Feb 24, 2015 2:24 pm
Forum: General discussion
Topic: The busiest Pi...
Replies: 17
Views: 3773

Re: The busiest Pi...

Throttling up a web server with simulated traffic just to see the pi's limit is fun. It's a surprisingly capable little engine, even Pi 1.
by scidata
Sun Feb 22, 2015 11:23 pm
Forum: General discussion
Topic: Stellarium on Pi
Replies: 21
Views: 9990

Re: Stellarium on Pi

Stellarium is absolutely wonderful, as a desktop app, telescope controller (using a 'scope stack' analogous to a 'web stack'), and even a micro-planetarium show controller (there's actually a market in small domes & projectors). The big problem so far with the raspi is the locked GPU. This is also a...
by scidata
Thu Feb 19, 2015 1:04 pm
Forum: Bare metal, Assembly language
Topic: Baremetal Forth?
Replies: 14
Views: 5922

Re: Baremetal Forth?

Learning to program by writing programs with examples and minimal guidance is flawed, especially for beginners. It takes a much more immersive, personal, 'syntonic' approach.
Here's an argument for Forth as a learning language
http://www.scidata.ca/?p=895
by scidata
Wed Feb 18, 2015 7:07 pm
Forum: General discussion
Topic: Building 24 Raspberry Pi2 Cluster
Replies: 29
Views: 17203

Re: Building 24 Raspberry Pi2 Cluster

One thing that is useful to work on is a cluster controller. A pi (or good router) can provide DHCP, DNS, NTP, FTP, and other services (even exotic stuff like NAS, Beowulf, ZFS). This knowledge (and maybe even the controller itself) can be moved to a big, more powerful cluster eventually.

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